Abstract Introduction Research findings about intimate-partner violence (IPV) have focused mostly on women as victims of violence. Recent studies show the importance of violence inflicted by women towards men or between same-sex couples. Objective To estimate the prevalence of intimate-partner violence and its association with alcohol and drug consumption in a representative sample of men and women in Mexico through secondary data analysis. Method The data come from a representative sample who filled out the section on intimate-partner violence in the Mexican 2011 Encuesta Nacional de Adicciones (National Survey on Addictions). Results The prevalence of intimate-partner violence in the last year was 17.6% against women and 13.4% against men. If one of the two partners consumed substances, the risk that men and women would experience violence increased, and that risk was even greater if both consumed. Discussion and conclusion This is the first time violence against men was reported in a Mexican national study. The findings show that gender-based violence should also be considered a result of social and cultural violence.

Resumen Introducción Los hallazgos de investigación sobre la violencia de pareja se han centrado principalmente en las mujeres como víctimas de la violencia. Estudios recientes destacan también la importancia de la violencia infligida por las mujeres hacia los hombres o entre parejas del mismo sexo. Objetivo Estimar la prevalencia de la violencia de pareja y su asociación con el consumo de alcohol y drogas en una muestra representativa de hombres y mujeres en México mediante un análisis secundario de datos. Método Los datos provienen de la Encuesta Nacional de Adicciones de México 2011, específicamente de una muestra representativa que contestó la sección sobre violencia de pareja. Resultados La prevalencia de violencia de pareja en el último año fue de 17.6% hacia las mujeres y de 13.4% hacia los hombres. Si uno de los dos integrantes de la pareja consumía sustancias, aumentaba el riesgo de que hombres o mujeres experimentaran violencia y ese riesgo era aún mayor si ambos consumían. Discusión y conclusión Esta es la primera vez que se reporta la violencia hacia los hombres en un estudio nacional mexicano. Los resultados muestran que la violencia de género también debe considerarse como resultado de la violencia social y cultural.

Abstract Introduction Although the international literature suggests that women who interrupt a pregnancy in safe conditions do not develop mental health problems, it continues to be a highly stigmatized issue by broad social sectors. It is therefore not surprising that abortion stigma is one of the main factors associated with the presence of mental health problems in women who abort voluntarily. This study explores the association between perceived abortion stigma and depressive symptomatology. Method In a non-probabilistic convenience sample, 114 users of a Legal Interruption of Pregnancy Clinic in Mexico City were interviewed with a structured instrument. Results Respondents obtained low scores of internalized stigma and reported feeling confident that they had made the right decision to terminate their pregnancies, and at peace with themselves. The highest scores for abortion stigma were reported in the group with high depressive symptomatology, with no statistically significant differences being observed due to the sociodemographic characteristics explored. The participants in this study were more concerned about what others might think about their decision to terminate a pregnancy and about how their abortion might affect their relationship with them. Discussion and conclusion These concerns highlight the need to reduce the negative social stigma surrounding abortion and to provide interventions in the same direction among women who interrupt a pregnancy legally in order to reduce the risk of mental health problems such as depression.

Resumen Introducción A pesar de que la literatura internacional señala que las mujeres que interrumpen sus embarazos en condiciones seguras no desarrollan problemas de salud mental, sigue siendo una situación altamente estigmatizada por amplios sectores sociales. Por ello, no es de sorprender que el estigma por abortar sea uno de los principales factores asociados con la presencia de malestares en la salud mental de algunas mujeres que abortan voluntariamente. Este trabajo explora la asociación entre el estigma percibido por abortar y la sintomatología depresiva. Método En una muestra no probabilística y por conveniencia, 114 usuarias de una Clínica de Interrupción Legal del Embarazo de la Ciudad de México fueron entrevistadas con un instrumento estructurado. Resultados Las participantes obtuvieron bajas puntuaciones de estigma internalizado, reportaron sentirse seguras y en paz con ellas mismas por haber decidido interrumpir sus embarazos. Las puntuaciones más altas de estigma por abortar se reportaron en el grupo con sintomatología depresiva elevada, sin que existieran diferencias significativas por las características sociodemográficas exploradas. Las participantes en este estudio estaban más preocupadas por lo que otros pudieran pensar por su decisión de interrumpir su embarazo y por cómo podría afectar el aborto su relación con estas personas. Discusión y conclusión Estas preocupaciones evidencian la necesidad de disminuir el estigma social negativo que rodea al aborto y plantear intervenciones que actúen en el mismo sentido entre las mujeres que interrumpen legalmente un embarazo para disminuir el riesgo de presentar problemas de salud mental como la depresión.

Introduction Epidemiological studies in our country show increases in the consumption of illegal drugs and alcohol. The age of onset has decreased, especially regarding alcohol use. Meanwhile, consumption of inhalants has increased significantly, especially among young women. There are several factors associated with drug use, but the development of resistance strategies, along with its underlying social skills and parenting styles, stand out in a significant way. Method Data comes from a probabilistic survey carried out in November 2012, with students from 7th to 12th school grades, in Mexico City, which was representative for each of its districts. The sample was 26 503 students. Information was obtained through a questionnaire standardized and validated in previous surveys. Results Tobacco consumption decreased significantly (44.3% to 41.0%); 32.9% of the adolescents began its use before age 13. Lifetime consumption of alcohol was 68.2%, while the average age of onset of cannabis use remained at 12.6 years. Lifetime prevalence of any drug use increased from 21.5% to 24.4%. Marijuana was the first drug of choice among students (15.9%). Increases were also found in sexual abuse rate, while suicide attempt decreased. Discussion Although inhalants use remained stable and tobacco use decreased significantly, results show the continued growth of drug use. Given this context, concentrating more efforts in prevention with studies and evaluated interventions for pre-school and elementary school students, as well as for parents and teachers, is a preponderant task.

Introducción Los estudios epidemiológicos en nuestro país muestran un incremento en el consumo de drogas ilegales y de alcohol. La edad de inicio también ha disminuido, especialmente en el consumo de alcohol. Por su parte, el consumo de inhalables se ha incrementado en forma importante, especialmente entre las mujeres jóvenes. Son diversos los factores asociados al consumo de drogas, pero de manera importante destacan el desarrollo de estrategias de resistencia, junto con sus habilidades sociales subyacentes, así como los estilos parentales de crianza. Método La presente es una encuesta probabilística en población escolar de secundarias y bachilleratos de la Ciudad de México que se levantó en noviembre del 2012, con representación a nivel de cada Delegación. La muestra fue de 26 503 alumnos. La información se obtuvo mediante un cuestionario estandarizado y validado en encuestas anteriores. Resultados El consumo de tabaco disminuyó significativamente (de 44.3% a 41.0%), el 32.9% de los adolescentes comenzó a utilizar tabaco antes de los 13 años. El 68.2% consumió alcohol alguna vez; en tanto que la edad de inicio promedio de consumo de esta sustancia se mantuvo en los 12.6 años. La prevalencia de consumo de drogas alguna vez aumentó de 21.5% a 24.4%. La mariguana es la droga de preferencia en la población estudiantil (15.9%). También se encontraron incrementos en la presencia de abuso sexual, mientras que el intento suicida disminuyó. Discusión Los resultados muestran el continuo crecimiento que tiene esta problemática, aunque los inhalables se mantuvieron constantes y el tabaco disminuyó de manera importante. Dado estos resultados, es una tarea preponderante dedicar más esfuerzos a la prevención con estudios e intervenciones evaluadas para preescolar y primaria, así como para los padres de familia y los maestros.

OBJETIVO: Conhecer a prevalência de sintomas depressivos a nível nacional na população de 12 a 65 anos e identificar os principais fatores sociodemográficos e pessoais associados. MÉTODO: Os dados foram obtidos da Pesquisa Nacional de Adições (ENA 2008), um estudo aleatório e probabilístico. Uma sub-amostra de 22.962 indivíduos responderam a seção de sintomas depressivos medida com a Escala de Depressão do Centro de Estudos Epidemiológicos (CES-D). RESULTADOS: A prevalência de sintomas depressivos foi de 5,2%; 7,5% em mulheres e 2,5% em homens. Entre as mulheres, os sintomas se apresentaram mais na região central do país e, entre os homens, a distribuição geográfica foi homogênea. Os fatores que se associaram aos sintomas depressivos foram estar divorciado (mulheres) ou viúvo (homens), ter nível educacional inferior, sentir sua residência como um local não seguro, apresentar dependência de álcool, ser usuário regular de drogas (homens) e abuso sexual. CONCLUSÕES: A distribuição regional de sintomatologia depresiva em mulheres indica a necessidade regional de orientação para prevenção, levando em conta que as distintas problemáticas sociais podem afetar seu bem-estar emocional. Entre os homens, mais estudos são necessários para identificação precoce da depressão.

OBJECTIVE: To describe the prevalence of depressive symptoms in the Mexican population, aged 12 to 65 years, by identifying the main related socio-demographic and personal factors. METHODS: Data are drawn from the National Survey on Addictions 2008 (ENA 2008), a random, probabilistic, multistage study. A randomly selected sub-sample of 22,962 persons answered the section on depressive symptomatology, measured with the Center for Epidemiologic Studies Depression Scale (CES-D). RESULTS: The total prevalence for depressive symptomatology was 5.1%; the prevalence was 7.5% for women and 2.5% for men. For women, more evidence of depressive symptoms was seen in the central region, whereas for men, symptoms were homogeneous across the country. Factors related to the presence of depressive symptoms include being divorced (in women) or widowed (in men), having lower educational attainment, perceiving one's place of residence as unsafe, displaying alcohol abuse or dependence, being a regular drug consumer (in men) and having been sexually abused (males and females). CONCLUSIONS: The regional distribution of depressive symptomatology in women indicates the need for region-specific prevention programs that take into account the different social problems that affect women's emotional well-being. More research is also needed to support the early identification and intervention of men suffering from depression.

Introduction In the international context, Mexico is a country with low drug use level, in turn, it shows an increase when considering the most recent epidemiologic trends. In order to maintain an updated analysis of drug use in general population and to identify the most at risk groups, the National Survey of Addictions (ENA) was held in 2011. Objetive The aim of the study was to determine the lifetime prevalence for any drug and any illegal drug use at a national and regional level, in population aged 12 to 65 years. Also, to acknowledge drug consumption trends since 2002 in Mexico. Material and methods ENA 2011 survey is a randomized, multistage probabilistic study. It is representative at a national level and also for eight regions of the country, including rural and urban population. The sample was 3 849 adolescents and 12 400 adults who answered a computerized version of a standardized questionnaire containing sections of tobacco, alcohol, medical drugs (opiates, tranquilizers, sedatives, amphetamines) and illegal drugs (marijuana, cocaine, crack, hallucinogens, inhalants, heroin and methamphetamines). All participants read and signed an informed consent. Emphasis was made on the voluntary and confidential use of the information. Results The national lifetime prevalence of any drug grew between 2002 and 2011, increasing significantly from 5.0% to 7.8%, while consumption of any illegal drugs increased from 4.1% to 7.2%. By sex, in men, any drug use increased from 8.6% to 13%. Illegal drugs increased from 8.0% to 12.5%. In women, use of any drug increased from 2.1% to 3.0% and use of any illegal drug increased from 1.0% to 2.3%. Marijuana is the first drug of choice (6.5%) followed by cocaine (3.6%). Considering regions, any drug consumption grew significantly in the Western (5.5% to 10.3%), Northeast (5.5% to 10.3%), North Central (7.5% to 9.2%) and South Central (4.2% to 7.5%). As for illegal drugs, there is also a statistically significant increase in these regions, however, growth was proportionally bigger in South Central region, going from 3.5% to 6.8%. Conclusions Results from this study indicate a growth in the consumption of illegal drugs from 2002 to 2011, especially in marijuana. It also shows that men from 18 to 34 years are the most affected by this consumption, while increases in adolescent men have been low. Moreover, the study shows that those who have received some type of prevention, showed a smaller consumption prevalence, indicating that further work is needed in this area with young people to consolidate activities of health promotion and drug use prevention, working with infant population is needed, including a systematic evaluation of the actions mentioned above. In the international context, data from this study confirms that Mexico continues reporting low levels of drug consumption.

Introducción En el contexto internacional, México es uno de los países con bajo nivel de consumo de drogas, pero que, a su vez, reporta un incremento si se consideran las tendencias epidemiológicas más recientes. Con la finalidad de mantener un diagnóstico actualizado del consumo de drogas en la población general y de identificar los grupos en mayor riesgo, se llevó a cabo la Encuesta Nacional de Adicciones 2011 (ENA). Objetivo Conocer la prevalencia alguna vez en la vida de uso de cualquier droga y de cualquier droga ilegal a nivel nacional y regional en población de 12 a 65 años. Así como conocer las tendencias que ha seguido el consumo a partir de 2002. Material y métodos La ENA 2011 es un estudio aleatorio, probabilístico y polietápico con representatividad nacional y para ocho regiones del país. Incluye poblaciones rurales y urbanas. La muestra fue de 3 849 adolescentes y 12 400 adultos quienes contestaron un cuestionario estandarizado en versión computarizada que contiene las secciones de tabaco, alcohol, drogas médicas (opiáceos, tranquilizantes, sedantes, anfetaminas) e ilegales (mariguana, cocaína, crack, alucinógenos, inhalables, heroína y metanfetaminas). Todos los participantes leyeron y firmaron una carta de consentimiento informado. Se hizo énfasis en el carácter voluntario y confidencial de la información. Resultados La prevalencia de consumo de cualquier droga alguna vez en la vida a nivel nacional creció significativamente entre 2002 y 2011 al pasar de 5.0% a 7.8%, mientras que el consumo de cualquier droga ilegal incrementó de 4.1% a 7.2%. Por sexo, en los hombres el consumo de cualquier droga pasó de 8.6% a 13% y de drogas ilegales de 8.0% a 12.5%. En las mujeres, la primera aumentó de 2.1% a 3.0% y la segunda de 1.0% a 2.3%. Las drogas de preferencia continúan siendo la mariguana (6.5%) y la cocaína (3.6%). A nivel regional el consumo de cualquier droga creció significativamente en la Occidental (5.5% a 10.3%), Nororiental (5.5% a 10.3%), Norcentral (7.5% a 9.2%) y Centro Sur (4.2% a 7.5%). En cuanto a las drogas ilegales, también se encuentra un incremento estadísticamente significativo en estas regiones, sin embargo el crecimiento fue proporcionalmente mayor en la región Centro Sur, al pasar de 3.5% a 6.8%. Conclusiones Los resultados de la ENA señalan un crecimiento en el consumo de drogas ilegales de 2002 a 2011, especialmente de la mariguana. Asimismo, se observa que los hombres de 18 a 34 años son la población más afectada por dicho consumo, mientras que en los adolescentes el aumento ha sido mínimo. Por otra parte, el estudio muestra que quienes han recibido algún tipo de prevención presentan las prevalencias de consumo más pequeñas, lo cual indica que es necesario seguir trabajando en esta área con los jóvenes para consolidar las acciones de promoción de la salud y prevención; así como trabajar más con la población infantil, con una evaluación sistemática de todas estas acciones. En el contexto internacional los datos confirman que México continúa con niveles bajos de consumo.

In the course of the last three years, a wide range of epidemiological studies related to drug use has been conducted, both at a national and international level. Talking about national studies in the field of school population, surveys have been conducted in the states of Colima, Nuevo León and Jalisco, as well as surveys in university population, among others. Regarding tobacco use, several studies were made and they covered many cities of the country. About household surveys, the fifth National Addictions Survey (ENA) was carried out in 2008 and it provided data at a national and state level. The Global Survey of Smoking in Adults (GATS) was also made having nationwide coverage. In relation to tobacco use, the trend shows a decrease in the prevalence of consumption. This is shown in ENA 2008 and GATS, as well as school population studies in different states. For alcohol consumption, the situation is different; both for the prevalence and for the proportion of people who start its early consumption, significant increases have been reported throughout the country. Alcohol abuse remains constant and is similar between men and women. When considering the use of illegal drugs, there is an overall increase. As for marijuana, data indicates that its consumption has increased and that it remains as the primary drug of use. However, the main increase is for inhalants, particularly among school population and especially in women. For cocaine, data from United Nations shows a significant decrease in the supply of this substance due to the increase of seizures. Data from ENA 2008 shows that the use of this drug has doubled between 2002 and 2008. The United Nations report indicates that the increase in our country is apparent until 2005 and since then it has been decreasing. Methamphetamine use remains low and it does not increase. Only in the case of the population that goes to service centers for drug users, a high rate of consumption is found. Finally, the consumption of heroin and hallucinogens is low. Chihuahua remains as the state with the most problems in the use of heroine. Most recent surveys have allowed us to see, in general, some of the trajectories in adolescent mental health, where sexual abuse is presented first in women, followed by ADDH, then the consumption of legal drugs, antisocial behavior, use of inhalants and suicide attempt. Then drug consumption, marijuana and cocaine. In men, the sequence is similar, although they face ADDH first and then sexual abuse. In this context, the objective of this study is to assess the prevalence of drug, alcohol and tobacco use, as well as consumption trends in school population from 7th to 12th grade from Mexico City and its political delegations. Method To ensure the comparability with similar studies carried out in Mexico in school population, the methodology used in this study maintains the basic aspects of the previous measurements that have been made in students from 7th to 1 2th grade from Mexico City and other states. The project had the approval of the ethics committee from the National Institute of Psychiatry Ramón de la Fuente Muñiz, and was approved by the educational authorities of Mexico City to be applied in school population. The unit of analysis from which the information was obtained were the students enrolled in 7th to 12th grade in 2008-2009 from public and private schools in Mexico City. The sampling frame was developed based on the official records of the 2008-2009 school year. A non-response rate of 20%, a confidence level of 95% and an average absolute error of 0.004 were considered. The sample design was stratified by level of education (7th to 9th grades and 10th to 12th grades) and political delegations, which gave 32 different strata. It was also clustered by scholar group which was the primary unit of selection. The sample of groups and students were weighted considering the group, educational level and the delegation. A final sample of 22 980 subjects was obtained: 49.8% were female and 50.2% were men. 56.3% of the sample attended to 7th to 9th grades and 43.7% attended to 10th to 12th grades. In addition, most of the male and female adolescents were full-time students during the year prior to the study and only 7% of men and 5.1% of women were not students. 23.3% of men and 11.9% of women worked part or full time, and additionally, most of them had both parents. The information was obtained through a standardized questionnaire, which has been applied in previous surveys and has been previously validated. Due to the extension of the instrument, four forms were used to include various sections, the main part of questionnaire was administered to all subjects and the last two pages corresponded to forms, so each form was applied to one quarter of the sample. Alcohol consumption indicators used are comparable with WHO indicators, international observatories from Europe and the ones used in <<Monitoring the Future.>> Additionally, a significant amount of risk and protective factors related to drug use was evaluated. Results Regarding tobacco use, it decreased from 48.3% to 44.3% compared to the study made in 2006, and men were the ones who had the highest percentage (45.9%) compared with women (42.6%). Additionally, the average onset age is of 12.8 years. As for the current use of tobacco the situation is similar, the percentage is higher in men than in women and is much higher among students from 7th to 9th grades than among students from 10th to 12th grades. In the case of alcohol, its consumption has increased from 68.8% to 71.4%; it was similar in women compared to the last measurement and in men it increased. The prevalence of alcohol abuse decreased from 25.2% to 23.4% compared to the previous survey. However, the students who have taken alcohol had an average onset age of 12.6 years. The problematic alcohol consumption measured with the long version of AUDIT found that in 7th to 9th grades, 1 7.1 % of men and 1 6.3% of women reported having this type of consumption. In 10th to 12th grades, 36.5% of men and 28.5% of women also reported problematic use of alcohol. Regarding dangerous alcohol consumption, 7.2% of men and 6.7% of women presented it in 7th to 9th grades. Students from 10th to 12th grades had higher percentages being of 22.5% in men and 15.3% in women. The study shows a significant increase in drug consumption: during the last three years it has raised from 17.8% to 21.5%. Within each substance use, the consumption of inhalants, marijuana, hallucinogens, and methamphetamines has increased in comparison with the study of 2006. The preference by drug type has changed slightly over the past three years; in men marijuana has the first place of preference (14%), followed by inhalants (10.8%) and in third place of preference is cocaine (4.3%). Women prefer inhalants (10.0%), followed by marijuana (8.8%) and then tranquilizers (5.6%). In terms of additional behaviors evaluated on this study, it is noteworthy that the age of first sexual intercourse decreased by almost half a year in women. All other behaviors (suicide attempt, depressive symptoms, risky eating behaviors, antisocial acts) remained equal. Discussion In this context, the study results show a widespread use of drugs in the population, with major increases specially between women. Adding the presence of other problematic behaviors related to drug use, leads us to make a reflection on the general mental health problems experienced by the population and together they give a guideline for working immediately on various preventive actions. The work made with nursery and elementary boys and girls developing strategies and social skills that enable them to increase their personal and social resources; likewise, working with parents, teachers and health personnel, through positive parenting programs, in groups and teaching them directly effective strategies for interaction and discipline with their children or students under their charge through modeling, are factors that lead to better prevention in most sectors of population. A social policy that allocates more financial and human resources aimed to support these activities must be added to these efforts, especially to support research in general and particularly to support research that leads to develop optimal prevention practices for new generations. Therefore, the importance of translating these elements into action lies in the possibility of having healthier generations and a society with better expectations, approaches and opportunities for growing.

Introducción En los últimos tres años, se ha realizado una amplia gama de estudios epidemiológicos, a nivel nacional e internacional, sobre el consumo de drogas. En cuanto a tabaco, la Encuesta Nacional de Adicciones 2008, la encuesta de GATS y los estudios estatales en población escolar muestran una tendencia importante a la disminución del consumo de la sustancia. Para el consumo de alcohol, tanto en la prevalencia como en la proporción de personas que inicia su consumo temprano, se han reportado incrementos. El abuso de alcohol se mantiene constante y similar entre hombres y mujeres. Al considerar el uso de drogas ilegales hay incrementos importantes. El incremento más pronunciado es el de los inhalables, especialmente en mujeres. En cuanto a la cocaína, la ENA 2008 señala que se ha duplicado el consumo y el informe de la ONU indica que al parecer el incremento se da hasta 2005 y a partir de ahí ha disminuido. Las metanfetaminas mantienen una prevalencia baja. Sólo entre quienes acuden a los centros de servicio para usuarios de drogas se encuentra un alto consumo. En este contexto, el objetivo de este trabajo es evaluar las prevalencias del uso de drogas, alcohol y tabaco, así como las tendencias de consumo en la población de estudiantes de enseñanza media y media superior de la Ciudad de México. Método El marco muestral se elaboró con base en los registros oficiales del ciclo escolar 2008-2009 de la Secretaría de Educación Pública (SEP). Se consideró una tasa de no respuesta de 20%, un nivel de confianza de 95%, con un error absoluto promedio de 0.004. El diseño de la muestra fue estratificado y por conglomerados; la unidad de selección fue el grupo escolar. Se obtuvo una muestra final de 22 980 sujetos y quedó conformada por 49.8% de mujeres y 50.2% de hombres. La información se obtuvo mediante un cuestionario estandarizado, que ha sido aplicado y validado en las anteriores encuestas. Los indicadores de consumo de alcohol, drogas y tabaco empleados son comparables con los indicadores de la OMS, de los observatorios internacionales de Europa y de los usados en <<Monitoring the Future>>. Resultados Con lo que respecta al tabaco, el consumo disminuyó de 48.3 a 44.3% y son los hombres quienes tienen el porcentaje más alto (45.9%) en comparación con las mujeres (42.6%). La edad de inicio promedio es de 12.8 años. En el caso del alcohol, el consumo se ha incrementado de 68.8 a 71.4%; se mantuvo similar en las mujeres y en los hombres se incrementó. En cuanto al consumo problemático del alcohol, medido con el AUDIT versión larga, se encontró que en secundaria, 1 7.1 % de los hombres y 16.3% de las mujeres reportaron tener este tipo de consumo. Para el bachillerato, 36.5% de los hombres y 28.5% de las mujeres reportaron un consumo problemático de alcohol. El estudio señala un incremento importante en el consumo de drogas en los últimos tres años, que de 1 7.8% ha pasado a 21.5%. Al interior de cada sustancia se observa que se ha incrementado el consumo de inhalables, mariguana, alucinógenos y metanfetaminas con respecto a 2006. En este contexto, la preferencia por tipo de droga ha cambiado ligeramente en los últimos tres años, de manera que en los hombres el primer lugar lo ocupa la mariguana (14%), seguido por los inhalables (10.8%) y en tercer lugar la cocaína (4.3%). Las mujeres prefieren los inhalables (10.0%), la mariguana (8.8%) y finalmente los tranquilizantes (5.6%). Discusión Los resultados indican un consumo de drogas importante en la población, con incrementos mayores en las mujeres, lo que debe dar pauta para trabajar inmediatamente en diversas acciones preventivas. El trabajo con los niños/as de preescolar y primaria, desarrollando estrategias y habilidades sociales para incrementar sus recursos personales y sociales, así como el trabajo con padres, maestros y personal de salud, en programas de parentalidad positiva, enseñando por medio del modelamiento estrategias efectivas de interacción y disciplina a sus hijos/as o estudiantes, son elementos que conducirán a una mejor prevención en diversos ámbitos y en la mayoría de los sectores de la población.

Introduction Since three years from now, in Mexico there has been several surveys and specific research regarding drug use. Over these years the national surveillance systems databases (SISVEA, CIJ) have shown that cocaine use has stabilized and marijuana use is still increasing, although there are some regional differences. Also, the results of the 2003 Mexico City Students' Survey revealed a similar inclination: an increase on marijuana use, a slight diminish on cocaine use and as a new stage: a rebound on inhalant use. However, these changes and trends on drug use are not the same all over the country. The results found in these databases suggest that the northern border behaves differently from the rest of the country, even all along the northern border itself. While drug use in Matamoros is lower than in other border cities, Nuevo Laredo, Reynosa and Ciudad Juarez registered high cocaine and heroin use. On the other hand, even though the border cities of Sonora and Baja California have these same drug use problems, they also show high rates of methamphetamine use. Another important issue on border cities is that Ciudad Juarez has reached Tijuana's use levels, mainly among teens between 12 and 1 7 years old. These two cities have the highest substance use levels in the country, even above Mexico City. On the central region of the country, the drug use rates are halfway between. Even though Mexico City's drug use levels are among the central region and the two border cities mentioned before, in all the states that have been studied, there's been a general significant increase in drug use. In southern states, especially Yucatan (where there's a household and a students' survey), the drug rates are the lowest in the country. However, the women's drug use rates keeps increasing. Specifically the 2003 students' survey showed that in some Mexico City's counties women have higher alcohol and tobacco prevalence, and their illegal drug use trends begin to be alike to men's illegal drug use trends. Objective To present drug use prevalence results from the 2006 Mexico City Students Survey. Material and methods This survey used a 10523 Mexico City students random sample. The sample design was stratified (by county), with two stages (by school) and clustered (by groups). This data is representative by State County and by educational level. The design is comparable with previous student's surveys made by the National Psychiatric Institute (INP) and the Mexican Board of Education (SEP). The marijuana, cocaine and inhalants variation coefficients (VC) were determined according to the 2003 survey. The variable with the highest VC, a non-response rate and a design effect of two were considered as in previous surveys. With all these parameters, it was considered a 15% non-response rate, the same found in previous studies. The sample's accuracy level was 95%, with an absolute error average of 0.004. The questionnaire was made with drug use indicators that the World Health Organization used in their own surveys. Besides, some youth behaviors were explored: suicide attempt, depression, eating risk behaviors, sexual behavior, etc. Results From this sample 49.9% were women and 50.5% male. As for Tobacco <<Ever use>>, it affected the same both men and women, and remained similar in comparison to 2003. Also, 68.8% of the adolescents have consumed alcohol at least once in their life and 41.3% has drunk it in the previous month, being women and men equally behaved. The total drug use prevalence was 1 7.8%, statistically higher than in the 2003 survey, with a 2.6% difference. Men use more drugs compared to women. Of the total sample, 12.9% is an experimental user and 4.9% is a regular user (have used drugs five or more times). As for medical drugs (tranquillizers and amphetamines), their use is higher in women, while illegal drugs use (marijuana, cocaine, hallucinogens, inhalants, methamphetamine and heroin) is higher in men. In general terms, illegal drug use is higher than medical drugs use. Substance use percentage was nearly twice for tenth to twelfth grade students, compared to seventh to ninth grade students. Women have experimented less with illegal drugs in the 'previous year of use' than men, yet women have shown an important increase on inhalant and marijuana use over the past three years, and cocaine use has remained similar. Marijuana is the first choice drug among adolescents, followed by inhalants, tranquillizers in third place and cocaine in fourth place of choice. Also, the results show that drug use is highly related with other problematic behaviors like suicidal attempt, depressive sintomatology, antisocial behavior, and sexual risk behaviors. Conclusions The study points out an important increase in drug use over the past three years, going from 15.2% to 17.8%. Different trends can be seen on each substance. On the one hand, marijuana and inhalants use has increased widely, on the other hand tranquillizers use remains stable and cocaine use has decreased. These results showed that the illegal drugs use among both men and women has increased (marijuana and inhalants mostly), women's cocaine use has remained steady, but men's has been reduced. Legal drugs use behavior hasn't changed: the use of alcohol has enhanced, while tobacco use is similar to the 2003 survey. It has also been reported that the use rate of both substances is practically the same among men and women. Also, the situation of México City has changed slightly. The counties that are more damaged by drug use are: Azcapotzalco, Cuauhtémoc, Benito Juárez, Coyoacán and Tlalpan. In order to improve drug use prevention programs to consider the relationship between several problematic behaviors like suicidal attempt or antisocial behavior, because users showed prevalence at least twice more than non users. Likewise, there still exist a low risk perception and a high tolerance towards tobacco and alcohol use, which are important risk factors for using other drugs. Additionally, if we also take into account that the first use takes place a younger age, the probabilities of using medical and illegal drugs increase significantly.

Introducción Desde hace tres años se han hecho varias encuestas sobre consumo de drogas en nuestro país, además de investigaciones específicas sobre el tema. En estos últimos tres años diversos sistemas de información del país (SISVEA, CIJ) han mostrado que el consumo de cocaína se ha estabilizado y que el consumo de mariguana sigue en aumento, aunque estos aspectos presentan variaciones a nivel regional. Asimismo, en los datos de la encuesta de estudiantes de la Ciudad de México del 2003, se encontró una situación similar, hubo un incremento en el consumo de mariguana, un ligero decremento en el consumo de cocaína y, como nueva situación, un repunte en el consumo de inhalables. Por supuesto que los cambios y comportamientos no son iguales en todo el país. Por otra parte, se ha observado que las mujeres han incrementado su consumo de drogas de manera específica. Por ejemplo, el reporte de la encuesta del 2003 muestra que en los casos del alcohol y del tabaco, en algunas delegaciones de la Ciudad de México hay una mayor prevalencia de mujeres que consumen estas sustancias y hay indicios de que en el consumo de algunas drogas ilegales las prevalencias del consumo son similares a las de los hombres. Objetivo El objetivo de este estudio fue el de presentar los resultados de la Encuesta del 2006 sobre las prevalencias del uso de drogas entre la comunidad escolar en la Ciudad de México. Material y métodos El estudio se realizó con una muestra aleatoria de 10 523 estudiantes de todo el Distrito Federal. Los datos de este estudio son representativos por delegación y por nivel educativo, y el diseño es comparable al de estudios anteriores realizados en escuelas por el Instituto Nacional de Psiquiatría Ramón de la Fuentes Muñiz y la Secretaría de Educación Pública. El cuestionario se conformó con los indicadores de consumo de drogas que se han utilizado en este tipo de estudios que corresponden a los empleados por la OMS. Además, se exploraron diversas conductas de los adolescentes, como el intento suicida, su nivel de depresión y sus conductas alimentarias de riesgo, así como diversos aspectos de su conducta sexual. Resultados Del total de la muestra el 49.5% fueron mujeres y el 50.5% fueron hombres. En los resultados se encontró que el consumo de tabaco alguna vez en la vida ha afectado de modo similar tanto a hombres como a mujeres y fue similar a lo encontrado en el 2003. Por otro lado, se encontró que el 68.8% de los/as adolescentes ha usado alcohol alguna vez en su vida y un 41.3% lo ha consumido en el último mes; resultando igualmente afectados tanto los hombres como las mujeres. La prevalencia total de consumo de drogas fue del 1 7.8%, porcentaje estadísticamente mayor al del 2003 en un 2.6%. Los hombres estuvieron dentro del subgrupo más afectado por el consumo actual en comparación con las mujeres. De acuerdo al nivel educativo de los participantes, el consumo de sustancias fue casi del doble para los/as adolescentes de escuelas de bachillerato, como para los de bachillerato técnico, en comparación con los/as de secundaria. En cuanto a las drogas ilegales, en el consumo durante el último año, una proporción menor de mujeres ha experimentado con drogas -en ellas se ha observado, en los últimos tres años, un incremento importante en el consumo de inhalables y mariguana- en tanto que el consumo de cocaína se ha mantenido estable. Por lo que respecta a cada sustancia, la mariguana ocupa el primer lugar de preferencia entre los/as adolescentes, le sigue el consumo de inhalables, los tranquilizantes en tercer lugar y la cocaína en cuarto. Conclusiones El estudio mostró un incremento importante en el consumo de drogas en los últimos tres años: del 15.2% ha pasado a 17.8%. Además, dentro del uso de cada sustancia se observan situaciones distintas. Por un lado, el incremento del uso de la mariguana y de los inhalables es grande, mientras que en los tranquilizantes el consumo se mantiene estable y el de la cocaína ha disminuido. Al analizar estos resultados según el sexo, se encontró que los niveles de consumo de drogas ilegales (mariguana e inhalables principalmente), en las mujeres, han aumentado y la cocaína se ha mantenido estable: en tanto que en los hombres también se han incrementado las dos primeras sustancias, pero el consumo de cocaína ha disminuido. Por lo que respecta a las drogas legales, la dinámica se mantiene similar. Por un lado, el consumo de alcohol se ha incrementado en tanto que el consumo de tabaco se mantiene similar al del 2003. Las delegaciones más afectadas por el consumo de drogas son Azcapotzalco, Cuauhtémoc, Benito Juárez, Coyoacán y Tlalpan, las cuales han desplazado a Gustavo A. Madero, Venustiano Carranza, Iztacalco y Miguel Hidalgo. En el caso del abuso del alcohol, también han cambiado las delegaciones más afectadas, actualmente son Miguel Hidalgo, Cuauhtémoc, Benito Juárez, Cuajimalpa y Tlalpan. Al analizar la relación del consumo de drogas con otras conductas problemáticas se observa que los y las usuarias de drogas, han presentado de dos a tres veces más sintomatología depresiva, intento suicida, conductas antisociales, así como un posible trastorno por déficit de atención.