Table 2.
Characteristics of WREN participants with serum organochlorine pesticide measurements, Group Health, 1996–2001 [n (%)].
| Characteristic | Cases (n = 248) | Controls (n = 538) |
|---|---|---|
| Age (years) | ||
| 17–24 | 19 (7.7) | 44 (8.2) |
| 25–34 | 52 (21.0) | 93 (17.3) |
| 35–44 | 120 (48.4) | 277 (51.5) |
| 45–49 | 57 (23.0) | 124 (23.1) |
| Race | ||
| White | 213 (85.9) | 457 (85.1) |
| Black | 8 (3.2) | 22 (4.1) |
| Asian/Pacific Islander | 20 (8.1) | 38 (7.1) |
| American Indian/Aleut/Eskimo | 2 (0.8) | 4 (0.7) |
| More than one race | 5 (2.0) | 16 (3.0) |
| Ethnicity | ||
| Hispanic | 16 (6.5) | 18 (3.4) |
| Non-Hispanic | 230 (93.5) | 518 (96.6) |
| Income | ||
| < $35,000 | 73 (30.5) | 146 (28.0) |
| $35,000–$69,999 | 105 (43.9) | 223 (42.7) |
| ≥ $70,000 | 61 (25.5) | 153 (29.3) |
| Education | ||
| < High school | 8 (3.2) | 17 (3.2) |
| High school graduate | 42 (16.9) | 96 (17.8) |
| Some college | 80 (32.3) | 202 (37.6) |
| College graduate | 79 (31.9) | 120 (22.3) |
| Postgraduate | 39 (15.7) | 103 (19.1) |
| Cigarette smoking | ||
| Never | 143 (57.7) | 325 (60.4) |
| Former | 56 (22.6) | 124 (23.1) |
| Current | 49 (19.8) | 89 (16.5) |
| Alcohol use | ||
| Never | 68 (27.5) | 186 (34.6) |
| Former | 45 (18.2) | 113 (21.0) |
| Current | 134 (54.3) | 239 (44.4) |
| BMI (kg/m2) | ||
| < 18.5 | 8 (3.2) | 11 (2.1) |
| 18.5–< 25.0 | 126 (50.8) | 278 (52.1) |
| 25.0–< 30.0 | 60 (24.2) | 140 (26.2) |
| ≥ 30.0 | 54 (21.8) | 105 (19.7) |
| Parity | ||
| Nulliparous | 121 (48.8) | 157 (29.2) |
| Parous | 127 (51.2) | 380 (70.8) |
| Lifetime lactation history (weeks) | ||
| Did not breastfeed, nulliparous | 121 (48.8) | 157 (29.2) |
| Did not breastfeed, parous | 27 (10.9) | 71 (13.2) |
| 1–24 weeks | 42 (16.9) | 89 (16.6) |
| 25–52 weeks | 28 (11.3) | 77 (14.3) |
| > 52 weeks | 30 (12.1) | 143 (26.6) |
| Total lipids (mg/dL) [median (IQR)] | 679.7 (593.4, 816.1) | 661.4 (572.6, 777.1) |
| IQR, interquartile range. | ||