Table 7

Odds ratio (OR) for preterm delivery and post-term delivery by maternal height1 restricted to pregnancies with spontaneous onset of delivery2
Preterm delivery (< 37.0) weeks Post term delivery (>42.0 weeks)
Maternal height (in quintiles) Cases/non-cases Crude estimate3 Adjusted estimate4 95% CI p for trend Cases/non-cases Crude estimate3 Adjusted estimate4 95% CI p for trend
Estimated date of delivery based on US
 <163 25/662 1.0 1.0 Ref 22/665 1.0 1.0 Ref
 163-165 18/575 0.8 0.8 0.4,1.5 15/578 0.8 0.8 0.4,1.6
 166-168 17/637 0.7 0.7 0.3,1.3 36/618 1.8 1.8 1.0,3.1
 169-172 18/685 0.7 0.7 0.4,1.3 29/674 1.3 1.4 0.8,2.5
 173+ 12/497 0.6 0.6 0.3,1.4 0.18 27/482 1.7 1.9 1.0,3.4 0.01
Estimated date of delivery based on LMP
 <163 42/808 1.0 1.0 Ref 87/763 1.0 1.0 Ref
 163-165 19/704 0.5 0.5 0.3,0.9 71/652 1.0 1.0 0.7,1.4
 166-168 25/783 0.6 0.6 0.3,1.0 109/699 1.4 1.4 1.0,1.9
 169-172 27/812 0.6 0.6 0.4,1.1 94/745 1.1 1.2 0.8,1.6
 173+ 25/586 0.8 0.8 0.5,1.4 0.52 76/535 1.3 1.3 0.9,1.9 0.06

1Pregnancy length according to date of delivery estimated by ultrasound (3146 pregnancies) and by last menstrual period (3831 pregnancies). 2After exclusion of pregnancies with induced onset of delivery (medically or by Caesarean section). 3Adjusted for maternal age at HUNT participation. 4Additionally 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.

Pregnancies restricted to spontaneous onset of delivery2.

Myklestad et al.

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

Open Data