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Table 3 Summary of linear mixed effects models comparing overall group (Intervention vs Control) and group-by-time differences in physical activity (adjusted means and 95 % CI)

From: Outcomes of a four-year specialist-taught physical education program on physical activity: a cluster randomized controlled trial, the LOOK study

 

Age

Group

Group by Time

 

Age 8

Age 9

Age 10

Age 11

Age 12

P

P

Total Physical Activity (steps/day)

 Boys Control

12134 (11469,12799)

11085 (10408,11762)

11354 (10675,12033)

11540 (10769,12311)

10238 (9370,11106)

0.763

0.131

 Boys Intervention

12595 (11956,13235)

10456 (9796,11117)

11336 (10656,12015)

11276 (10578,11974)

10374 (9662,11087)

  

 Girls Control

10176 (9530,10824)

8844  (8214,9475)

9323 (8705,9941)

10322 (9563,11082)

9071 (8373,9770)

0.209

0.400

 Girls Intervention

9733 (9100,10366)

8268 (7640,8896)

9256 (8685,9827)

9959 (9202,10716)

9141 (8424,9859)

  

Moderate to Vigorous Activity (mins/day)

 Boys Control

NA

NA

NA

44.9 (40.2,49.7)

48.7 (44.1,53.3)

0.130

0.006

 Boys Intervention

NA

NA

NA

53.3 (49.1,57.4)

49.9 (45.8,53.8)

  

 Girls Control

NA

NA

NA

41.6 (37.4,45.9)

35.6 (31.8,39.5)

0.207

0.076

 Girls Intervention

NA

NA

NA

36.0 (31.8,40.1)

34.0 (30.1,37.9)

  

Sedentary time (mins/day)

 Boys Control

NA

NA

NA

380.0 (369,391)

402.8 (391,414)

<0.001

0.761

 Boys Intervention

NA

NA

NA

359.6 (350,369)

382.8 (373,393)

  

 Girls Control

NA

NA

NA

372.6 (361,384)

403.3 (392,414)

0.530

0.772

 Girls Intervention

NA

NA

NA

372.5 (361,384)

401.3 (391,412)

  
  1. NA = Not available in early years due to unavailability of accelerometers at this time CI confidence interval