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Table 1 Intention-to-treat analysis for primary outcomes (accelerometer-derived physical activity)

From: Promoting physical activity among adolescent girls: the Girls in Sport group randomized trial

 

Baseline

Follow-up

Est. of effect (95% CI)

Time

P values

Intervention

Control

Intervention

Control

Group

Interaction

(n = 566)

(n = 633)

(n = 306)

(n = 298)

Total PA (TPA), median (IQRb)

407.23 (337.26,498.31)

401.39 (323.47,492.16)

358.60 (300.45,467.37)

358.00 (287.54,447.79)

2.16 (-40.79, 45.11)

<0.0001

0.3825

0.8944

0.0001

0.5058

0.6782a

Sedentary activity, mins/day (95% CI)

476.10 (430.08,521.11)

480.43 (432.46,534.95)

497.43 (454.58,543.88)

508.2 (464.70,558.29)

-2.81 (-21.74, 16.19)

<0.0001

0.3953

0.8667

Sedentary activity, %time/day (95% CI)

60.39 (55.36,65.51)

61.48 (56.49,66.53)

65.25 (59.60,69.84)

65.62 (60.22,69.91)

0.25 (-1.58, 2.07)

<0.0001

0.3155

0.7362

Light activity, mins/day (95% CI)

271.50 (238.85,308.21)

261.87 (226.28,296.54)

239.61 (206.30,283.15)

239.14 (203.30,278.57)

-4.69 (-17.10, 7.73)

<0.0001

0.4776

0.5100

Light activity, %time/day (95% CI)

34.69 (30.43,39.03)

33.71 (29.46,38.23)

32.30 (27.59,37.43)

31.36 (26.57,35.72)

0.34 (-0.91, 1.59)

<0.0001

0.2841

0.5543

Moderate activity, mins/day (95% CI)

33.13 (24.39,43.35)

32.23 (23.50,42.27)

25.65 (16.90,38.70)

25.00 (17.36,34.75)

-0.53 (-5.91, 4.85)

<0.0001

0.1997

0.8390

Moderate activity, %time/day (95% CI)

4.30 (3.10,5.57)

4.09 (2.97,5.43)

3.37 (2.15,4.98)

3.16 (2.18,4.43)

-0.02 (-0.76, 0.71)

<0.0001

0.1443

0.8898

Vigorous activity, mins/day (95% CI)

2.40 (1.08,4.82)

2.82 (1.17,5.35)

1.33 (0.48,2.90)

1.50 (0.50,3.50)

0.24 (-0.93, 1.41)

<0.0001

0.5136

0.7126

Vigorous activity, %time/day (95% CI)

0.33 (0.14,0.63)

0.35 (0.15,0.69)

0.17 (0.06,0.37)

0.19 (0.06,0.44)

0.02 (-0.12, 0.16)

<0.0001

0.5108

0.8482

Moderate-to-vigorous activity, mins/day (95% CI)

36.21 (26.27,47.33)

35.29 (25.41,47.02)

27.13 (17.71,42.31)

27.00 (18.25,37.83)

-0.35 (-6.58, 5.87)

<0.0001

0.3372

0.8481

<0.0001

0.3871

0.7608a

Moderate-to-vigorous activity, %time/day (95% CI)

4.67 (3.39,6.19)

4.53 (3.20,6.14)

3.58 (2.29,5.24)

3.47 (2.36,4.81)

-0.04 (-0.87, 0.79)

<0.0001

0.2669

0.8500

<0.0001

0.3169

0.7763a

  1. Linear mixed models; a P values represent those combined from 10 imputed datasets, calculated using PROC MI in SAS; b IQR interquartile range