Table 1.
Demographic characteristics of the cohort subjects and the Hong Kong general population
| Patient participants | Baseline sample (N = 10179) | Follow-up cohort (N = 4358) | HK 2011 Census (age ≥18 years) |
|---|---|---|---|
| Gender (n, %) | |||
| Male | 4142 (40.7%) | 1803 (41.4%) | 46.7% |
| Female | 5763 (56.6%) | 2529 (58.0%) | 53.3% |
| Not indicated | 274 (2.7%) | 26 (0.6%) | – |
| Age in year (mean ± SD) | 49.0±18.1 | 49.6±17.1 | 46.58±17.4 |
| Age group (n, %) | |||
| 18–24 years | 689 (6.8%) | 269 (6.2%) | 10.5% |
| 25–34 years | 1874 (18.4%) | 746 (17.1%) | 18.1% |
| 35–44 years | 1719 (16.9%) | 741 (17.0%) | 18.9% |
| 45–54 years | 1777 (17.5%) | 817 (18.7%) | 21.5% |
| 55–64 years | 1602 (15.7%) | 834 (19.1%) | 15.4% |
| 65+ years | 2071 (20.3%) | 888 (20.4%) | 15.7% |
| Not indicated | 447 (4.4%) | 63 (1.4%) | – |
| Ethnicity (n, %) | |||
| Chinese | 9744 (95.7%) | 4216 (96.7%) | 93.6% |
| Non-Chinese | 394 (3.9%) | 140 (3.2%) | 6.4% |
| Not indicated | 41 (0.4%) | 2 (0.1%) | – |
| Household monthly income (n, %) | |||
| ≤HK$5000 | 1243 (12.2%) | 560 (12.8%) | 11.1% |
| HK$5001–HK$10000 | 761 (7.5%) | 356 (8.2%) | 12.7% |
| HK$10001–HK$20000 | 1815 (17.8%) | 826 (19.0%) | 23.8% |
| HK$20001–HK$30000 | 1533 (15.1%) | 705 (16.2%) | 17.6% |
| HK$30001–HK$40000 | 1073 (10.5%) | 515 (11.8%) | 11.4% |
| >HK$40000 | 2159 (21.2%) | 994 (22.8%) | 23.5% |
| Not indicated | 1595 (15.7%) | 402 (9.2%) | – |
| Marital status (n, %) | |||
| Single | 2699 (26.5%) | 1080 (24.8%) | 28.8% |
| Married | 6059 (59.5%) | 2771 (63.6%) | 60.1% |
| Widowed | 773 (7.6%) | 330 (7.6%) | 6.5% |
| Separated/divorced | 326 (3.2%) | 163 (3.7%) | 4.6% |
| Not indicated | 322 (3.2%) | 14 (0.3%) | – |
| Education level (n, %) | |||
| No formal schooling | 775 (7.6%) | 274 (6.3%) | 6.4% |
| Primary | 1629 (16.0%) | 800 (18.4%) | 23.1% |
| Secondary | 4127 (40.5%) | 1864 (42.8%) | 46.8% |
| Tertiary | 3325 (32.7%) | 1404 (32.2%) | 23.8% |
| Not indicated | 323 (3.2%) | 16 (0.4%) | – |
| District of residence (n, %) | |||
| Hong Kong Island | 4085 (40.1%) | 1873 (43.0%) | 18.0% |
| Kowloon | 2243 (22.0%) | 1034 (23.7%) | 29.8% |
| New Territories | 3473 (34.1%) | 1431 (32.8%) | 52.2% |
| Not indicated | 378 (3.7%) | 20 (0.5%) | – |
Distributions of household monthly income and education level of the HK 2011 Census results reported above may not be exact due to the use of different classification groupings.