Characteristics of participants compared with Tehran population
| Characteristics | Participants | Tehran population* | |
|---|---|---|---|
| No (%) | No (%) | ||
| *The 1996 national census. | |||
| Age groups (years) | |||
| 1–9 | 557 (12.20) | 1103539 (16.60) | |
| 10–19 | 1159 (25.39) | 1629238 (24.51) | |
| 20–29 | 744 (16.30) | 1222077 (18.39) | |
| 30–39 | 671 (14.70) | 1048618 (15.78) | |
| 40–49 | 631 (13.82) | 717701 (10.80) | |
| 50–59 | 417 (9.14) | 431675 (6.49) | |
| 60–69 | 223 (4.88) | 304455 (4.58) | |
| 70+ | 163 (3.57) | 189772 (2.85) | |
| Sex | |||
| Male | 1909 (41.82) | 3410971 (51.32) | |
| Female | 2656 (58.18) | 3236104 (48.68) | |
| All | 4565 | 6647075 | |