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Table 2 Changes in accelerometry-derived physical activity and sedentary time variables (baseline to 12-months) between HIGH and MODERATE groups in BETA, Alberta, Canada, 2010–2014

From: Effects of prescribed aerobic exercise volume on physical activity and sedentary time in postmenopausal women: a randomized controlled trial

Outcome measure a

Baseline

M (SD)

12-months

M (SD)

LS Mean Change M (95% CI)

P value b

LS Group Difference M (95% CI)

P value d

Total physical activity time (MET-h/d)

 HIGH

25.2 (2.2)

26.3 (2.6)

1.03 (0.82, 1.23)

<  0.001

0.29 (−0.0002, 0.59)

0.05

 MODERATE

25.2 (2.1)

25.8 (2.4)

0.73 (0.52, 0.95)

<  0.001

  

Total physical activity time (MET-h/wk)

 HIGH

176.4 (15.4)

184.1 (18.2)

7.21 (5.74, 8.61)

 

2.03 (−0.014, 4.13)

 

 MODERATE

176.4 (14.7)

180.6 (16.8)

5.11 (5.74, 8.61)

   

Moderate-vigorous physical activity time (h/d)

 HIGH

2.0 (0.8)

2.3 (0.8)

0.34 (0.25, 0.44)

<  0.001

0.12 (−0.03, 0.26)

0.11

 MODERATE

2.0 (0.8)

2.2 (0.8)

0.23 (0.13, 0.33)

<  0.001

  

Moderate-vigorous physical activity time (h/wk)

 HIGH

14.0 (5.6)

16.1 (5.6)

2.38 (1.75, 3.08)

 

0.84 (− 0.21, 1.82)

 

 MODERATE

14.0 (5.6)

15.4 (5.6)

1.61 (0.91, 2.31)

   

Light activity time (h/d)

 HIGH

4.3 (1.0)

4.3 (0.9)

0.01 (− 0.09, 0.11)

0.88

0.01 (−0.13, 0.15)

0.94

 MODERATE

4.2 (0.8)

4.2 (0.9)

0.002 (−0.10, 0.10)

0.97

  

Light activity time (h/wk)

 HIGH

30.1 (7.0)

30.1 (6.3)

0.07(−0.63, 0.77)

 

0.07 (−0.91, 1.05)

 

 MODERATE

29.4 (5.6)

29.4 (6.3)

0.01 (− 0.70, 0.70)

   

Sedentary time (h/d)

 HIGH

8.7 (1.6)

8.3 (1.4)

−0.48 (− 0.64, − 0.32)

<  0.001

− 0.13 (− 0.36, 0.11)

0.28

 MODERATE

8.9 (1.6)

8.5 (1.6)

−0.35 (− 0.52, − 0.18)

<  0.001

  

Sedentary time (h/wk)

 HIGH

60.9 (11.2)

58.1 (9.8)

−3.36 (−4.48, −2.24)

 

−0.91 (−2.52, 0.77)

 

 MODERATE

62.3 (11.2)

59.5 (11.2)

−2.45 (− 3.64, −1.26)

   
  1. CI Confidence interval, d Day, h Hours, LS Least-squares, M Mean, MET Metabolic equivalent of task, SD Standard deviation, wk Week
  2. an = 170 and 161 for the HIGH and MODERATE groups, respectively
  3. bP value for the test of significance for the null hypothesis that the LS mean difference across time equals 0
  4. cLeast-square group mean of the High and Moderate exercise groups and their within- and between-group differences were estimated from general linear models specified as: physical activity and sedentary time changes from baseline to 12-months = β0 + β1 (intervention group) + β2 (baseline outcome value) + β3 (age) + β4 (study site) + β5 (baseline BMI) + β6 (baseline VO2peak) + β7 (difference in accelerometer wear time between time-points)
  5. dP value for the test of significance for the null hypothesis that the LS mean difference between the two intervention groups equals 0