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Table 6 Odds ratio (OR) for preterm delivery and post-term delivery by maternal height 1

From: Do parental heights influence pregnancy length?: a population-based prospective study, HUNT 2

 

Preterm delivery(< 37.0) weeks

Post term delivery(>42.0 weeks)

Maternal height (in quintiles)

Cases/non-cases

Crude estimate2

Adjusted estimate3

95% CI

p for trend

Cases/non-cases

Crude estimate2

Adjusted estimate3

95% CI

p for trend

Estimated date of delivery based on US

 <163

62/895

1.0

1.0

Ref

 

43/914

1.0

1.0

Ref

 

 163-165

39/712

0.8

0.8

0.5,1.2

 

32/719

0.9

1.0

0.6,1.6

 

 166-168

43/768

0.8

0.8

0.5,1.2

 

60/751

1.7

1.7

1.1,2.6

 

 169-172

30/826

0.5

0.5

0.3,0.9

 

58/798

1.5

1.6

1.1,2.5

 

 173+

28/635

0.6

0.6

0.4,1.0

0.015

55/608

1.9

2.1

1.4,3.2

<0.0001

Estimated date of delivery based on LMP

 <163

76/1072

1.0

1.0

Ref

 

112/1036

1.0

1.0

Ref

 

 163-165

41/862

0.7

0.6

0.4,1.0

 

91/812

1.0

1.0

0.8,1.4

 

 166-168

52/945

0.8

0.8

0.5,1.1

 

143/854

1.5

1.5

1.2,2.0

 

 169-172

42/979

0.6

0.6

0.4,0.9

 

129/892

1.3

1.4

1.0,1.8

 

 173+

45/732

0.9

0.9

0.6,1.3

0.32

105/672

1.5

1.5

1.1,2.0

0.001

  1. 1Pregnancy length according to date of delivery estimated by ultrasound (US) (4038 pregnancies) and by first day of last menstrual period (LMP) (4846 pregnancies). 2Adjusted for maternal age at HUNT participation. 3Additionally adjusted for maternal age at birth, duration between baseline (maternal participation in HUNT 2) and delivery, maternal education, parity, smoking, receiving social security benefits, pre-pregnancy maternal hypertension, diabetes mellitus, kidney and heart disease, BMI, systolic and diastolic blood pressure, blood concentration of glucose and lipids.