Table 3.

ORs for quartiles of plasma lipids related to PTB, stratified by baseline parity status^a

	Nulliparous at baseline (n = 704)b		Parous at baseline (n = 306)b
	34 to <37 wk (n = 100)	<34 wk (n = 48)	34 to <37 wk (n = 46)	<34 wk (n = 24)
Total cholesterol
4	0.93 (0.48, 1.81)	2.05 (0.78, 5.34)	2.92 (1.04, 8.19)	2.64 (0.49, 14.19)
3	1.11 (0.59, 2.09)	1.76 (0.66, 4.65)	2.07 (0.69, 6.22)	2.92 (0.53, 16.06)
2	Referent	Referent	Referent	Referent
1	1.90 (1.04, 3.48)	2.35 (0.90, 6.16)	1.92 (0.64, 5.74)	5.62 (1.13, 27.96)
LDL cholesterol
4	0.87 (0.44, 1.73)	0.79 (0.33, 1.85)	1.44 (0.59, 3.50)	0.92 (0.21, 4.09)
3	0.97 (0.50, 1.88)	0.78 (0.33, 1.81)	1.03 (0.39,2.74)	1.92 (0.51, 7.29)
2	Referent	Referent	Referent	Referent
1	1.95 (1.06, 3.58)	0.81 (0.34, 1.94)	0.89 (0.31, 2.55)	2.85 (0.75, 10.86)
Triglycerides
4	1.11 (0.58, 2.13)	0.81 (0.33, 2.00)	0.67 (0.27, 1.68)	1.91 (0.35, 10.62)
3	1.22 (0.65, 2.28)	0.98 (0.43, 2.23)	0.68 (0.28, 1.69)	2.51 (0.48, 13.03)
2	Referent	Referent	Referent	Referent
1	1.34 (0.74, 2.44)	0.79 (0.35, 1.79)	0.79 (0.28, 2.21)	4.66 (0.92, 23.64)
HDL cholesterol
4	1.04 (0.58, 1.85)	1.17 (0.48, 2.83)	4.41 (1.56, 12.48)	1.85 (0.60, 5.73)
3	0.76 (0.41, 1.39)	1.23 (0.52, 2.88)	1.76 (0.55, 5.60)	0.50 (0.10, 2.64)
2	Referent	Referent	Referent	Referent
1	0.64 (0.32, 1.26)	1.37 (0.55, 3.43)	2.53 (0.93, 6.90)	1.03 (0.31, 3.41)

^aReferents are women with term births (n = 556 for nulliparas; n = 236 for multiparas). 

^bAdjusted for race, BMI, physical activity at baseline, age at selected birth, ever gestational hypertension or preeclampsia during follow-up, time interval from baseline measurement to selected birth.