Table 2. Epidemiologic Measures of TB exposure burden.

	Totaln  = 122	Stable Convertersn = 97 (79.5%)	Revertersn = 25 (20.5%)	P-value
AFB smear of Index
1+	5	4 (4%)	1 (4%)	0.52
2+	25	18 (19%)	7 (28%)
3+	92	75 (17%)	17 (68%)
Cavitary lesions on Index CXR
Yes	66	53 (55%)	13 (52%)	0.81
No	55	43 (44%)	12 (48%)
Unknown	1	1 (1%)	0
# Co-prevalent TB cases in household
0	105	84 (87%)	21 (84%)	0.96
1	9	6 (6%)	3 (12%)
2	8	7 (7%)	1 (4%)
# Incident TB cases in household
0	114	92 (95%)	22 (88%)	0.10
1	7	5 (5%)	2 (8%)
2	1	0	1 (4%)