Table 2. Adjusted HRs for lipid disorders associated with gestational age at birth, Sweden, 1973–2016.

Gestational age at birth	Cases	Ratea	Unadjusted		Adjusted for child characteristicsb		Adjusted for child and maternal characteristicsc
			HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P
Preterm (<37 wks)	1,426	101.89	1.32 (1.25–1.40)	<0.001	1.29 (1.22–1.36)	<0.001	1.23 (1.16–1.29)	<0.001
Extremely preterm (22–27 wks)	31	148.78	2.24 (1.57–3.18)	<0.001	2.11 (1.49–3.01)	<0.001	2.00 (1.41–2.85)	<0.001
Very preterm (28–33 wks)	301	111.64	1.47 (1.31–1.64)	<0.001	1.42 (1.26–1.59)	<0.001	1.33 (1.19–1.49)	<0.001
Late preterm (34–36 wks)	1,094	98.63	1.27 (1.20–1.36)	<0.001	1.24 (1.17–1.32)	<0.001	1.19 (1.12–1.26)	<0.001
Early term (37–38 wks)	4,187	85.99	1.15 (1.11–1.19)	<0.001	1.11 (1.08–1.15)	<0.001	1.09 (1.05–1.13)	<0.001
Full term (39–41 wks)	16,712	80.12	Reference		Reference		Reference
Post term (≥42 wks)	2,725	87.04	0.96 (0.93–1.00)	0.08	1.00 (0.96–1.04)	0.93	0.99 (0.95–1.03)	0.62
Per additional 5 weeks (trend)			0.80 (0.77–0.82)	<0.001	0.83 (0.81–0.86)	<0.001	0.86 (0.83–0.89)	<0.001

^aIncidence rate per 100,000 person-years.

^bAdjusted for birth year, sex, and birth order.

^cAdjusted for birth year, sex, birth order, and maternal characteristics (age, education, birth country or region, body mass index, history of lipid disorder).

Abbreviations: HR, hazard ratio