Baseline characteristics of study participants by birth order status in Brazilian sample.

N = number of subjects. FM = fat mass; FFM = fat free mass; Fat free mass index (FFMI) = FFM (kg)/height2 (m); Fat mass index (FMI) = FM (kg)/height2 (m); T-CHO = total cholesterol; HDL = high density lipoproteins; TRI = triglycerides.T-test for independent samples was used to compare the two groups. Data are mean (SD), unless otherwise indicated.The calculation of the metabolic risk z-score is described in the methods section.