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Table 2 Infant weight at follow-up visits and the estimated mean weight differences between the groups

From: Lifestyle intervention to prevent excessive maternal weight gain: mother and infant follow-up at 12 months postpartum

Age

 

Control group

Intervention group

Unadjusted effect size (95 % CI)

Pa

Adjusted effect size (95%CI)

Pb

3rd to 10th day

n

72

151

    

Time after birth (days)

3 (3–4)

3 (2–3.25)

    

Weight (g)

3200 ± 414

3227 ± 392

27 (−86, 139)

0.640

21 (−23, 65)

0.283

4th to 6th week

n

73

153

    

Time after birth (days)

33 (29–37)

32 (28–37)

    

Weight (g)

4362 ± 607

4346 ± 499

−16 (−166, 134)

0.832

−29 (−150, 93)

0.584

3rd to 4th month

n

72

154

    

Time after birth (days)

103 (93–113)

103 (93–114)

    

Weight (g)

6395 ± 920

6209 ± 725

−186 (−409, 37)

0.102

−191 (−466, 84)

0.140

6th to 7th month

n

70

151

    

Time after birth (days)

191 (182–206)

195 (182–208)

    

Weight (g)

8079 ± 1085

7845 ± 859

−234 (−501, 33)

0.085

−209 (−511, 93)

0.142

10th to 12th month

n

70

150

    

Time after birth (days)

365 (350–377)

358 (342–371)

    

Weight (g)

9736 ± 999

9382 ± 931

−354 (−626, −82)

0.011

−257 (−578, 65)

0.099

  1. Data are given as means ± SD or median (interquartile range)
  2. Effect sizes from regression models as estimated marginal mean difference (95 % CI)
  3. a unadjusted model
  4. b linear mixed model adjusted for practice (random factor), maternal age and pre-pregnancy BMI, infant age at follow-up and birth weight