Table 2.
Baseline characteristics* by quintile of total serum PCB concentration (ng/g serum) among controls matched to confirmed PD cases.
| Q1 | Q2 | Q3 | Q4 | Q5 | |
|---|---|---|---|---|---|
| Total PCB, mean (ng/g) | 3.33 | 4.77 | 6.16 | 7.87 | 13.93 |
| Age, mean (sd) | 47.8 (9.3) | 51.0 (8.3) | 51.1 (11.6) | 48.8 (9.9) | 48.4 (9.3) |
| Male, % | 5 (16.1) | 17 (47.2) | 20 (51.3) | 23 (63.9) | 27 (61.4) |
| BMI, mean (sd) | 26.7 (4.3) | 26.0 (3.3) | 26.4 (3.1) | 26.2 (4.0) | 25.1 (3.6) |
| SBP, mean (sd) | 141 (15) | 141 (19) | 148 (21) | 149 (26) | 144 (24) |
| DBP, mean (sd) | 85 (10) | 83 (11) | 82 (11) | 84 (10) | 81 (12) |
| Serum cholesterol, mean (sd) | 235 (48) | 258 (55) | 288 (54) | 277 (49) | 288 (53) |
| Serum triglycerides, mean (sd) | 111 (39) | 118 (36) | 148 (58) | 137 (69) | 156 (110) |
| Never cigarette smoker, % | 78.0 | 67.5 | 57.1 | 44.4 | 46.9 |
| Normotensive, % | 37.7 | 43.5 | 33.5 | 38.7 | 46.1 |
| Occupation | |||||
| Agriculture | 37.9 | 28.7 | 8.1 | 13.6 | 27.5 |
| Industry | 19.1 | 29.7 | 44.7 | 41.6 | 35.3 |
| Housewife | 3.8 | 12.2 | 14.8 | 1.9 | 2.2 |
| Other | 39.2 | 29.4 | 26.3 | 39.1 | 35.0 |
| Region, % | |||||
| Southwest | 10.4 | 12.5 | 9.0 | 12.4 | 4.6 |
| Southern | 7.8 | 14.2 | 28.5 | 9.4 | 14.7 |
| Central | 20.6 | 20.5 | 12.7 | 3.9 | 7.5 |
| Western | 12.7 | 7.2 | 9.6 | 7.7 | 9.7 |
| Eastern | 41.1 | 37.0 | 31.0 | 25.2 | 28.2 |
| Northern | 7.4 | 8.6 | 9.3 | 41.4 | 35.2 |
*
All variables, except age and sex, are age and sex adjusted by direct standardization to all matched controls.