Table 1.
Sociodemographic characteristics of heterosexual and LB women in the NHS II, 1989–2013
| Heterosexual | LB | |
|---|---|---|
| Sample size, n | 92,983 | 1,267 |
| Person-years, n | 2,230,488 | 29,984 |
| Age in years during follow-up | 45.7 (8.8) | 46.3 (8.8) |
| Non-Hispanic white | 95 | 95 |
| Region of residence | ||
| Northeast | 33 | 33 |
| Midwest | 33 | 22 |
| South | 19 | 18 |
| West | 15 | 27 |
| Rural status (population density <500 people/square mile) | 32 | 24 |
| Menopausal status | ||
| Premenopausal | 69 | 66 |
| Postmenopausal, never used postmenopausal hormones | 9 | 11 |
| Postmenopausal, previously used postmenopausal hormones | 12 | 13 |
| Postmenopausal, currently using postmenopausal hormones | 10 | 10 |
| Visited health care provider during past 2 years | 94 | 93 |
| Family history of diabetes | 15 | 16 |
| BMI, kg/m2 | 26.0 (5.8) | 27.5 (6.8) |
Data are mean (SD) or percent unless otherwise indicated.