Table 1.
Baseline characteristics of participants in analytic sample by ethnicity
| Characteristic | % (n) or median (25–75th percentile)
|
P for ethnic differencesa | |||||
|---|---|---|---|---|---|---|---|
| All ethnicities (n = 2886) | African-American (n = 774) | Caucasian (n = 1372) | Chinese (n = 236) | Hispanic (n = 248) | Japanese (n = 256) | ||
| Menopause status | 0.0003 | ||||||
| Pre | 54.3 (1566) | 49.9 (386) | 53.2 (730) | 62.3 (147) | 57.3 (142) | 62.9 (161) | |
| Early peri | 45.7 (1320) | 50.1 (388) | 46.8 (642) | 37.7 (89) | 42.7 (106) | 37.1 (95) | |
| Age at blood draw (yr) | 46.3 (44.2–48.4) | 46.4 (44.2–48.4) | 46.1 (44.1–48.4) | 46.6 (44.4–48.2) | 46.2 (44.2–48.2) | 46.6 (44.4–48.7) | 0.5512 |
| Active smoking status | <0.0001 | ||||||
| Never | 57.3 (1653) | 53.1 (411) | 50.3 (690) | 94.1 (222) | 66.9 (166) | 64.1 (164) | |
| Past | 25.8 (744) | 22.4 (174) | 33.3 (457) | 4.7 (11) | 17.3 (43) | 23.1 (59) | |
| Current | 16.9 (489) | 24.4 (189) | 16.4 (225) | 1.3 (3) | 15.7 (39) | 12.9 (33) | |
| Passive smoking status | <0.0001 | ||||||
| None | 45.6 (1317) | 35.5 (275) | 39.7 (544) | 77.1 (182) | 63.3 (157) | 62.1 (159) | |
| 1–4 h/wk | 26.5 (765) | 25.8 (200) | 32.1 (440) | 16.5 (39) | 11.7 (29) | 22.3 (57) | |
| ≥5 h/wk | 27.9 (804) | 38.6 (299) | 28.3 (388) | 6.4 (15) | 25.0 (62) | 15.6 (40) | |
| BMI (kg/m2) | 26.5 (22.8–32.1) | 30.2 (26.0–36.1) | 26.1 (22.8–31.2) | 22.4 (20.8–24.8) | 28.3 (25.3–32.2) | 22.1 (20.4–24.5) | <0.0001 |
| DHEAS (μg/ml)b | 114.2 (75.8–169.3) | 92.1 (61.9–135.7) | 121.9 (79.4–176.7) | 154.8 (111.1–216.2) | 107.0 (63.7–146.6) | 131.6 (87.0–181.4) | <0.0001 |
| Estradiol (pg/ml)b | 55.3 (32.8–88.8) | 54.8 (32.8–90.2) | 56.9 (34.5–89.4) | 48.5 (27.7–81.3) | 61.9 (28.2–98.0) | 50.3 (30.1–81.7) | 0.0043 |
| T (ng/dl)b | 41.4 (29.7–55.8) | 41.1 (30.6–57.1) | 42.7 (30.7–57.1) | 40.3 (27.9–51.1) | 37.5 (26.8–51.8) | 38.1 (28.3–50.6) | <0.0001 |
| SHBG (nm)b | 41.3 (28.1–41.3) | 42.3 (30.5–58.2) | 41.1 (27.6–57.5) | 39.3 (26.5–54.9) | 40.1 (27.8–53.8) | 43.4 (28.0–65.1) | 0.1143 |
a
χ2 test for categorical variables, Kruskal-Wallis test for continuous variables.
b
Missing for one participant.