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The association of exposure index case in the classroom and dorm room with new active TB.
| Type of contacts | New active TB |
Crude RR (95% CI) | P-value | |
|---|---|---|---|---|
| No | Yes | |||
| Contacts of control | 6128 | 2 | 1 | |
| Contacts of index case | ||||
| Classmate and dorm roommate | 1117 | 12 | 32.58 (12.08, 87.87) | <0.001 |
| Classmate living in different dorm room | 4497 | 13 | 8.83 (2.34, 33.37) | 0.001 |
| Ambulatory classmate | 606 | 1 | 5.05 (0.01, 4771.59) | 0.141 |
Abbreviation: TB: tuberculosis; RR, relative risk.
