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Table 3 Group difference in prevalence of weight status at T4

From: Parental support in promoting children’s health behaviours and preventing overweight and obesity – a long-term follow-up of the cluster-randomised healthy school start study II trial

 

T1

T4

  
 

Intervention (I1) n = 178

Control (C1) n = 181

Intervention (I4) n = 96

Control (C4)n = 113

Difference T1-T4

 

Weight statusa (%)

n

%

n

%

n

%

n

%

DD = (I 4 -I 1 )-(C 4 -C 1 )

p

Underweight

11

6.2

11

6.1

6

6.3

6

5.3

0.9

0.99

Normal weight

121

67.7

122

67.4

52

54.2

72

63.7

−9,8

0.06

Overweight

30

16.9

25

13.8

26

27.1

24

21.2

2.8

0.71

Obesity

16

9.0

23

12.7

12

12.5

11

9.7

6.5

0.12

  1. Results of independent samples t-test
  2. DD difference in difference
  3. p = between intervention and control groups
  4. Subjects are dependent observations between T1 and T4 with valid measurements at T2
  5. aDefined according to Cole et al. [21]
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