Skip to main content

Table 2 Differences in mean ± SD GI and numbers of women within each quartile of GI between the intervention and control group from trimester 1 to trimester 3

From: The influence of a low glycemic index dietary intervention on maternal dietary intake, glycemic index and gestational weight gain during pregnancy: a randomized controlled trial

 

Trimester 1

Trimester 2

Trimester 3

P2

 

I

C

I

C

I

C

 

GI

57.3 ± 4

57.7 ± 4

56.1 ± 4

57.8 ± 4

56 ± 3.7

57.7 ± 3.9

<0.001

 

P 0.251

P <0.0011

P <0.0011

 
 

N (%)

N (%)

N (%)

 

Quartile GI

       

1*

37.4

32.2

50.2

30.5

51.5

31.2

 

2

16.2

20.0

13.6

19.3

16.2

19.3

 

3

23.4

19.3

18.3

22.1

17.9

23.9

 

4

23.0

28.4

17.9

28.1

14.5

25.6

 
 

P 0.213

P <0.0013

P <0.0013

 
  1. C, control group (n = 285); I, intervention group (n = 235).
  2. *Quartile 1 (GI values 49.7 - 55.9); quartile 2 (GI values 56.0 -57.6); quartile 3 (GI values 57.7 – 59.9); quartile 4 (GI values 60.0 – 69.7).
  3. 1Differences in mean GI between groups across trimesters were compared using independent samples t-test.
  4. 2Differences in mean GI between trimester 1 and 2 and trimesters 1 and 3 within the intervention group assessed by ANOVA.
  5. 3Differences in numbers of women within each quartile of GI between groups were compared using the χ 2 test.