Table 2: Cross-sectional associations between movement behaviors and FMIa in 8- to 11-year-old Danish children

From: Fatness predicts decreased physical activity and increased sedentary time, but not vice versa: support from a longitudinal study in 8- to 11-year-old children

 Model 1Model 2Model 3 (n=467)
Variablenrβ (95% CI)P-valuenrβ (95% CI)P-valuerβ (95% CI)P-value
Physical activityb605−0.24−0.35 (−0.47; −0.23)<0.001605−0.25−0.37 (−0.49; −0.25)<0.001−0.26−0.38 (−0.51; −0.24)<0.001
MVPA605−0.32−0.29 (−0.36; −0.22)<0.001605−0.33−0.30 (−0.37; −0.23)<0.001−0.33−0.34 (−0.43; −0.25)<0.001
Sedentary time6050.080.02 (−0.001; 0.05)0.066050.120.04 (0.01; 0.06)0.01−0.06−0.03 (−0.06; 0.01)0.13
Screen time7620.060.09 (−0.01; 0.18)0.077610.040.06 (−0.03; 0.15)0.20−0.04−0.07 (−0.18; 0.04)0.19
Sleep duration509−0.12−0.48 (−0.86; −0.10)0.01509−0.10−0.41 (−0.80; −0.03)0.04−0.17−0.74 (−1.14; −0.34)<0.001
CSHQ7800.140.03 (0.01; 0.05)0.0037780.110.02 (0.001; 0.04) (−0.02; 0.03)0.76
  1. Abbreviations: CI, confidence interval; CSHQ, Children’s Sleep Habits Questionnaire; FMI, fat mass index; MVPA, moderate-to-vigorous physical activity.
  2. Data are presented as unstandardized regression coefficients (β) with 95% CI using linear mixed model with person as a random factor. FMI was logarithmically transformed and β was back-transformed using the exponential function. Partial correlation coefficients (r) were calculated as average of r from baseline, day 100 and day 200 except for screen time and CSHQ that were only measured at baseline. Coefficients represent a change of 1 unit in FMI for a 100-cpm change in total physical activity, a 10-min change in time spent in MVPA, a 1% change in sedentary time, a 60-min change in screen time and sleep duration and a one-point change in CSHQ.
  3. Model 1: adjusted for baseline age, sex, pubertal status, sex–pubertal status interaction and month of baseline measurement. Model 2: additionally adjusted for number of parents born in Denmark and highest education of the household. Model 3: additionally included in all analyses were energy density of the diet, MVPA, sedentary time, screen time, sleep duration and CSHQ (physical activity was not adjusted for MVPA and sedentary time).
  4. aFMI=total fat mass × height–2.
  5. bTotal tri-axial physical activity (100 cpm), model 1: (r=−0.24, β=−0.21, P<0.001), model 2: (r=−0.26, β=−0.23, P<0.001) and model 3: (r=−0.27, β=−0.24, P<0.001).