Characteristics of cases with PD and population-based controls, Tehran, 2021–2022
| Variables | Cases* (508) N (%) | Controls* (1015) N (%) | |
| Sex | Male | 330 (64.96) | 498 (49.06) |
| Female | 178 (35.04) | 517 (50.94) | |
| Age (years) | Median (IQR) | 62.00 (13) | 60.00 (13) |
| Mean | 62.49 (8.78) | 62.13 (8.87) | |
| Age categories (years) | 50–60 | 216 (42.52) | 525 (51.72) |
| 60–70 | 194 (38.19) | 313 (30.84) | |
| >70 | 98 (19.29) | 177 (17.44) | |
| Marital status | Single | 9 (1.78) | 14 (1.40) |
| Married | 421 (83.04) | 786 (78.60) | |
| No spouse due to death or divorce | 77 (15.18) | 200 (20.00) | |
| Schooling years | Median (IQR) | 11.00 (9.00) | 10.00 (7.00) |
| Ethnicity | Fars | 259 (51.39) | 863 (76.15) |
| Turk | 163 (32.34) | 139 (13.87) | |
| Kurd | 13 (2.58) | 15 (1.50) | |
| Lor | 19 (3.77) | 26 (2.59) | |
| Mazani and Gilak | 32 (6.35) | 37 (3.70) | |
| Other (Baloch, Torkaman, Arab) | 18 (3.57) | 22 (2.30) |
*N (%), except where otherwise indicated, in the case of missing data, the sum of categories was less than 1015 and 508 in controls and cases, respectively.
PD, Parkinson’s disease.