From: Do parental heights influence pregnancy length?: a population-based prospective study, HUNT 2
Difference in pregnancy length (days) | ||||||||
---|---|---|---|---|---|---|---|---|
Crude estimate2 | Adjusted for obstetric and socioeconomic factors3 | Additional adjustment for maternal cardiovascular risk factors4 | ||||||
Paternal height (in quintiles) | N | Mean difference | Mean difference | 95% CI | p for trend | Mean difference | 95% CI | p for trend |
Estimated date of delivery based on US | ||||||||
≤ 175 | 503 | 0 | 0 | Ref | 0 | Ref | ||
176-178 | 397 | 0.2 | −0.2 | −2.0,1.7 | −0.5 | −2.4,1.4 | ||
179-181 | 448 | −0.1 | −0.6 | −2.4,1.3 | −0.8 | −2.6,1.1 | ||
182-185 | 412 | 0.6 | −0.5 | −2.2,1.6 | −0.8 | −2.7,1.1 | ||
≥186 | 399 | 0.5 | −0.7 | −2.5,1.0 | 0.43 | −0.7 | −2.5,1.0 | 0.39 |
Estimated date of delivery based on LMP | ||||||||
≤ 175 | 642 | 0 | 0 | Ref | 0 | Ref | ||
176-178 | 496 | 0.2 | 0.0 | −1.9,1.9 | −0.2 | −2.0,1.7 | ||
179-181 | 514 | 0.2 | −0.1 | −1.9,1.6 | −0.3 | −2.0,1.5 | ||
182-185 | 552 | −0.6 | −1.2 | −3.0,0.7 | −1.4 | −3.2,0.5 | ||
≥186 | 512 | −0.3 | −0.9 | −2.7,0.9 | 0.17 | −0.9 | −2.7,0.9 | 0.16 |