Table 2. Incidence of tuberculosis among 1,371 indigenous contacts according to tuberculin skin test (TST) results.

Tuberculin skin test results	Diagnosis of tuberculosis (n  = 23) n/N(%)	RR (95% CI)
Not performed	1/17 (5.90)	–
0–4 mm	5/739 (0.68)	Reference
5–9 mm	3/92 (3.26)	4.82 (1.17–19.83)
≥10 mm	14/523 (2.68)	3.96 (1.43–10.92)

Abbreviations: RR, relative risk.