Table 1 Demographic characteristics of the subjects.
Age | Gender | Total | ||||
|---|---|---|---|---|---|---|
Male | Female | |||||
No. | % | No. | % | No. | % | |
<12 months | 134 | 40.7 | 114 | 42.1 | 248 | 41.3 |
12 - <24 months | 46 | 7.7 | 42 | 7.0 | 88 | 14.7 |
24 - <36 months | 21 | 3.5 | 19 | 3.2 | 40 | 6.7 |
36 - <48 months | 25 | 4.2 | 19 | 3.2 | 44 | 7.3 |
48 - <60 months | 22 | 3.7 | 16 | 2.7 | 38 | 6.3 |
60 - <180 months | 81 | 24.6 | 61 | 22.5 | 142 | 23.7 |
Social class | ||||||
I | 22 | 6.7 | 19 | 7.0 | 41 | 6.8 |
II | 58 | 17.6 | 41 | 15.1 | 99 | 16.5 |
III | 109 | 33.4 | 85 | 31.4 | 194 | 32.3 |
IV | 121 | 37.1 | 104 | 38.4 | 225 | 37.5 |
V | 10 | 3.0 | 17 | 6.3 | 27 | 4.5 |
Unknown | 9 | 1.8 | 5 | 1.8 | 14 | 2.3 |
Total | 329 | 54.8 | 271 | 45.2 | 600 | 100 |