Table 1 Demographic characteristics of the secondary school sample.
|  | First time TST participantsΦ | Repeat TST participantsΦΦ | ||||
|---|---|---|---|---|---|---|
| Â | HIV-uninfected | HIV-infected | Total | HIV-uninfected | HIV-infected | Total |
| Â | n = 617 | n = 34 | n = 654 | n = 154 | n = 4 | n = 159 |
| Â | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) |
Age: mean (range) | 17.5 (13-22) | 18.4 (15-22) | 17.5 (13-22) | 15.4 (13-19) | 15.3 (14-17) | 15.4 (13-19) |
   13-16 yrs | 176 (29) | 5 (15) | 183 (28) | 133 (86) | 3 (75) | 136 (86) |
   17 yrs | 148 (24) | 4 (12) | 152 (23) | 13 (8) | 1 (25) | 15 (9) |
   18 yrs | 112 (18) | 9 (26) | 121 (19) | 6 (4) | 0 (0) | 6 (4) |
   19-22 yrs | 181 (29) | 16 (47) | 202 (30) | 2 (1) | 0 (0) | 2 (1) |
Gender: Male | 255 (41) | 9 (34) | 266 (41) | 81 (53) | 2 (50) | 84 (53) |
BCG Scar present | 80 (13) | 6 (18) | 86* (13) | 32 (21) | 0 (0) | 32 (20) |
TST positive | 331 (54) | 11 (32) | 345 (53) | 90 (58) | 1 (25) | 91 (57) |