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Table 2 Means and standard deviations for outcome measures by time and group based on an intent-to-treat analyses

From: Effectiveness of a motivational interviewing intervention on weight loss, physical activity and cardiovascular disease risk factors: a randomised controlled trial with a 12-month post-intervention follow-up

Outcome

Time

Analysisa

 

Baseline

6-Months

18-Months

Time x Group (F)

Effect sizeb

Total Met Minutes/wk

     

   Intervention

1854.08 (2174.67)

2351.24 (2537.69)

3153.67 (3393.64)

2.59

.016

   Control

2278.56 (2820.37)

2265.15 (2680.87)

3272.10 (3874.99)

  

Walking Met Minutes/wk

     

   Intervention

996.07 (1116.59)

1195.54 (1277.60)

1265.14 (1352.25)

5.46**

.040

   Control

1242.45 (1432.69)

1050.49 (1344.35)

1327.70 (1641.78)

  

Moderate Met Minutes/wk

     

   Intervention

440.69 (1091.22)

531.72 (1150.98)

861.61 (1526.16)

1.18

.008

   Control

576.15 (1159.23)

514.02 (968.80)

1086.24 (1670.45)

  

Vigorous Met Minutes p/wk

     

   Intervention

590.05 (1294.38)

736.72 (1410.47)

1060.74 (2119.54)

1.01

.007

   Control

746.55 (1672.04)

744.78 (1471.29)

972.04 (2023.38)

  

Stage of Change

     

   Intervention

3.22 (1.36)

3.63 (1.35)

3.19 (1.61)

4.80**

.033

   Control

3.47 (1.40)

3.47 (1.45)

2.87 (1.68)

  

BMI

     

   Intervention

33. 66 (5.12)

33.53 (4.58)

33.68 (4.77)

4.11*

.028

   Control

33.37 (4.47)

33.43 (5.07)

34.04 (4.88)

  

Bodyweight

     

   Intervention

93.64 (15.93)

93.02 (15.55)

94.12 (15.66)

1.95

.013

   Control

91.38 (16.88)

91.51 (17.41)

92.75 (17.37)

  

SBP (mmHg)

     

   Intervention

133.12 (16.53)

130.25 (15.78)

128.98 (14.43)

1.71

.012

   Control

132.41 (17.33)

131.81 (17.45)

129.96 (17.75)

  

DBP (mmHg)

     

   Intervention

83.42 (9.63)

81.52 (8.57)

82.40 (9.03)

5.55**

.038

  Control

81.92 (9.27)

82.70 (8.98)

82.81 (8.13)

  

Cholesterol (mmol.l-1)

     

   Intervention

5.51 (1.01)

5.37 (1.05)

5.36 (1.03)

5.84**

.042

  Control

5.39 (0.93)

5.37 (1.03)

5.52 (1.03)

  

HDL (mmol.l-1)

     

   Intervention

1.46 (0.38)

1.41 (0.39)

1.33 (0.35)

0.02

.000

  Control

1.52 (0.43)

1.47 (0.43)

1.39 (0.41)

  

LDL (mmol.l-1)

     

   Intervention

2.96 (1.14)

3.06 (0.99)

3.28 (1.05)

1.29

.010

  Control

3.01 (1.08)

3.27 (0.97)

3.48 (0.94)

  

Triglycerides (mmol.l-1)

     

   Intervention

1.96 (0.79)

1.77 (1.25)

1.65 (1.01)

0.46

.004

  Control

1.77 (1.02)

1.61 (0.79)

1.55 (0.78)

  

Fat Intake (% fat intake per day)

     

   Intervention

23.87 (7.67)

22.93 (7.03)

22.97 (7.26)

4.41*

.028

  Control

23.89 (7.70)

20.97 (6.46)

20.41 (5.96)

  

Fruit & Vegetable Intake (portions per day)

     

   Intervention

6.31 (4.02)

7.33 (4.25)

6.30 (3.76)

0.78

.005

  Control

6.94 (4.48)

7.58 (4.85)

6.23 (3.58)

  
  1. Note. Figures in parentheses are standard errors. aF-ratio representing interaction effect of time by group on dependent variable; bPartial eta-squared (η2p). BMI = Body mass index; SBP = Systolic blood pressure; DBP = Diastolic blood pressure; HDL = High density lipoproteins; LDL = Low density lipoproteins.
  2. * p < .05.
  3. ** p < .01.
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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