Table 7.

Predictors of aggregated preeclampsia, severe preeclampsia/eclampsia, and mild preeclampsia in New York City, 1995–2004

	% of all births	Aggregated		Severe/eclampsia		Mild
		Crude OR	Adjusteda OR (95 % CL)	Crude OR	Adjusteda OR (95 % CL)	Crude OR	Adjusteda OR (95 % CL)
Total number of births (#, %)	788,454	35,048 (3.68)		8,316 (0.87)		26,732 (2.83)
Year
1995–1998	35.4	1.0	1.0	1.0	1.0	1.0	1.0
1999–2001	30.1	0.9	0.9 (0.9, 1.0)	1.0	1.1 (1.0, 1.1)	0.9	0.9 (0.9, 0.9)
2002–2004	34.6	0.9	0.9 (0.9, 0.9)	1.0	1.0 (1.0, 1.1)	0.9	0.9 (0.8, 0.9)
Maternal age (years)
< 20	9.2	1.8	1.1 (1.0, 1.1)	1.4	0.8 (0.8, 0.9)	2.0	1.1 (1.1, 1.2)
20–24	22.4	1.2	0.9 (0.9, 1.0)	1.0	0.8 (0.8, 0.9)	1.3	1.0 (0.9, 1.0)
25–29	26.5	1.0	1.0	1.0	1.0	1.0	1.0
30–34	24.9	1.0	1.1 (1.1, 1.1)	1.0	1.1 (1.0, 1.2)	1.0	1.1 (1.1, 1.1)
≥35	17.0	1.2	1.5 (1.4, 1.6)	1.3	1.6 (1.4, 1.7)	1.2	1.5 (1.4, 1.6)
Maternal race/ethnicity
Non-Hispanic White	23.3	1.0	1.0	1.0	1.0	1.0	1.0
Black	21.7	1.9	1.6 (1.5, 1.7)	2.0	1.9 (1.8, 2.1)	1.9	1.5 (1.5, 1.6)
Hispanic	20.0	1.7	1.6 (1.5, 1.7)	1.8	1.8 (1.7, 2.0)	1.7	1.5 (1.5, 1.6)
Asian	8.2	0.7	0.8 (0.7, 0.8)	0.7	0.7 (0.6, 0.8)	0.7	0.8 (0.7, 0.8)
Unknown/other	26.7	1.4	1.3 (1.3, 1.4)	1.6	1.6 (1.5, 1.8)	1.4	1.2 (1.2, 1.3)
Insurance
Private	41.9	1.0	1.0	1.0	1.0	1.0	1.0
Public	54.7	1.3	1.2 (1.2, 1.3)	1.2	1.2 (1.1, 1.3)	1.4	1.3 (1.2, 1.3)
Self-pay	3.4	1.2	1.2 (1.1, 1.2)	1.1	1.1 (1.0, 1.3)	1.2	1.2 (1.1, 1.3)
Parity
0	45.3	1.0	1.0	1.0	1.0	1.0	1.0
1	30.4	0.5	0.4 (0.4, 0.4)	0.5	0.5 (0.4, 0.5)	0.5	0.4 (0.4, 0.4)
≥2	24.3	0.5	0.4 (0.3, 0.4)	0.6	0.4 (0.4, 0.4)	0.5	0.3 (0.3, 0.4)
Maternal education (years)
< 12	24.9	1.1	1.1 (1.1, 1.1)	1.1	1.0 (1.0, 1.1)	1.1	1.1 (1.1, 1.2)
12	32.8	1.0	1.0	1.0	1.0	1.0	1.0
13–16	31.5	1.0	0.9 (0.9, 1.0)	1.0	0.9 (0.8, 0.9)	1.0	0.9 (0.9, 1.0)
> 16	10.9	0.7	0.7 (0.7, 0.8)	0.8	0.7 (0.7, 0.8)	0.7	0.7 (0.7, 0.8)
Prenatal smoking
No	96.8	1.0	1.0	1.0	1.0	1.0	1.0
Yes	3.2	0.8	0.8 (0.8, 0.9)	0.8	0.8 (0.7, 0.9)	0.9	0.8 (0.8, 0.9)
Prenatal care
None or started in 3rd trimester	7.7	1.0	0.9 (0.9, 1.0)	1.0	0.9 (0.8, 1.0)	1.1	0.9 (0.9, 1.0)
Started 1st trimester	66.8	1.0	1.0	1.0	1.0	1.0	1.0
Started 2nd trimester	25.5	1.0	0.9 (0.9, 1.0)	0.9	0.9 (0.8, 1.0)	1.0	0.9 (0.9, 1.0)
Pre-pregnancy weight quintiles (lbs)
≤118	21.5	1.0	1.0	1.0	1.0	1.0	1.0
> 118 to ≤130	23.0	1.2	1.2 (1.1, 1.2)	1.2	1.2 (1.1, 1.3)	1.2	1.2 (1.2, 1.3)
> 130 to ≤142	16.0	1.3	1.4 (1.3, 1.4)	1.3	1.2 (1.1, 1.4)	1.4	1.4 (1.3, 1.5)
> 142 to ≤165	20.8	1.6	1.7 (1.6, 1.8)	1.4	1.4 (1.3, 1.6)	1.7	1.8 (1.7, 1.9)
> 165	18.7	2.3	2.4 (2.3, 2.5)	1.8	1.8 (1.6, 1.9)	2.4	2.6 (2.5, 2.8)

^aMutually adjusted for all other variables in the table