TABLE 3.
The positivity of AFB smear, Xpert, and Mtb culture by presence of cavity, new and previous treatment, gender, and sputum type, compared to composite results of the three methods.
| AFB smear | Xpert MTB/RIF | Mtb culture | ||||
| Cavity | 89 (153/172) | p = 0.002 | 99.4 (171/172) | p = 0.06 | 94.8 (163/172) | p = 0.002 |
| No cavity | 76.1 (134/176) | 96 (169/176) | 84.7 (149/176) | |||
| Newly diagnosed TB | 78.8 (152/193) | p = 0.04 | 97.4 (188/193) | 0.73 | 89.6 (173/193) | p = 0.99 |
| Previously treated TB | 87.1 (135/155) | 98.1 (152/155) | 89.7 (139/155) | |||
| Male | 81.2 (177/218) | p = 0.41 | 98.6 (215/218) | p = 0.13 | 87.2 (190/218) | p = 0.04 |
| Female | 84.6 (110/130) | 96.2 (125/130) | 93.9 (122/130) | |||
| Morning sputum | 85.4 (204/239) | p = 0.04 | 98.7 (236/239) | p = 0.33 | 90.8 (217/239) | p = 0.07 |
| Mixed sputum | 89.8 (44/49) | 98 (48/49) | 81.6 (40/49) | |||
| Spot sputum | 74.2 (49/66) | 98.5 (65/66) | 83.3 (55/66) | |||