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Table 2 Familial aggregation of age, sex and age*sex adjusted aerobic fitness residuals

From: The influence of aerobic fitness on obesity and its parent-offspring correlations in a cross-sectional study among German families

   ANOVA
Regression model from which residuals were obtained for ANOVA Number of subjects ICC (p-Value) R2
age + sex + age*sex 287 0.22 (<0.001) 0.43
age + sex + age*sex + PA 223 0.19 (0.001) 0.41
age + sex + age*sex + BMI# 287 0.14 (0.004) 0.37
age + sex + age*sex + BMI# + PA 223 0.15 (0.008) 0.38
age + sex + age*sex + BMI# + PA† + BMI#*PA 223 0.15 (0.007) 0.38
age + sex + age*sex + BMI# + PA + smoking household 219 0.15 (0.008) 0.38
  1. Adjusted for multiple testing: α = 0.05/6 = 0.00833, bold numbers indicate statistically significant intraclass correlation coefficients (ICCs)
  2. Physical activity (PA) is included as two variables: average minutes per day spent in moderate or vigorous physical activity (MVPA) and average minutes of wearing time; interaction term as average minutes per day spent in MVPA*BMI
  3. #Body mass index (BMI) categories according to WHO in adults (<18.5; 18.5- < 25; 25- < 30; 30+) and IOTF in children [29]