Correlatos da atividade física de moderada a vigorosa, tempo sedentário, tempo de tela e índice de massa corporal de crianças

• Ano de defesa: 2016
• Autor(a) principal: Ferrari, Gerson Luis de Moraes [UNIFESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Motor activity; Sedentary lifestyle; Obesity; Body composition; Pediatric; Child; Atividade física; Estilo de vida sedentário; Obesidade; Composição corporal; Pediatria; Crianças
• Link de acesso: https://sucupira.capes.gov.br/sucupira/public/consultas/coleta/trabalhoConclusao/viewTrabalhoConclusao.jsf?popup=true&id_trabalho=4243711; http://repositorio.unifesp.br/handle/11600/47314

Purpose: Identify potential correlates of moderate-to-vigorous physical activity (MVPA), sedentary behavior (SB), screen time (ST) and body mass index (BMI) in children of São Caetano do Sul. Methods: Data collection was performed in the city of São Caetano do Sul as part of the International Study of Childhood Obesity Lifestyle and the Environment (ISCOLE). For seven consecutive days, 328 children (169 boys) used accelerometers to objectively monitor the MVPA and SB. The ST was calculated from the number of hours/day in children spent watching television (TV), computer and video games. BMI was measured using bioelectrical impedance. The participating children and their parents/guardians completed questionnaires regarding individual related (anthropometric and behavioral), family and home and school environment. All aspects associated (p<0.10) with MVPA, SB, ST and BMI in univariate analysis were entered in the final models and those with p<0.05 in the final models were considered correlates of MVPA, SB, ST and BMI. We use multi-level linear regression and included sex, ethnicity, number of siblings and total annual household income and school as covariates in all multivariate models. Results: Mean MVPA and SB (min/day) were 59.3 (44.5% met MVPA guidelines: 63.9% of boys and 25.1% girls: p<0.001) and 500 (boys: 489; girls: 511; p=0.005), respectively. The average ST was 234 (boys: 246; girls: 222; p=0.053) min/day. Overall, 51.8% of children were classified as overweight/obesity (50.3% of boys and 53.4% girls: p=0.014) and the mean BMI was 20.1 kg/m2 (boys: 20.1; girls; 20.2; p=0.713). To MVPA, we found the following correlates: waist circumference (WC; ?=-0.011), travel mode to school (active; ?=0.133) and maternal employment status (part-time or less; (?=-0.195) in boys. Already in girls, only travel mode to school (active; ?=-0.143). As for the SB, just found MVPA (?=-1.434) as correlates in boys and girls were healthy diet pattern score (?=-19.301), MVPA (?=-1.896) and time of travel to school (?15 min: ?=-41.642; ]15-30] min: ?=57.918). In ST, correlates were BMI (?=0.019), the healthy dietary pattern score (?=-0.090) and TV in bedroom (?=0.201) in boys. Healthy diet pattern score (?=-0.184), travel mode to school (active; ?=-0.230) and policies or practices on physical activity (?=-0.281) were related in girls. The correlates of BMI in boys were the percentage of body fat (%BF; ? =0.0209), ST (?=0.0059) and policies or practices on healthy eating (?=0.0276). Already in girls, only the% BF was considered correlate (?=0.0221) of BMI. Conclusion: Several factors have been identified as correlates of MVPA, SB, ST and BMI in children of São Caetano do Sul. They were common in both boys and girls, travel to school (MVPA), MVPA (SB), healthy diet pattern score (ST), and %BF (BMI). These results should be used by researchers and public health professionals who want to implement interventions to increase MVPA, reduce SB, ST and BMI of children.