Table 2

ORs with 95% CI for no and one lifetime pregnancy (reference: women with ≥2 pregnancies) by prepregnant lipid quintiles in 4322 women in the Cohort of Norway, 1994–2003

Lipid quintiles* in mmol/Ln (%)na (%)nb (%)NulliparousOne-child mothers
NOR (95% CI)OR (95% CI)P for trend
LDL cholesterol†0.82
 <2.42449 (56.9)261 (33.0)80 (10.1)7901.0 (reference)1.0 (reference)
 2.43–2.84433 (52.3)309 (37.4)85 (10.3)8271.1 (0.9 to 1.4)1.0 (0.7 to 1.4)
 2.85–3.24454 (52.2)325 (37.4)90 (10.4)8691.0 (0.8 to 1.3)0.9 (0.7 to 1.3)
 3.25–3.76426 (48.0)353 (39.8)108 (12.2)8871.1 (0.7 to 1.2)1.1 (0.8 to 1.6)
 >3.77391 (41.9)421 (45.1)121 (13.0)9331.2 (0.7 to 1.1)1.2 (0.8 to 1.7)
Total cholesterol0.26
 <4.19432 (55.0)259 (33.0)94 (12.0)7851.0 (reference)1.0 (reference)
 4.20–4.61456 (54.6)304 (36.4)75 (9.0)8351.2 (0.9 to 1.5)0.8 (0.5 to 1.1)
 4.62–5.0434 (52.2)306 (36.8)91 (11.0)8311.0 (0.8 to 1.3)0.9 (0.6 to 1.2)
 5.1–5.63442 (45.7)415 (43.0)109 (11.3)9661.3 (1.0 to 1.7)1.0 (0.7 to 1.4)
 >5.64393 (43.4)393 (43.4)119 (13.1)9051.2 (0.9 to 1.6)1.0 (0.7 to 1.4)
TG0.01
 <0.66429 (48.6)372 (42.2)81 (9.2)8821.0 (reference)1.0 (reference)
 0.67–0.86447 (49.8)350 (39.0)100 (11.1)8970.9 (0.7 to 1.1)1.2 (0.8 to 1.7)
 0.87–1.09455 (54.4)294 (35.1)88 (10.5)8370.9 (0.7 to 1.2)1.3 (0.9 to 1.9)
 1.10–1.45452 (53.6)303 (35.9)88 (10.4)8431.0 (0.8 to 1.3)1.4 (1.0 to 2.0)
 >1.46373 (43.3)358 (41.6)130 (15.1)8611.1 (0.9 to 1.5)2.2 (1.5 to 3.2)
HDL cholesterol0.18
 <1.20326 (47.5)263 (38.3)97 (14.1)6861.0 (0.8 to 1.3)1.7 (1.2 to 2.4)
 1.21–1.40271 (44.7)260 (42.9)75 (12.4)6061.0 (0.8 to 1.2)1.2 (0.8 to 1.7)
 1.41–1.60634 (53.0)431 (36.1)130 (10.9)11951.0 (0.7 to 1.3)1.2 (0.9 to 1.6)
 1.61–1.84443 (49.7)356 (40.0)92 (10.3)8910.9 (0.7 to 1.2)1.1 (0.8 to 1.5)
 >1.85483 (51.2)367 (38.9)94 (10.0)9441.0 (reference)1.0 (reference)
  • The estimates were obtained by multinomial logistic regression and adjusted for age at examination, educational level, smoking, time since last meal, oral contraceptive use and body mass index (linear term).

  • Number of women: with ≥2 children (n, reference group), nulliparous women (na), one-child mothers (nb) and total number of women within the category (N).

  • *Quintiles calculated on a total sample prior to pregnancy.

  • †Missing data within lipids on 16 cases of LDL and 2 cases of TG.

  • HDL, high-density lipoprotein; LDL, low-density lipoprotein; TG, triglycerides.