Table 1.

Association of pulmonary tuberculosis with smoking

Variables	Cases 111 (100%)	Controls 333 (100%)	Matched OR (95% CI)	Adjusted* OR (95% CI)	P value
Pack year#
≤5	15 (13.5)	27 (8.1)	2.4 (1.1, 5.0)	2.9 (1.2, 6.8)	0.02
≥5	22 (19.8)	19 (5.7)	4.6 (2.3, 9.2)	4.6 (2.1, 10.1)	0.0001
No. of bidis or cigarettes per day#
≤10	19 (17.1)	24 (7.2)	3.4 (1.7, 7.0)	4.0 (1.7, 9.1)	0.001
≥10	18 (16.2)	22 (6.6)	3.4 (1.7, 6.8)	3.6 (1.7, 7.9)	0.001
Duration of smoking (years)#
≤10	15 (13.5)	30 (9.0)	2.0 (1.0, 4.2)	2.5 (1.1, 5.7)	0.03
≥10	22 (19.8)	16 (4.8)	5.6 (2.7, 11.8)	5.7 (2.4, 13.1)	<0.0001

^#Reference category is ‘nonsmoker.’;

^*Adjusted for BMI, social class and house type