| Characteristic | Subjects n (%) |
| Gender |
|
| Male | 143 (57.2) |
| Female | 107 (42.8) |
| Age (moths) |
|
| <12 | 90 (36.0) |
| 12 - 23 | 60 (24.0) |
| 24 - 35 | 40 (16.0) |
| 36 - 47 | 30 (12.0) |
| 48 - 59 | 30 (12.0) |
| Mean ± SD | 19.4 ± 14.8 |
| Residence |
|
| Urban | 142 (56.8) |
| Rural | 108 (43.2) |
| Type of accommodation |
|
| Tenement | 91 (36.4) |
| Flat | 92 (36.8) |
| Bungalow | 49 (19.6) |
| Semi-detached | 18 (7.2) |
| Social class |
|
| High | 23 (9.2) |
| Middle | 104 (41.6) |
| Low | 123 (49.2) |