Ronque Enio R V, Werneck André O, Bueno Maria R O, Cyrino Edilson S, Stanganelli Luiz C R, Arruda Miguel
Study and Research Group in Physical Activity and Exercise-GEPAFE. State University of Londrina-UEL, Londrina, Brazil.
Study and Research Group in Metabolism, Nutrition, and Exercise-GEPEMENE. State University of Londrina-UEL, Londrina, Brazil.
PLoS One. 2018 Feb 6;13(2):e0191908. doi: 10.1371/journal.pone.0191908. eCollection 2018.
Our aim was to verify the tracking of body adiposity indicators from childhood to adolescence and analyze the mediation effects of BMI on the stability of body adiposity. Our sample was composed by 375 children (197 boys). The children were followed-up over 3 years. Body mass and stature were measured as anthropometric indicators. Body adiposity was estimated through the subcutaneous skinfold method, with measures of triceps (TRSF) and subscapular skinfolds (SSSF). Skinfolds were analyzed singly and agglutinated through the sum of skinfolds (∑SF). The sample was categorized into tertiles, and thereafter, the kappa coefficient and McNemar test were adopted to verify stability. For continuous measures, the Intra-Class Correlation coefficient (ICC) was used. Moreover, mediation analyzes were used according to Baron and Kenny with the Sobel test to verify mediation effects. The significance level adopted was 5%. Adiposity indicators increased during the 3 years of follow-up in both sexes (p<0.05). ICCs in all indicators of adiposity were between 0.84 and 0.94 for boys and 0.86 and 0.94 for girls, indicating high tracking. Moreover, 70% of subjects remained in the highest tertile of body adiposity. However, no differences were observed in tertile changes (p>0.05). BMI at the age of adiposity rebound partially mediated all indicators of adiposity from childhood (baseline) to adolescence (3 years later) in both sexes (p<0.001). Thus, moderate to high tracking of body adiposity indicators between childhood and adolescence was verified. Moreover, BMI at the age of adiposity rebound partially mediated the relationship between adiposity in childhood (baseline) and in adolescence (3 years of follow-up).
我们的目的是验证从儿童期到青春期身体肥胖指标的追踪情况，并分析体重指数（BMI）对身体肥胖稳定性的中介作用。我们的样本由375名儿童（197名男孩）组成。对这些儿童进行了3年的随访。测量了体重和身高作为人体测量指标。通过皮下褶厚度法估计身体肥胖程度，测量肱三头肌（TRSF）和肩胛下褶厚度（SSSF）。分别分析褶厚度，并通过褶厚度总和（∑SF）进行汇总。将样本分为三分位数，然后采用kappa系数和McNemar检验来验证稳定性。对于连续测量，使用组内相关系数（ICC）。此外，根据Baron和Kenny的方法进行中介分析，并采用Sobel检验来验证中介作用。采用的显著性水平为5%。在3年的随访中，男女两性的肥胖指标均有所增加（p<0.05）。男孩所有肥胖指标的ICC在0.84至0.94之间，女孩在0.86至0.94之间，表明追踪效果良好。此外，70%的受试者仍处于身体肥胖的最高三分位数。然而，三分位数变化未观察到差异（p>0.05）。肥胖反弹年龄时的BMI在男女两性中均部分介导了从儿童期（基线）到青春期（3年后）的所有肥胖指标（p<0.001）。因此，验证了儿童期到青春期身体肥胖指标的中度至高度追踪情况。此外，肥胖反弹年龄时的BMI部分介导了儿童期（基线）和青春期（随访3年）肥胖之间的关系。
