Table 1. Prevalence of demographic characteristics by sexual orientation among U.S. women in the Nurses’ Health Study II (1991-2011).
| Heterosexual (n=98,317) | Lesbian (n=926) | p- valuea | Bisexual (n=415) | p- valuea | |
|---|---|---|---|---|---|
| Age group in 1991b | <0.001 | 0.46 | |||
| 26-30 | 14.0% | 11.0% | 12. 5% | ||
| 31-35 | 30.2% | 26.8% | 27.7% | ||
| 35-40 | 34.4% | 36.8% | 36.9% | ||
| 41-46 | 21.5% | 25.4% | 22.9% | ||
|
| |||||
| Race/ethnicityb | 0.28 | 0.003 | |||
| Non-Hispanic White | 92.7% | 93.6% | 88. 9% | ||
| Other | 7.3% | 6.3% | 11.1% | ||
|
| |||||
| Income in 2001b | <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 | 24.1% | 21.7% | 18.3% | ||
| Missing | 30.9% | 21.9% | 19.5% | ||
|
| |||||
| Region of residencec | |||||
| Northeast | 32.9% | 31.7% | 0.48 | 34.4% | 0.32 |
| Midwest | 32.7% | 23.5% | <0.001 | 21.0% | <0.001 |
| South | 19.0% | 19.3% | 0.88 | 16.2% | 0.16 |
| West | 15.2% | 25.4% | <0.001 | 28.1% | <0.001 |
|
| |||||
| Ruralc | 31.7% | 21.8% | <0.001 | 28.0% | 0.08 |
a
calculated from Wald chi-square test; compared to heterosexual women
b
time invariant demographic characteristic
c
time varying demographic characteristic; age-standardized prevalence was calculated over all available waves of data