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Table 3 Linear mixed model analyses of the intervention effect on Total Physical activity and Moderate to Vigorous Physical activity

From: A peer coach intervention in childcare centres enhances early childhood physical activity: The Active Early Learning (AEL) cluster randomised controlled trial

  Model 1
Total Physical Activity (min/h)
Model 2
Moderate to Vigorous Physical Activity (min/h)
Estimates CI p Estimates CI p
Fixed Effects
 Intercept 8.75 3.45–14.04 0.001 2.98 −0.90 – 6.87 0.132
 Time [POST] −2.30 −3.54 – −1.05 < 0.001 −1.43 − 2.33 – −0.52 0.002
 Group [Intervention] −0.23 −2.32 – 1.87 0.833 −0.11 −1.54 – 1.31 0.875
 Age 0.14 −0.95 – 1.22 0.808 0.32 −0.49 – 1.12 0.437
 Sex [Boy] 2.75 1.83–3.67 < 0.001 2.05 1.37–2.73 < 0.001
 Wear-time 0.02 0.01–0.02 < 0.001 0.01 0.01–0.01 < 0.001
 Group by Time [POST] 4.06 2.66–5.47 < 0.001 2.33 1.31–3.34 < 0.001
Random Effectsa
 Mean square variance σ2 13.29 3.65   6.84 2.61  
 Between-participant variance 5.15 2.27   3.13 1.77  
 Between-centre variance 3.07 1.75   1.32 1.15  
 Intraclass Correlation Coefficient (ICC) 0.38    0.39   
N: Centres 15    15   
N: Participants 281    281   
N: Observations 451    451   
  1. a Random fffects are shown as estimates and standard errors