Sociodemographic and behavioral characteristics of obese students with sleep problems in Southern Brazil

Abstract

Objective This study estimated the combined prevalence of insufficient number of hours of sleep per day and excess body adiposity among young students. The sociodemographic and behavioral characteristics associated with this concurrent health conditions were investigated. Methods This is a cross-sectional school-based study of 975 participants aged 11-14 years in Florianópolis, Santa Catarina state, Brazil. Body adiposity was assessed based on tricipital and subscapular skinfold measurements and classified according to Lohman. The total number of hours of sleep per day was reported by the students’ parents/guardians, and it was classified as follows: as <8 hours per day and ≥8 hours per day. Data on sociodemographic characteristics, food consumption, and physical activity were collected using a self-administered questionnaire. The chi-square test and multinomial logistic regression with a 5% significance level were used to evaluate the association between the variables. Results The combined prevalence of insufficient number of hours of sleep per day and excess body adiposity was 25.1% (CI95%:20.7-29.9). The sociodemographic and behavioral factors predictive of these conditions were as follows: 13-14 year age group and household monthly income in the intermediate tertile. Conclusion The concurrent presence of insufficient sleep and excess body adiposity was found in a little more than a quarter of the students investigated. The population subgroups belonging to the 13-14 year age group and intermediate tertile of income were more likely to have concurrent insufficient number of hours of sleep per day and excess body adiposity.

Adequate sleep duration among children and adolescents: a review of the Brazil's Report Card

“…Detailed information on all studies is available in the supplementary file (Supplementary File 1). The majority of studies were conducted in southern Brazil (n = 17) 28,30,31,33,35,39,43,[46][47][48][49][50][51][52][53][54][55] followed by the southeast (n = 3) 15,56,57 and northeast (n = 5) [58][59][60][61][62] . No studies were available from cities in the mid-west or northern regions of Brazil.…”

“…Two studies were from a national sample, contemplating all five Brazilian macro-regions 20,63 . Studies conducted with adolescents (>10 years old) were the most frequent (n = 16) 21,29,31,32,35,40,44,47,49,50,53,55,58,[60][61][62] followed by those with children aged 5-10 (n = 6) 15,46,51,52,56,59 and infants and/or toddlers (n = 2) (<5 years old) 36,54 . Three studies analyzed more than one age group 48,57,63 .…”

“…Although some studies utilized the same study/sample, different cutoffs were adopted across them. Eight articles applied sleep duration cutoffs proposed by health organizations to describe sleep compliance (24-hour Canadian guideline, National Sleep Foundation) 16,20,25,27,31,32,34,53 . Other studies classified sleep duration as adequate or inadequate based on varying cutoff values with ≥8 hours per day as the most frequent criteria (n = 13).…”