Resumen ANTECEDENTES: Los leiomiomas son neoplasias benignas comunes durante la edad reproductiva. Su aparición en adolescentes es excepcional y un reto diagnóstico en menores de 18 años de edad. El caso aquí reportado se integra a los 26 casos asentados en la bibliografía y se trata del tumor más grande en la paciente más joven hasta ahora comunicado. CASO CLÍNICO: Paciente de 14 años, con inicio de sangrado uterino anormal, aumento del perímetro abdominal y tres semanas con hipermenorrea. El reporte inicial de la química sanguínea informó: anemia severa y el ultrasonido pélvico: un gran tumor anexial sólido. Luego de mejorar las condiciones hemodinámicas de la paciente por medio de transfusiones de concentrados eritrocitarios se practicó una laparotomía exploradora y se extirpó un leiomioma gigante, dependiente del útero. El informe histopatológico fue de: leiomioma de 16 cm de diámetro, con degeneración roja. La paciente cursó sin complicaciones posquirúrgicas y hasta la actualidad no ha experimentado datos de recurrencia ni sangrado uterino anormal. CONCLUSIÓN: La fisiopatología de la miomatosis uterina sigue aún sin comprenderse del todo. El tratamiento quirúrgico a una edad temprana debe tomar en consideración el deseo de embarazo y llevar a cabo un seguimiento estrecho para valorar: la fertilidad, recurrencia, atipia celular y trastornos menstruales.

Abstract BACKGROUND: Leiomyomas are common benign neoplasms during reproductive age. Its appearance in adolescents is exceptional and a diagnostic challenge in children under 18 years of age. The case reported here is one of the 26 cases reported in the bibliography and it is the largest tumor reported in the youngest patient to date. CLINICAL CASE: A 14-year-old patient with onset of abnormal uterine bleeding, increased abdominal circumference and three weeks with hypermenorrhea. Initial blood chemistry report: severe anemia and pelvic ultrasound: a large solid adnexal tumor. After improving the patient’s hemodynamic conditions through transfusions of erythrocyte concentrates, an exploratory laparotomy was performed and a giant leiomyoma, dependent on the uterus, was removed. The histopathological report was: leiomyoma of 16 cm in diameter, with red degeneration. The patient had no postoperative complications and to date she has not experienced recurrence or abnormal uterine bleeding. CONCLUSION: The pathophysiology of uterine fibroids remains poorly understood. Surgical treatment at an early age should take into account the desire for pregnancy and carry out a close follow-up to assess: fertility, recurrence, cellular atypia and menstrual disorders.

Abstract Objectives The present study aimed to evaluate the measurement invariance of a general measure of the perception of governmental responses to COVID-|19 (COVID-SCORE-10) in the general population of 13 Latin American countries. Methods A total of 5780 individuals from 13 Latin American and Caribbean countries selected by non-probabilistic snowball sampling participated. A confirmatory factor analysis was performed and the alignment method was used to evaluate invariance. Additionally, a graded response model was used for the assessment of item characteristics. Results The results indicate that there is approximate measurement invariance of the COVID-SCORE-10 among the participating countries. Furthermore, IRT results suggest that the COVID-SCORE-10 measures with good psychometric ability a broad spectrum of the construct assessed, especially around average levels. Comparison of COVID-SCORE-10 scores indicated that participants from Cuba, Uruguay and El Salvador had the most positive perceptions of government actions to address the pandemic. Thus, the underlying construct of perception of government actions was equivalent in all countries. Conclusion The results show the importance of initially establishing the fundamental measurement properties and MI before inferring the cross-cultural universality of the construct to be measured.

Abstract Objective: Compare the different definitions for bladder outlet obstruction (BOO) in women with dysfunctional voiding (DV) and find which one is most specific and sensitive to achieve a more accurate diagnosis. Materials and methods: A cross-sectional study of urodynamic investigation studies from women diagnosed with DV in a period from 2017-2020 were classified with obstruction or not, based on 6 urodynamic definitions. The control group were women who had been categorized with obstruction in at least 3 definitions of BOO. Likelihood positive ratio, sensitivity and specificity were calculated. Statistical analysis was carried out by IBM SPSS Statistics for Windows, Version 23.0 (IBM Corp., Armonk, N.Y., USA). A p <0.5 was considered statistically significant. Results: A total of 146 urodynamic studies were analyzed, Solomon-Greenwell nomogram has shown to be the more specific and sensitive, obtaining the highest likelihood positive ratio >100. The comparison between our the control group and every definition of BOO has shown statistically significant difference. Conclusions: The diagnosis of BOO requires expertise and individualization, it is made through physical examination and complete urodynamic study, Solomon-Greenwell has shown to be specific and sensitive for diagnosis in the group of study.

Resumen Objetivo: Comparar las diferentes definiciones que existen para definir la obstrucción del tracto de salida en la mujer y encontrar cuál es la más específica y sensible para un mejor manejo de estas pacientes. Material y métodos: Se analizaron estudios urodinámicos de mujeres con diagnóstico de disfunción del vaciamiento, fueron clasificados como obstruidas y no obstruidas de acuerdo con cada definición de obstrucción del tracto de salida, se compararon con un grupo control que consistía en estudios que resultaron obstruidos con al menos 3 definiciones diferentes. Se llevó acabo un análisis estadístico de razón de verosimilitud. Resultados: El nomograma de Solomon-Greenwell ha resultado ser la definición más específica y sensible, obteniendo la mayor razón de verosimilitud >100. Conclusiones: El diagnóstico de obstrucción del tracto de salida requiere un estudio complete e individualizado, a través de un examen físico y de estudios urodinámicos completos.

Abstract Psychology and neuroscience offer new perspectives to understand consumer and economic behaviour. Neuroeconomics provides a new frame of reference to understand the way in which the neuroanatomical structures of the brain are involved in the financial decisions of people. Currently, measurement scales are an application alternative to assess people's executive functions and cognitive inhibition quickly. In the present study for the evaluation of cognitive inhibition we will use the Stroop Test (Golden, 1994), which examines the cognitive processes associated with cognitive flexibility; the interference resistance from external stimuli and its effect on behaviour. The plates that make up the Stroop test present different possibilities for analysis and interpretation. Within neuroeconomics, there is an area that investigates how cognitive and affective regulation is critical to achieve economic results, in addition to investigating the problems caused by consumption and spending that people have in their daily lives. There is research shown that individuals who make compulsive purchases show cognitive deficiencies and difficulties in inhibiting their responses. Furthermore, compulsive purchases correlate with financial executive functioning, particularly with impulse control, organization and planning, showing that compulsive purchases are not limited only to impulse control. In Latin America and particularly in Mexico, there are few studies on neuroeconomics or consumer neuroscience, so consider that this research is an innovative contribution to the subject in our region. In this context, the objective of the research is to identify the association between cognitive inhibition and the money university students spend. This research evaluated the association between cognitive inhibition and the money university students spend. A total of 40 university students participated, 47.5 % men and 52.5 % women, between 18 and 25 years, from the City of Querétaro, Mexico. Cognitive inhibition was evaluated with the Stroop Test. In addition, sociodemographic data and monthly expenses were asked. The results descriptively detailed the level of youth spending and the Stroop effect variables. Young people have mean scores in Word, Colour, Word - Colour and Interference, according to the established parameters. Regarding monthly expenses, it is observed that on average they spend $ 666 Mexican pesos (34.04 USD / 31.13 EUR). In addition, a deficit was found in the inhibitory control related to an increase in the level of expenditure made by university students, that is, those who spend and buy more have difficulties in their cognitive inhibition (self-control). Inhibitory control is associated with age and this time with the level of money spent. Additionally, the inhibition processes allows us to assume certain activity in the orbitofrontal cortex (OFC) and the dorsolateral prefrontal cortex (DLFC), while they are ready to spend and who has problems with the control of their money, they cannot realize the excessive expenses that it does not recognize the symptoms that drive it to compulsive buying. The findings provide evidence to the neuroeconomy, as well as to the posture of cognitive control. Furthermore, it is corroborated that performance tests are an alternative in the detection of executive functioning deficiencies in a short time of application and provide evidence in the approach to neuroeconomics through this form of measurement. This offers a novel vision to understand the personal finances of Mexicans and their economic behaviour. Financial and consumer behaviour has become our main line of research from a neuroeconomic perspective; in the future, we intend to continue this study by incorporating affective and neurobehavioral factors involved in financial decisions in young people of our country. Finally, the usefulness of the results within the neuroeconomics in Mexico and Latin America is deepened, as well as its contribution as a line of research.

Resumen La psicología y las neurociencias ofrecen nuevas perspectivas para comprender el comportamiento económico y del consumidor. La neuroeconomía provee un nuevo marco de referencia para comprender la forma en la que las estructuras neuroanatómicas del cerebro se encuentran implicadas en las decisiones financieras de los individuos. En este contexto, el objetivo de la investigación es identificar la asociación entre la inhibición cognitiva y la cantidad de dinero que gastan los universitarios. Participaron 40 jóvenes universitarios, 47.5 % hombres y 52.5 % mujeres, entre 18 y 25 años, de la Ciudad de Querétaro, México. La inhibición cognitiva se evaluó con el Test de Stroop. Además, se preguntó sobre datos sociodemográficos y los gastos mensuales. Los resultados muestran descriptivamente el nivel de gasto de los jóvenes y las puntuaciones del efecto Stroop. Los jóvenes tienen puntuaciones medias en Palabra, Color, Palabra - Color e Interferencia, acorde a los parámetros establecidos. Respecto al gasto mensual se observa que, en promedio, gastan $ 666 pesos mexicanos (34.04 USD / 31.13 EUR). Adicionalmente, se encontró un déficit en el control inhibitorio relacionado con un aumento en el nivel de gasto realizado por los estudiantes universitarios, es decir, aquellos que gastan y compran, en mayor medida presentan dificultades en su inhibición cognitiva (autocontrol). El control inhibitorio se asoció con la edad y esta, a su vez, con el nivel de dinero gastado. Por último, se profundiza en la utilidad de los resultados dentro de la neuroeconomía en México y demás países latinoamericanos, así como su aporte como línea de investigación.

Abstract Objective: To identify preoperative risk factors associated with major complications in patients with xanthogranulomatous pyelonephritis undergoing total nephrectomy. Method: Retrospective analysis of patient's charts with xanthogranulomatous pyelonephritis who underwent nephrectomy. Risk factors included for analysis were gender, body mass index, Charlson comorbidity index, American Society of Anesthesiologists physical status classification, Malek's stage, leukocyte count and creatinine levels. Postoperative complications were stratified in minor and major according to Clavien-Dindo's classification. Univariate and bivariate analysis using Fisher's exact test, Pearson's chi-squared and odds ratio (OR) was performed. Results: 72 patients were analyzed, 83% women, mean age of 50 years, 58.3% positive urine cultures and 66% kidney stones. Major complications were present in 32% of cases, and 15% were admitted to the intensive care unit. Elevated creatinine (OR: 3.8; 95% confidence interval [95%CI]: 1.1-13; p = 0.02) and Malek's stage II to III (OR: 4.5; 95%CI: 1.2-17.5; p = 0.02) were associated with major complications. Conclusion: The Malek Stage and elevated creatinine increases the risk of major complications in patients undergoing nephrectomy due to xanthogranulomatous pyelonephritis.

Resumen Objetivo: Identificar factores de riesgo asociados a complicaciones mayores en pacientes con pielonefritis xantogranulomatosa sometidos a nefrectomía. Método: Análisis retrospectivo de expedientes clínicos de pacientes con pielonefritis xantogranulomatosa sometidos a nefrectomía. Se analizaron el sexo, el índice de masa corporal, el índice de comorbilidad de Charlson, la clasificación del estado físico de la American Society of Anesthesiologists, la etapa de Malek, el conteo leucocitario y los valores de creatinina. Las complicaciones se estratificaron en menores y mayores según la clasificación de Clavien-Dindo. Se realizó análisis univariado y bivariado usando las pruebas exacta de Fisher y ji al cuadrado de Pearson, y se establecieron medidas de riesgo utilizando la odds ratio (OR). Resultados: Se analizaron 72 pacientes con una edad media de 50 años, el 83% mujeres, el 58.3% con urocultivo positivo y el 66% con litiasis renal. El 32% tuvieron alguna complicación mayor y el 15% requirieron admisión a la unidad de cuidados intensivos. Los valores elevados de creatinina (OR: 3.8; intervalo de confianza del 95% [IC95%]: 1.1-13; p = 0.02) y la etapa Malek II-III (OR: 4.5; IC95%: 1.2-17.5; p = 0.02) se asociaron con complicaciones mayores. Conclusión: El estadio de Malek y los valores elevados de creatinina incrementan el riesgo de desarrollar complicaciones mayores en los pacientes con pielonefritis xantogranulomatosa sometidos a nefrectomía.

ABSTRACT Purpose To review current literature regarding sacral neuromodulation (SNM) for neurogenic lower urinary tract dysfunction (NLUTD) focused on indications, barriers and latest technological developments. Material and Methods A PubMed database search was performed in April 2020, focusing on SNM and various neuro-urological conditions. Results SNM has been increasingly indicated for lower urinary tract dysfunction (LUTD) in neuro-urological patients. Most studies are cases series with several methodological limitations and limited follow-up, lacking standardized definition for SNM clinical success. Most series focused on neurogenic overactive bladder in spinal cord injured (incomplete lesions) and multiple sclerosis patients. Barriers for applying this therapy in neurogenic LUTD were mainly related to magnetic resonance imaging incompatibility, size of the implantable pulse generator (IPG), and battery depletion. Newer technological advances have been made to address these limitations and will be widely available in the near future. Conclusions SNM seems a promising therapy for neurogenic LUTD in carefully selected patients with incomplete lesions. Further studies are still needed to define which subgroups of neurological patients benefit the most from this minimally invasive technique.

Abstract The objective of this research was to describe the risk behavior eating and analyze differencces in sensatión seeking into risk disorder eating. A questionnaire was used that included risk eating behaviors and sensation seeking inventory. A sample was use formed by 1012 youths between 14 and 22 (mean 16.7) years old, in México City. The results revealed that the woman concern about weight, vomit, fast, make restrictive dieting and use pills for weight reduce, a difference of the man, this make binge eating, lose self- control for eating, more than the woman. The youths male and female with high nutritional risk have higher levels in sensations seeking. The discussion analyzes the utility for prevent eating disorders in youths and identify the sensation seeking as a risk factor for eating behavior within the nutrition and health programs.

Resumen Los objetivos de la presente investigación son describir las conductas alimentarias, así como comparar la búsqueda de sensaciones en diferentes niveles de riesgo alimentario. Se midieron las conductas alimentarias de riesgo y la búsqueda de sensaciones. Se seleccionó una muestra no probabilística de tipo intencional de 1012 jóvenes, de entre 14 y 22 años de edad (M = 16.7). Los resultados mostraron que las mujeres se preocupan más por su peso, vomitan, ayunan, hacen dieta y usan pastillas para perder peso, en comparación con los hombres, quienes practican más atracones y tienen una mayor falta de control al comer que las mujeres. Además, quienes presentan alto riesgo alimentario tienen mayores niveles de búsqueda de sensaciones. La discusión analiza la utilidad de lo encontrado para prevenir los problemas alimentarios en los jóvenes, así como identificar a la búsqueda de sensaciones como un factor de riesgo del comportamiento alimentario dentro de los programas de nutrición y salud.

Abstract Charts are a visual aid that is used in articles in order to highlight the results of an investigation. They allow illustrating the results with the purpose of making them clearer. Charts, just like statistical tests, are selected based on the objective of the study, the types of variable, and the statistical analyzes to be illustrated. Some of the most commonly used charts in clinical practice are frequency histograms, which illustrate qualitative variables or frequencies; also error charts, that are used for normally distributed quantitative variables; box plots or violin plots are used for distribution-free quantitative variables, and survival curves are for variables that include the person-time variable. The aforementioned charts can be used to illustrate the comparisons between maneuvers and outcome depending on the type of variable that is being analyzed. When two groups are compared and the dependent variable is dichotomous, forest plots are used; for multivariate models, the chart depends on the type of analysis. As for logistic regression and linear regression, tree diagrams are used; and scatter plots are used for linear regression. Survival plots are used for Cox proportional hazards. Although charts can be very useful, if they are misused, they can show differences where there are none, which leads to a misinterpretation of the studies. In this article, we will use examples to complement the topics that were previously addressed in the articles of this series.

Resumen Los gráficos constituyen una ayuda visual que usan los artículos para resaltar los resultados de una investigación. Estos permiten ilustrar los resultados con el fin de hacerlos más claros. Los gráficos, al igual que las pruebas estadísticas, se seleccionan a partir del objetivo del estudio, de los tipos de variable y de los análisis estadísticos que se desee ilustrar. Algunos de los gráficos más usados en la práctica clínica son los histogramas de frecuencia que ilustran las variables cualitativas o frecuencias, los gráficos de error se usan para variables cuantitativas con distribución normal, el gráfico de cajas o gráfico de violín para variables cuantitativas de libre distribución y las curvas de supervivencia para las variables que incluyen la variable tiempo/persona. Estos mismos gráficos pueden ser usados para ilustrar las comparaciones entre maniobras y desenlace dependiendo del tipo de variable que se analice. Cuando se comparan dos grupos y la variable dependiente es dicotómica se usan gráficos de bosque. Para los modelos multivariados los gráficos dependen del tipo de análisis, en el caso de la regresión logística se utilizan gráficos de árbol y para la regresión lineal, de dispersión; y para los riesgos proporcionales de Cox, gráficos de supervivencia. Si bien los gráficos son de gran utilidad, mal utilizados pueden mostrar diferencias donde no las hay, provocando una errónea interpretación de los estudios. En este artículo complementaremos con ejemplos los temas abordados con anterioridad en los artículos de esta misma serie.

Resumen La toma de decisiones del consumidor es parte del proceso de compra. Por tanto, al ser un elemento relevante para la evaluación del proceso de compra, es esencial contar con mediciones válidas, confiables y culturalmente relevantes. Por esta razón, en este artículo se presenta el desarrollo y validación del inventario de toma de decisiones de compras (ITDC). La muestra general estuvo conformada por 518 participantes mexicanos, la cual se dividió aleatoriamente en dos, 300 para análisis exploratorios y 218 para análisis confirmatorios. Los resultados muestran que el ITDC, evaluado a partir de sus componentes generales de decisiones emocionales y razonadas en las compras, presenta altos índices de consistencia interna. El análisis factorial confirmatorio muestra buen ajuste a las dimensiones extraídas en los análisis exploratorios. En términos de validez convergente, divergente y discriminante, se encontraron relaciones según la red nomológica, y los factores mostraron independencia. Por último, a partir de las estructuras confirmadas del inventario, se modeló el gasto por semana. Encontrando que las decisiones emocionales resultan ser un predictor significativo positivo. ITDC es una herramienta de evaluación con relevancia cultural e índices psicométricos apropiados, que se pueden utilizar para integrar en modelos de comportamiento del consumidor.

Abstract Consumer decision-making is part of the purchase process. Therefore, as a relevant element for the evaluation of the purchase process, it is essential to have valid, reliable and culturally relevant measurements. For that reason, in this study the development and validation of the Purchases Decision-Making Inventory (PDMI) are presented. The general sample consisted of 518 Mexican participants, which were randomly divided into two groups, 300 for exploratory analysis, and 218 for confirmatory analysis. The results show that PDMI evaluated from its general components of emotional and reasoned decisions in purchases, present high internal consistency. The confirmatory factor analysis shows a good fit to dimensions extracted from the exploratory analyses. In terms of convergent, divergent, and discriminant validity, relations according to the nomological network were found, and the factors showed independency. Finally, from the confirmed structures of the inventory, spending per week was modelled, finding that emotional decisions turned out to be a positive significant predictor. PDMI is an evaluation tool with cultural relevance and appropriate psychometric indexes that can be used to integrate into consumer behavior models.

ABSTRACT Consumption of sugar sweetened beverages (SSB) in Mexico is one of the highest in the world, which represents a risk factor for the development of obesity and metabolic diseases. In the present study we used the Theory of Planned Behavior (TPB) to identify cognitive factors associated with the frequency of SSB consumption in Mexican young adults. We studied a sample of 261 people, 110 men and 151 women, from 18 to 45 years of age (M = 22.51, SD = 4.2). Participants completed consumption frequency questionnaires and instruments based on TPB. Two independent and significant predictors of consumption frequency were found: low self-efficacy and intention. Both factors explained 27.3% of the variance in consumption frequency. These results contribute to the understanding of the cognitive factors underlying SSB consumption, and suggest that high consumption frequency is a non-rational behaviour. It is possible that affective and motivational aspects could also be involved, which should be clarified with more research, in order to explore alternatives for the prevention and treatment of unhealthy consumption of beverages that are a risk to human health.

RESUMEN En México, el consumo de bebidas endulzadas o refrescos es uno de los más altos a nivel mundial, esto representa un factor de riesgo para el desarrollo de obesidad y enfermedades metabólicas. En este estudio empleamos la Teoría de la Conducta Planeada (TCP) para identificar factores cognitivos asociados a la frecuencia de consumo de refrescos en adultos jóvenes mexicanos. Estudiamos una muestra de 261 personas, 110 hombres y 151 mujeres, de 18 a 45 años de edad (M= 22.51; DE = 4.2). Los participantes completaron cuestionarios de frecuencia de consumo e instrumentos basados en la TCP. Se encontraron dos factores predictores independientes y significativos de la frecuencia de consumo, el principal fue la baja autoeficacia, seguido por la intención. Ambos factores explican el 27.3% de la varianza de la frecuencia de consumo. Estos resultados contribuyen a entender los factores cognitivos involucrados en el consumo de refrescos, y sugieren que la alta frecuencia de consumo es una conducta no racional, por lo que podrían estar implicados aspectos afectivos y motivacionales, lo que deberá ser dilucidado con más investigación que permita explorar nuevas alternativas para el desarrollo de programas de prevención y tratamiento del consumo de bebidas con riesgo para la salud humana.

Abstract Introduction: Flexible ureteroscopy and laser fragmentation (FURSL) is a minimally invasive modality for surgical treatment of renal stones. Inadequate selection of patients for this treatment generates a cost-effectiveness unbalance. Objective: To know the stone-free rate predictors in a single surgical time in patients undergoing FURSL. Method: Retrospective cohort of patients undergoing FURSL. Global and gender-categorized univariate and multivariate (logistic regression) analyses were performed to identify stone-free predictors at first FURSL. Results: Stone-free rate at first FURSL was 73.62%. Predictors in males were patient age and stone size, density and multiplicity; in females, body mass index and multiplicity of stones. Conclusions: Stone-free rate predictors at first FURSL are different in males and females. Women with overweight and obesity probably have easy-to-fragment and easy-to-extract stones associated with uric acid.

Resumen Introducción: La ureteroscopia flexible con litotricia láser (URSLL) es una modalidad mínimamente invasiva de tratamiento quirúrgico de cálculos renales. La selección inadecuada de pacientes para este procedimiento genera un desbalance de costo-efectividad. Objetivo: Conocer los factores predictores de estado libre de litos en un solo tiempo quirúrgico en pacientes sometidos a URSLL. Método: Cohorte retrospectiva de pacientes sometidos a URSLL. Se realizó un análisis univariado y multivariado (regresión logística) de los predictores de estado libre de cálculos en la primera URSLL, global y categorizado por sexo. Resultados: EL estado libre de cálculos en la primera URSLL fue de 73.62 %. Los predictores de estado libre de cálculos en hombres fueron edad y tamaño, densidad y multiplicidad del cálculo; en las mujeres, el índice de masa corporal y la multiplicidad del cálculo. Conclusiones: Los factores pronósticos de estado libre de cálculos en la primera URSLL son distintos en hombres y mujeres. Las mujeres con obesidad y sobrepeso probablemente tengan cálculos de fácil fragmentación y extracción asociados con ácido úrico.

Abstract: Background This research determines the level of prediction of sensation seeking and self-efficacy on sexual risk behaviors in young Mexicans. The sensations seeking and self-efficacy have a combined impact on the risk sexual behaviors of young people. Method The sensation seeking and selwef-efficacy were measured with two different scales in a non-probabilistic sample of 1012 young people, between 14 and 22 years old, from Mexico City. Results showed that three facets of the sensation seeking and two dimensions of self-efficacy have a direct incidence in the sexual risk behavior of young people consistent with the postulated hypothesis and that in combination explain 19.2% of the variance. Conclusions consider the combined effect of the search for sensation seeking and self-efficacy, as well as the practical implications for the development of preventive programs on sexual risk behavior in young people.

Resumen: Antecedentes La presente investigación determina el nivel de predicción de la búsqueda de sensaciones y la autoeficacia sobre la conducta sexual de riesgo en jóvenes mexicanos. Se plantea que la búsqueda de sensaciones y la autoeficacia tienen una incidencia combinada en el comportamiento sexual de riesgo de los jóvenes. Método Se midieron la búsqueda de sensaciones y la autoeficacia con dos escalas diferentes en una muestra no probabilística de 1012 jóvenes, entre 14 y 22 años, de la Ciudad de México. Resultados mostraron tres facetas de la búsqueda de sensaciones y dos dimensiones de la autoeficacia, tienen una incidencia directa en la conducta sexual de riesgo de los jóvenes consistente con la hipótesis postulada y que en combinación explican el 19.2% de la varianza. Conclusiones considera el efecto combinado de la búsqueda de sensaciones y la autoeficacia, así como las implicaciones prácticas para la elaboración de programas preventivos sobre la conducta sexual de riesgo en los jóvenes.