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Table 3 Age dependent associations of time spent in sedentary behaviour, total and moderate-to-vigorous physical activity and anthropometric measures

From: Longitudinal analysis of physical activity, sedentary behaviour and anthropometric measures from ages 6 to 11 years

  SB model PA model MVPA model
Outcome: Body mass index
  β 95% CI   β 95% CI   β 95% CI  
 Age 0.26 0.13–0.39 *** 0.66 0.48–0.84 *** 0.60 0.53–0.67 ***
 SB 0.04 −0.04 – 0.11        
 SB x Age 0.04 0.02–0.06 ***       
 Total PA     −0.06 −0.14 – 0.01     
 Total PA x Age     −0.02 −0.04 – 0.00     
 MVPA        −0.04 −0.14 – 0.05  
 MVPA x Age        −0.05 −0.09 – − 0.01 **
Outcome: Fat mass index
 Age 0.10 0.03–0.23 *** 0.08 0.02–0.21 ** 0.11 0.06–0.21 ***
 SB 0.05 0.02–0.09 **       
 SB x Age 0.00 0.00–0.00        
 Total PA     −0.05 −0.05 – 0.00 **    
 Total PA x Age     0.00 0.00–0.00     
 MVPA        −0.03 − 0.05 – 0.00  
 MVPA x Age        0.00 −0.03 – 0.00  
  1. Abbreviations: SB sedentary behaviour per 60 min/day, Total PA total physical activity per 60 min/day, MVPA moderate to vigorous PA per 60 min/day, CI confidence interval *P < 0.05, **P < 0.01, ***P < 0.001
  2. Data were analysed with the use of 3 separate mixed models, adjusted for covariates gender, intervention group, wear time and study country; Age was centred to the lowest age of any participant (5.89 years).