Table 3.
Diagnostic tests and drug resistances in older and younger tuberculosis patients
| Characteristics | Older | Younger | p-value |
|---|---|---|---|
| Positive AFB smear |
67/190 (35) |
66/247 (27) |
0.060 |
| Positive culture for M.TB |
155/191 (81) |
169/248 (68) |
0.002 |
| Positive TB PCR |
146/190 (77) |
168/247 (68) |
0.053 |
| Positive IGRA |
56/63 (89) |
87/97 (90) |
1.000 |
| Positive tuberculin skin test |
86/92 (93) |
133/143 (93) |
1.000 |
| Confirmed by bronchoscopy in pulmonary TB* |
64/173 (37) |
53/222 (24) |
0.005 |
| Drug resistances |
|
|
|
| Resistance to INH |
10/137 (7) |
15/160 (9) |
0.665 |
| Multi-drug resistance | 1/137 (1) | 6/160 (4) | 0.185 |
The data are presented as n (%).
*: included both of the pulmonary tuberculosis, and pulmonary and extrapulmonary tuberculosis.
IGRA = interferon gamma releasing assay, INH = isoniazid, MDR = multi-drug resistant, M.TB = Mycobacterium tuberculosis, RFP = rifampin.