Abstract Objective: To assess the predictive value of selected growth phenotypes for neonatal morbidity and mortality in preterm infants < 30 weeks and to compare them with INTERGROWTH-21st (IG21). Methods: Retrospective analysis of data from the Brazilian Neonatal Research Network (BNRN) database for very low birth weight (VLBW) at 20 public tertiary-care university hospitals. Outcome: the composite neonatal morbidity and mortality (CNMM) consisted of in-hospital death, oxygen use at 36 weeks, intraventricular hemorrhage grade 3 or 4, and Bell stage 2 or 3 necrotizing enterocolitis. Selected growth phenotypes: small-for-gestational-age (SGA) defined as being < 3rd (SGA3) or 10th (SGA10) percentiles of BW, and large-for-gestational-age (LGA) as being > 97th percentile of BW. Stunting as being < 3rd percentile of the length and wasting as being < 3rd percentile of BMI. Single and multiple log-binomial regression models were fitted to estimate the relative risks of CNMM, comparing them to IG21. Results: 4,072 infants were included. The adjusted relative risks of CNMM associated with selected growth phenotypes were (BNRN/IG21): 1.45 (0.92–2.31)/1.60 (1.27–2.02) for SGA; 0.90 (0.55–1.47)/1.05 (0.55–1.99) for LGA; 1.65 (1.08–2.51)/1.58 (1.28–1.96) for stunting; and 1.48 (1.02–2.17) for wasting. Agreement between the two references was variable. The growth phenotypes had good specificity (>95%) and positive predictive value (70-90%), with poor sensitivity and low negative predictive value. Conclusion: The BNRN phenotypes at birth differed markedly from the IG21 standard and showed poor accuracy in predicting adverse neonatal outcomes. Objective INTERGROWTH21st INTERGROWTHst INTERGROWTH 21st st IG . (IG21) Methods (BNRN VLBW (VLBW tertiarycare tertiary care hospitals Outcome (CNMM inhospital hospital death 4 enterocolitis smallforgestationalage small gestational age SGA (SGA rd SGA3 (SGA3 th SGA10 (SGA10 BW largeforgestationalage large LGA (LGA BMI logbinomial log binomial Results 4072 072 4,07 included BNRN/IG21 BNRNIG21 BNRNIG (BNRN/IG21) 145 1 45 1.4 0.92–2.31/1.60 092231160 0.92–2.31 /1.60 0 92 31 60 (0.92–2.31)/1.6 1.27–2.02 127202 27 02 (1.27–2.02 090 90 0.9 0.55–1.47/1.05 055147105 0.55–1.47 /1.05 55 47 05 (0.55–1.47)/1.0 0.55–1.99 055199 99 (0.55–1.99 165 65 1.6 1.08–2.51/1.58 108251158 1.08–2.51 /1.58 08 51 58 (1.08–2.51)/1.5 1.28–1.96 128196 28 96 (1.28–1.96 stunting 148 48 1.02–2.17 102217 17 (1.02–2.17 variable >95% 95 (>95% 7090%, 7090 70 90% , (70-90%) Conclusion IG2 outcomes (IG21 SGA1 (SGA1 407 07 4,0 BNRN/IG2 BNRNIG2 (BNRN/IG21 14 1. 0.92–2.31/1.6 09223116 092231 0.92–2.3 160 /1.6 9 6 (0.92–2.31)/1. 1.27–2.0 12720 (1.27–2.0 09 0. 0.55–1.47/1.0 05514710 055147 0.55–1.4 105 /1.0 5 (0.55–1.47)/1. 0.55–1.9 05519 (0.55–1.9 16 1.08–2.51/1.5 10825115 108251 1.08–2.5 158 /1.5 (1.08–2.51)/1. 1.28–1.9 12819 (1.28–1.9 1.02–2.1 10221 (1.02–2.1 >95 (>95 7090% 709 7 (70-90% (IG2 40 BNRN/IG (BNRN/IG2 0.92–2.31/1. 0922311 09223 0.92–2. /1. (0.92–2.31)/1 1.27–2. 1272 (1.27–2. 0.55–1.47/1. 0551471 05514 0.55–1. 10 (0.55–1.47)/1 0551 (0.55–1. 1.08–2.51/1. 1082511 10825 1.08–2. 15 (1.08–2.51)/1 1.28–1. 1281 (1.28–1. 1.02–2. 1022 (1.02–2. >9 (>9 (70-90 (IG (BNRN/IG 0.92–2.31/1 0922 0.92–2 /1 (0.92–2.31)/ 1.27–2 127 (1.27–2 0.55–1.47/1 0.55–1 (0.55–1.47)/ 055 (0.55–1 1.08–2.51/1 1082 1.08–2 (1.08–2.51)/ 1.28–1 128 (1.28–1 1.02–2 102 (1.02–2 (> (70-9 0.92–2.31/ 092 0.92– / (0.92–2.31) 1.27– 12 (1.27– 0.55–1.47/ 0.55– (0.55–1.47) (0.55– 1.08–2.51/ 108 1.08– (1.08–2.51) 1.28– (1.28– 1.02– (1.02– ( (70- 0.92 (0.92–2.31 1.27 (1.27 0.55 (0.55–1.47 (0.55 1.08 (1.08–2.51 1.28 (1.28 1.02 (1.02 (70 (0.92–2.3 1.2 (1.2 0.5 (0.55–1.4 (0.5 1.0 (1.08–2.5 (1.0 (7 (0.92–2. (1. (0. (1.08–2. (0.92–2 (1 (0 (1.08–2 (0.92– (1.08– (0.92 (1.08 (0.9

RESUMO Objetivo: Mensurar o grau de satisfação de profissionais de saúde quanto à usabilidade de um sistema de informação em saúde neonatal e identificar os fatores que podem influenciar na satisfação do usuário frente à usabilidade. Métodos: Estudo transversal e exploratório realizado com 50 profissionais de saúde integrantes dos centros da Rede Brasileira de Pesquisas Neonatais. Para avaliação da usabilidade foi utilizado o instrumento System Usability Scale entre fevereiro e março de 2017. Realizou-se a análise estatística descritiva e inferencial das variáveis coletadas, com a finalidade de descrever a amostra, quantificar o grau de satisfação dos usuários e identificar as variáveis associadas ao grau de satisfação do usuário em relação à usabilidade. Resultados: Da população avaliada, 75% era do sexo feminino, com idade média 52,8 anos, 58% com pós-graduação (doutorado); tempo médio da última formação de 17 anos; área de atuação em medicina (neonatologia), grau intermediário de conhecimento em informática e tempo de utilização média do sistema de 52 meses. Quanto à usabilidade, 94% avaliaram o sistema como “bom”, “excelente” ou “melhor impossível”. A usabilidade do sistema não foi associada a idade, sexo, escolaridade, profissão, área de atuação, nível de conhecimento em informática e tempo de uso do sistema. Conclusões: O grau de satisfação do usuário do sistema informatizado de saúde foi considerado bom. Não foram identificados fatores demográficos que influenciassem sua avaliação.

ABSTRACT Objective: To measure the level of satisfaction regarding the usability of a neonatal health information system and identify if demographic factors can influence the usability of a health information system. Methods: A cross-sectional, exploratory study was carried out with a convenience sample of 50 users of the Brazilian Neonatal Research Network. The instrument chosen for the usability evaluation was the System Usability Scale between February and March 2017. The statistical analysis of the collected variables was carried out in order to describe the sample, to quantify the level of satisfaction of the users and to identify the variables associated with the level of satisfaction. Results: The female gender represented 75% of the sample. The mean age was 52.8 years; 58% had a doctoral degree, average time of graduation was 17 years, with area of practice in medicine (neonatology), with intermediate knowledge in computer science (74%) and mean system use time of 52 months. Regarding usability, 94% rated the system as “good”, “excellent” or “better than imaginable”. The usability of the system was not associated with age, gender, education, profession, area of practice, knowledge in computer science and time of system use. Conclusion: The level of satisfaction of the computerized health system user was considered good. No demographic factors were associated with the satisfaction of the users.

Este estudo investigou evidências de validade e precisão de um instrumento de diferencial semântico que tem sido utilizado para medir a transferência de significados entre estímulos equivalentes. Um total de 196 estudantes universitários avaliou fotografias de faces expressando emoções e também figuras abstratas, utilizando um instrumento composto por 13 escalas bipolares ancoradas por adjetivos opostos. A análise fatorial dos dados coletados forneceu indicações da validade do instrumento e os coeficientes alfa obtidos indicam que os dois fatores extraídos nesta análise possuem níveis de precisão aceitáveis, embora um dos fatores deva ser revisto. Discute-se que o modelo de equivalência de estímulos, entendido como um modelo experimental de relações simbólicas, pode se beneficiar de instrumentos capazes de fornecer medidas válidas de transferência de significado.

This study assessed evidence of validity and precision of a semantic differential test that has been used to measure the transfer of meaning among equivalent stimuli. Participants were 196 college students who evaluated pictures of faces expressing emotions and also abstract pictures using an instrument comprised by 13 bipolar scales anchored by opposite adjectives. The factor analysis of the data evidenced the validity of the instrument. Values of alpha coefficients indicated that the factors extracted by this analysis have acceptable levels of precision, although one of the factors might be revised. It is discussed that the stimulus equivalence paradigm, an experimental model for symbolic relations, can benefit from instruments that provide valid measures of meaning transfer.

A reorganização de classes de equivalência pode depender do número de relações de linha de base revertidas. Para investigar essa hipótese, 28 estudantes universitários, distribuídos em quatro grupos, foram submetidos ao procedimento de escolha de acordo com o modelo para o estabelecimento de relações condicionais entre estímulos e a emergência de cinco classes de equivalência com cinco estímulos cada uma. O procedimento para cada grupo diferiu quanto ao número de relações de linha de base revertidas: uma, duas, três ou quatro, seguidas por um novo teste de equivalência para verificar a eventual reorganização das classes. A reorganização das classes de equivalência ocorreu independentemente do número de relações revertidas. Conclui-se que classes de estímulos equivalentes podem ser estabelecidas e modificadas subsequentemente, o que não dependeu do número de relações revertidas.

The reorganization of equivalence classes may depend on the number of reversed baseline relations. To investigate this hypothesis, 28 undergraduate students distributed in four groups were exposed to a matching-to-sample procedure to establish conditional relations between stimuli and the emergence of five equivalence classes with five stimuli each. The procedure for each group differed by the number of reversed baseline relations (one, two, three or four) followed by a new equivalence test to evaluate the possible reorganization of the classes. The reorganization of the equivalence classes occurred independently of the number of reversed relations. It was concluded that stimuli equivalence classes may be established and subsequently modified, what does not dependent on the number of reversed relations.