Adjusted OR (95% CI)

Crude OR (95% CI)

Normal contacts (%)

TB positive contacts

Risk factors

1

0.88 (0.74, 0.94)

1 (Reference)

0.46 (0.24, 0.88)

285

329

27

16

Education

Illiterate

Some education

1

1.94 (1.00, 3.4)

1

2.02 (1.07, 3.79)

440

174

25

18

Duration of contact

<4 months

>4 months