Table 6.
Risk factors for active TB in close contacts of the index case.
| Terms | Latent TB | p-valueb | Active TB | p-value | ||
|---|---|---|---|---|---|---|
| − | + | − | + | |||
| Age | ||||||
| 20–29 | 16 | 6 | 0.0494 | 17 | 5 | 0.1550b |
| 30–38 | 3 | 7 | 10 | 0 | ||
| BCG scar | ||||||
| Yes | 13 | 12 | 0.4264 | 22 | 3 | 0.2964b |
| No | 5 | 2 | 5 | 2 | ||
| Residence area | ||||||
| Urban | 17 | 10 | 1.0000 | 15 | 2 | 0.6454b |
| Rural | 15 | 8 | 12 | 3 | ||
| Exposure levela | ||||||
| 1 | 6 | 1 | 0.1037 | 2 | 5 | 0.0030c |
| 2 | 12 | 13 | 25 | 0 | RR = 13.5 (95% CI 1.21–141.77)c | |
a
Exposure level 1 represents a close contact living in the same room as the ATB case or a good friend of the index case, exposure level 2 represents close contacts who attended classes in the same classroom as the index case.
b
These data were analyzed with the Fisher’s exact test using GraphPad Prism 9.5.1 Version (San Diego, CA, United States).
c
The RR of the exposure level was estimated by Exact Poisson regression using Stata® (Stata Corp., College Station, Texas, United States).