Table 6. Secondary cases among smear-positive PTB patients according to chest radiograph category.
| Secondary Cases by Type* | Total | CXR Category | p-value* | |
|---|---|---|---|---|
| Typical (n = 69) | Atypical (n = 28) | |||
| Type 1 | 17 | 17 | 0 | 0.002 |
| Type 2 | 8 | 7 | 1 | 0.420 |
| Type3 | 17 | 16 | 1 | 0.020 |
| All Types | 42 | 40 | 2 | 0.001 |
Abbreviations: PTB pulmonary TB; CXR chest radiograph; TST tuberculin skin test interval
*Median (Range) days until diagnosis of Type 1, 2, and 3 cases were 52 days (4–507 days), 28 days (4–91 days), and 433 days (50–730 days), respectively.