Table 1.
Baseline characteristics of 1407 women in the Study of Women’s Health Across the Nation with an observed natural final menstrual period and without diabetes at baseline
| All | Incident diabetes | ||
|---|---|---|---|
| No | Yes | ||
| Number of women | 1407 | 1275 | 132 |
| Mean ± sd age, years | 46.4 ± 2.7 | 46.4 ± 2.7 | 46.8 ± 2.8 |
| Mean ± sd age at FMP, years | 51.8 ± 2.7 | 51.8 ± 2.8 | 51.8 ± 2.5 |
| Menopausal status, %* | |||
| Pre-menopause | 57.3 | 58.1 | 49.2 |
| Early peri-menopause | 42.7 | 41.9 | 50.8 |
| Race/ethnicity‡, % | |||
| White | 43.6 | 45.0 | 29.6 |
| Black | 28.8 | 26.6 | 50.0 |
| Hispanic | 5.9 | 5.5 | 9.9 |
| Chinese | 10.3 | 11.0 | 3.8 |
| Japanese | 11.4 | 11.9 | 6.8 |
| Education‡, % | |||
| < High school | 6.7 | 5.8 | 15.4 |
| High school | 16.6 | 15.9 | 23.1 |
| Some college | 31.3 | 31.1 | 33.1 |
| 4-year college | 21.9 | 22.6 | 15.4 |
| >4-year college | 23.5 | 24.6 | 13.1 |
| Site‡, % | |||
| Detroit, MI | 16.4 | 14.9 | 30.3 |
| Boston, MA | 15.2 | 15.2 | 15.2 |
| Chicago, IL | 14.9 | 14.6 | 17.4 |
| Oakland, CA | 16.2 | 17.2 | 6.8 |
| Los Angeles, CA | 16.8 | 17.5 | 9.9 |
| Newark, NJ | 8.8 | 8.6 | 10.6 |
| Pittsburgh, PA | 11.8 | 12.0 | 9.9 |
| Smoking status†, % | |||
| Never | 59.8 | 60.5 | 53.0 |
| Former | 23.7 | 24.1 | 20.5 |
| Current | 16.4 | 15.4 | 26.5 |
| Obesity, % | 28.5 | 25.3 | 59.1 |
| Sex hormone, median (Q1, Q3) | |||
| Oestradiol*, pmol/L | 211.4 (121.1, 322.2) | 213.6 (124.4, 324.4) | 160.4 (113.8, 274.9) |
| FSH, IU/L | 16.5 (11.4, 27.6) | 16.6 (11.3, 27.6) | 16.2 (11.6, 27.1) |
*
P<0.05,
†
P<0.01,
‡
P<0.0001 based on chi-squared test for categorical variables and Wilcoxon rank-sum test for continuous variables for comparing those with and without incident diabetes.