Table 3 Clinical characteristics of index case by clinical group
|  | PTST- | TSTC | TST+ | All | χ 2across all 3 groups | χ 2for PTST- + TSTC vs. TST+ | χ 2for PTST- vs. TSTC and TST+ |
|---|---|---|---|---|---|---|---|
Presence of Cavitary Disease | |||||||
No | 74 (53.2%) | 75 (45.5%) | 306 (34.7%) | 455 (38.4%) | Â | Â | Â |
Yes | 65 (46.8%) | 90 (54.5%) | 576 (65.3%) | 731 (61.6%) | Â | Â | Â |
All | 139 | 165 | 882 | 1186 | <0.005* | <0.005* | <0.005* |
Baseline Extent of disease on chest x-ray | |||||||
Normal | 18 (12.9%) | 9 (5.5%) | 40 (4.5%) | 67 (5.6%) | Â | Â | Â |
Minimal | 22 (15.8%) | 22 (13.3%) | 81 (9.2%) | 125 (10.5%) | Â | Â | Â |
Moderate | 58 (41.7%) | 76 (46.1%) | 305 (34.6%) | 439 (37.0%) | Â | Â | Â |
Advanced | 41 (29.5%) | 58 (35.2%) | 456 (51.7%) | 555 (46.8%) | Â | Â | Â |
All | 139 | 165 | 882 | 1186 | <0.005* | <0.005* | <0.005* |
High Index case Smear | |||||||
None | 4 (2.8%) | 3 (1.8%) | 14 (1.6%) | 21 (1.7%) | Â | Â | Â |
Scanty | 5 (3.5%) | 1 (0.6%) | 11 (1.2%) | 17 (1.4%) | Â | Â | Â |
1+ | 13 (9.2%) | 4 (2.4%) | 21 (2.3%) | 38 (3.1%) | Â | Â | Â |
2+ | 31 (21.8%) | 39 (23.2%) | 89 (9.9%) | 159 (13.1%) | Â | Â | Â |
3+ | 89 (62.7%) | 121 (72%) | 765 (85%) | 975 (80.6%) | Â | Â | Â |
Total | 142 | 168 | 900 | 1210 | <0.005* | <0.005* | <0.005* |
Duration of Cough prior to treatment (days) | |||||||
Mean (SD) | 123.48 (155.876) | 118.75 (124.032) | 119.49 (119.597) | Â | 0.150 | 0.057 | 0.998 |
Mycobacterial lineage | |||||||
Lineage 4 Uganda | 57 (46.3%) | 71 (47.7%) | 415 (54.0%) | 543 (52.2%) | Â | Â | Â |
Lineage 4 non_Uganda | 49 (39.8%) | 60 (40.3%) | 280 (36.4%) | 389 (37.4%) | Â | Â | Â |
Lineage 3 | 17 (13.8%) | 18 (12.1%) | 74 (9.6%) | 109 (10.5%) | Â | Â | Â |
Total | 123 | 149 | 769 | 1041 | 0.308 | 0.101 | 0.269 |