Table 3: Prospective 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

 Change in behavior vs change in FMIbBaseline behavior as predictor of change in FMIcBaseline FMI as predictor of change in behaviord
Variablenrβ (95% CI)P-valuenrβ (95% CI)P-valuenrβ (95% CI)P-value
Physical activitye617−0.07−0.028 (−0.061; 0.004)0.096820.060.027 (−0.006; 0.060)0.11629−0.16−0.117 (−0.170; −0.065)<0.001
MVPA617−0.14−0.042 (−0.065; −0.018)<0.0016820.040.013 (−0.007; 0.033)0.21629−0.20−0.192 (−0.265; −0.119)<0.001
Sedentary time617−0.06−0.006 (−0.015; 0.002)0.15682−0.05−0.45 (−1.08; 0.18)0.166290.160.42 (0.22; 0.63)<0.001
Screen timef6830.070.028 (−0.001; 0.056)0.057
Sleep duration539−0.04−0.051 (−0.155; 0.053)0.34665−0.02−0.027 (−0.119; 0.065)0.57549−0.010.001 (−0.02; 0.02)0.96
CSHQf698−0.01−0.001 (−0.008; 0.005)0.72
  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 partial correlation coefficients (r) and unstandardized regression coefficients (β) with 95% CI using a linear mixed model with school as a random factor. 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. All models were adjusted for baseline age, sex, pubertal status, sex–pubertal status interaction, month of baseline measurement and days of follow-up.
  3. aFMI=total fat mass × height–2.
  4. bAdditionally adjusted for the particular baseline movement behavior of interest and baseline FMI.
  5. cAdditionally adjusted for baseline FM.
  6. dAdditionally adjusted for the particular baseline movement behavior of interest.
  7. Total tri-axial physical activity (100 cpm); change in behavior vs change in FMI (r=–0.03, β=–0.008, P=0.52), baseline behavior as predictor of change in FMI (r=–0.05, β=–0.15, P=0.14), baseline FMI as predictor of change in behavior (r=–0.16, β=–0.219, P<0.001).
  8. Screen time and CSHQ were only obtained at baseline.