Table 1. Characteristics of patients recruited at public and private clinics.
| Public clinics, n (%) | Private clinics, n (%) | Total, n (%) | Statistical test, p-value | ||
| Mean age | 37.3 (21.6) | 31.4 (19.8) | 36.0 (21.4) | t =7.813, <0.001 | |
| (yrs) (SD) | |||||
| Ethnicity | Malay | 2388 (67.3) | 464 (45.5) | 2852 (62.4) | χ2=371.77, p<0.001 |
| Chinese | 511 (14.4) | 378 (37.1) | 889 (19.5) | ||
| Indian | 534 (15.0) | 78 (7.6) | 612 (13.4) | ||
| Others | 117 (3.3) | 100 (9.8) | 217 (4.7) | ||
| Total | 3551 (100) | 1020 (100) | 4571 (100) | ||
| Sex | Male | 1585 (43.9) | 540 (52.7) | 2125 (45.9) | χ2=25.11, p<0.001 |
| Female | 2026 (56.1) | 484(47.3) | 2510 (54.1) | ||
| Total | 3611 (100.0) | 1024 (100.0) | 4635 (100.0) |