Table 1.

Prevalence of Demographics Over Repeated Measures by Sexual Orientation Among U.S. Women in Nurses' Health Study II (1989–2009)

	Heterosexual (n = 98,317), %	Lesbian (n = 926), %	pa	Bisexual (n = 415), %	pa
Age group in 1989			<0.001		0.14
24–30 years	22.6	17.2		19.3
31–35 years	34.4	34.9		32.3
36–40 years	31.5	33.9		35.7
41–44 years	11.5	14.0		12.8
Race/ethnicity			0.28		0.003
Non-Hispanic white	92.7	93.6		88.9
Other	7.3	6.4		11.1
Household income in 2001			<0.001		<0.001
<$50,000	11.3	17.2		21.9
$50,000–$75,000	19.1	25.4		25.5
$75,000–$100,000	14.7	13.8		14.7
>$100,000	21.4	21.7		18.3
Missing	30.9	21.9		19.5
Region of residenceb,c
Northeast	33.2	32.4	0.64	35.5	0.34
Midwest	32.9	23.7	<0.001	21.4	<0.001
South	18.6	18.7	0.98	15.5	0.04
West	15.1	25.1	<0.001	27.3	<0.001
Rural livingb,c	30.4	21.0	<0.001	26.7	<0.07

^aCalculated from Wald chi-square test; compared with heterosexual women.

^bAge-standardized prevalence over all available waves for region of residence and rural living.

^cp-Values for region of residence were calculated from separate logistic regression repeated measures models.