Table 2 Pregnancy and offspring characteristics stratified by maternal height in quintiles 1
From: Do parental heights influence pregnancy length?: a population-based prospective study, HUNT 2
Pregnancy characteristics | Maternal height by quintiles(cm) | |||||
|---|---|---|---|---|---|---|
<163 | 163-165 | 166-168 | 169-172 | >173 | ||
n=1192 | n=930 | n=1032 | n=1053 | n=803 | P for trend | |
Mean age at delivery, years (SE) | 30.3(0.2) | 30.5(0.2) | 30.3(0.2) | 30.2(0.2) | 30.6(0.17) | 0.83 |
Mean time from baseline to delivery, years (SE) | 4.2(0,1) | 4.3(0.1) | 4.3(0.1) | 4.4(0.1) | 4.4(0.1) | 0.01 |
Mean pregnancy length, days, LMP-based (SE)2 | 279.3(0.5) | 280.2(0.5) | 281.5(0.6) | 281.5(0.5) | 282.0(0.6) | <0.0001 |
Mean pregnancy length, days, US-based (SE)3 | 276.7(0.5) | 277.9(0.5) | 279.2(0.6) | 280.1(0.5) | 280.9(0.5) | <0.0001 |
Primiparous mother (%)4 | 327(27) | 241(26) | 300(29) | 309(29) | 236(29) | 0.06 |
Mean birth weight, grams (SE)5 | 3490(20) | 3618(21) | 3655(22) | 3692(20) | 3803(25) | <0.0001 |
Male fetal sex (%) | 626(52.5) | 495(53.2) | 531(51.5) | 574(54.5) | 402(50.1) | 0.61 |
Onset of labour (%) | ||||||
Spontaneous | 873(73.2) | 740(79.6) | 835(80.9) | 868(82.4) | 624(77.7) | 0.002 |
Medically induced | 144(12.1) | 111(11.9) | 137(13.3) | 127(12.1) | 114(14.2) | 0.26 |
CS before labour6 | 175(14.7) | 79(8,5) | 60(5.8) | 58(5.5) | 65(8.1) | <0.0001 |
CS, total number (%)7 | 302(25) | 162(17) | 133(13) | 100(9.5) | 100(12.5) | <0.0001 |
Acute CS8 | 154(17.9) | 64(6.9) | 52(5.0) | 48(4.6) | 49(6.1) | <0.0001 |
Elective CS9 | 148(12.4) | 98(10.5) | 81(7.9) | 52(4.9) | 51(6.4) | <0.0001 |
SGA < 2.5 percentile (%)10 | 41(3.4) | 12(1.3) | 18(1.8) | 13(1.2) | 9(1.1) | 0.001 |
Preeclampsia (%) | 50(4.2) | 27(2.9) | 40(3.9) | 31(2.9) | 30(3.7) | 0.52 |
Stillbirth (%)11 | 4(0.3) | 3(0.3) | 4(0.4) | 4(0.4) | 2(0.3) | 0.89 |