Table 1.
Baseline characteristics of the study sample by ethnicity
| Variable | Full Sample N=1862 |
Caucasian N=911 |
Afr. American N=450 |
Hispanic N=113 |
Chinese N=186 |
Japanese N=202 |
P-value for Ethnic Differences |
|---|---|---|---|---|---|---|---|
| Demographics | |||||||
| Age * | 46.0 (4.13) | 45.7 (4.07) | 45.8 (4.09) | 46.3 (3.53) | 46.5 (3.88) | 46.9 (4.19) | 0.009 |
| Education | <0.001 | ||||||
| ≤ High School | 21% | 12% | 25% | 71% | 27% | 18% | |
| > High School | 32% | 31% | 40% | 21% | 21% | 34% | |
| ≥College | 47% | 57% | 35% | 8% | 52% | 48% | |
| Menopause Status | 0.008 | ||||||
| Early perimenopause | 43% | 45% | 49% | 39% | 34% | 35% | |
| Premenopause | 57% | 55% | 51% | 61% | 66% | 65% | |
| Tobacco use | <0.001 | ||||||
| Never | 61% | 55% | 57% | 70% | 95% | 64% | |
| Previous | 25% | 33% | 21% | 18% | 4% | 23% | |
| Current | 14% | 12% | 22% | 13% | 1% | 13% | |
| Alcohol consumption | <0.001 | ||||||
| None | 48% | 36% | 56% | 45% | 81% | 55% | |
| < median (31.2 Kcal) | 26% | 29% | 23% | 39% | 14% | 21% | |
| > median | 26% | 35% | 21% | 16% | 5% | 24% | |
| Physical activity score * | 7.75 (2.45) | 8.30 (2.40) | 7.35 (2.20) | 6.70 (1.93) | 7.25 (2.40) | 7.75 (2.05) | <0.001 |
| Perceived stress * | 8.00 (4.00) | 8.00 (4.00) | 8.00 (5.00) | 10.0 (5.00) | 8.00 (4.00) | 9.00 (3.00) | <0.001 |
| Dietary Variables | |||||||
| % KCAL from fat /day * | 32.5 (9.74) | 33.0 (9.73) | 34.0 (9.25) | 33.0 (9.95) | 28.7 (9.71) | 29.9 (9.01) | <0.001 |
| Dietary fat, grams/day * | 58.6 (36.3) | 58.4 (34.3) | 65.4 (48.2) | 57.3 (32.5) | 52.4 (25.6) | 57.8 (29.9) | <0.001 |
| Physical Measurements | |||||||
|
Waist circumference
(cm) * |
78.0 (15.2) | 78.0 (15.2) | 84.0 (17.7) | 82.0 (13.0) | 74.3 (8.5) | 70.5 (9.3) | <0.001 |
|
Systolic blood pressure
(mmHg) * |
111.0 (17.0) | 110.0(16.0) | 118.0 (22.0) | 119.0(14.0) | 108.0 (19.0) | 109.0(17.0) | <0.001 |
|
Diastolic blood pressure
(mmHg) * |
73.0 (12.8) | 72.0 (12.0) | 74.0 (15.0) | 80.0 (3.0) | 71.0 (14.0) | 73.0 (11.0) | <0.001 |
| Biochemical Measurements | |||||||
| Blood drawn | <.0001 | ||||||
| In cycle day 2-5 | 81% | 83% | 78% | 82% | 74% | 86% | |
| Not in 2-5/unknown | 19% | 17% | 22% | 18% | 26% | 14% | |
| Triglyceride (mg/dL) * | 81.0 (43.0) | 82.0 (42.0) | 74.0 (37.0) | 92.0 (50.0) | 85.0 (44.0) | 83.0 (48.0) | <0.001 |
| HDL (mg/dL) * | 58.0 (16.0) | 58.0 (16.0) | 57.0 (16.0) | 52.5 (12.0) | 61.0 (17.0) | 62.5 (16.5) | <0.001 |
| Glucose (mg/dL) * | 89.0 (9.0) | 88.0 (9.0) | 90.0 (10.0) | 87.0 (11.0) | 91.0 (8.0) | 90.0 (8.0) | <0.001 |
| Estradiol (pg/mL) * | 59.7 (57.2) | 60.2 (54.6) | 61.7 (60.3) | 66.5 (79.9) | 53.6 (53.8) | 54.9 (53.5) | 0.009 |
| Testosterone (ng/dL) * | 39.5 (22.9) | 40.9 (23.6) | 39.0 (21.1) | 35.2 (25.0) | 38.9 (21.3) | 37.5 (22.5) | 0.005 |
| SHBG (nM) * | 44.3 (29.8) | 43.8 (29.6) | 44.9 (27.9) | 46.3 (27.4) | 41.9 (26.9) | 47.7 (38.6) | 0.04 |
| Free Androgen Index * | 3.13 (3.06) | 3.19 (3.12) | 3.03 (2.75) | 3.13 (3.49) | 3.33 (3.16) | 2.88 (2.92) | 0.06 |
|
Testosterone/Estradiol
Molar Ratio * |
6.08 (7.49) | 6.11 (7.28) | 5.65 (7.80) | 5.62 (9.17) | 6.62 (7.45) | 6.23 (7.52) | 0.25 |
*
- Median (IQRange)