Table 1.
Population characteristics of cohort participants and potential cases of Parkinson’s disease
| All participants | Self-reported cases (n=301) | |||||||
|---|---|---|---|---|---|---|---|---|
| Clinically examined | Screener only | Not contacted |
||||||
| All | PD confirmed | No PD | All | PD confirmed | No PD | |||
| Number of participants* | 71600 | 133 | 76 | 57 | 36 | 19 | 17 | 132 |
| Baseline age, years (mean±SD) | 52.0±9.0 | 59.8±7.1 | 59.4±7.3 | 60.4±6.9 | 63.0±5.7 | 62.8±6.6 | 63.3±4.8 | 63.6±6.0 |
| Education level, % | ||||||||
| Primary/under | 21.1 | 36.8 | 38.2 | 35.1 | 50.0 | 31.6 | 70.6 | 49.2 |
| Middle school | 37.4 | 29.3 | 25.0 | 35.1 | 19.4 | 21.1 | 17.7 | 20.5 |
| High school/above | 41.6 | 33.8 | 36.8 | 29.8 | 30.6 | 47.4 | 11.8 | 30.3 |
| Married, % | 90.0 | 87.2 | 86.8 | 87.7 | 91.7 | 89.5 | 94.1 | 84.9 |
| Ever cigarette smoking, % | 2.7 | 3.0 | 1.3 | 5.3 | 0 | 0 | 0 | 7.6 |
| Husband ever smoking* | 61.8 (64067) | 52.6 (116) | 50.0 (66) | 56.0 (50) | 54.6 (33) | 52.9 (17) | 56.3 (16) | 53.6 (112) |
| Current smoking | 52.8 (64067) | 37.1 (116) | 30.3 (66) | 46.0 (50) | 30.3 (33) | 35.3 (17) | 25.0 (16) | 33.0 (112) |
| Ever alcohol drinking, (%) | 2.3 | 3.8 | 2.6 | 5.3 | 2.8 | 0 | 5.9 | 3.0 |
| Ever tea drinking, (%) | 29.9 | 21.8 | 21.1 | 22.8 | 16.7 | 15.8 | 17.7 | 11.4 |
| Ever contraceptive use, (%) | 20.6 | 21.1 | 19.7 | 22.8 | 25.0 | 31.6 | 17.7 | 17.4 |
| Ever use of HRT, (%) | 4.3 (35030) | 2.7 (111) | 3.2 (62) | 2.0 (49) | 8.6 (35) | 11.1 (18) | 5.9 (17) | 2.4 (127) |
| Blood collected, (%) | 76.3 | 80.5 | 79.0 | 82.5 | 55.6 | 57.9 | 52.9 | 74.2 |
| Urine collected, (%) | 88.3 | 93.2 | 92.1 | 94.7 | 88.9 | 84.2 | 94.1 | 86.4 |
*
Denominators are provided when there are missing observations. For education, only 12 had missing in the entire cohort, none among self-reported PD cases. 12 missing on education, 616 on marriage, 7533 on husband smoking, 30 on HRT use. HRT was among postmenopausal women only.