Table 3.
QFT conversion rates at any test point (using manufacturer’s conversion definition) in Indian trainees stratified by participant characteristics.
| Characteristic | Conversions (n/N)* |
|---|---|
| Sex | |
| Females | 28/250 (11.2%) |
| Males | 35/191 (18.3%) |
| Student type | |
| Medical student | 54/307 (17.6%) |
| Nursing student | 9/134 (6.7%) |
| Completed 6 month LTBI treatment | |
| No | 60/437 (13.7%) |
| Yes | 3/4 (75%) |
| Any TB exposures in the community prior to study enrollment | |
| No | 60/410 (14.6%) |
| Yes | 3/31 (9.7%) |
| Any medical postings prior to study enrollment | |
| No | 39/215 (18.1%) |
| Yes | 24/226 (10.6%) |
| Any TB exposures in hospital prior to enrollment | |
| No | 48/296 (16.2%) |
| Yes | 15/145 (10.3%) |
*
For this analysis, each period (i.e., QFT1 to QFT2 or QFT2 to QFT3) was treated as a separate and independent event. Therefore, denominators represent number of eligible participants at each time point to convert. In order to be eligible for conversion, participants must have had a negative QFT on the previous test, therefore denominators are the number with negative QFT at the start of the interval.