Table 6

Odds ratio (OR) for preterm delivery and post-term delivery by maternal height1
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

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.

Myklestad et al.

Myklestad et al. BMC Pregnancy and Childbirth 2013 13:33   doi:10.1186/1471-2393-13-33

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