Table 2.

Findings of pulmonary function test amongst smokers in miners as well as control group as compared to nonsmokers

PFT	Miners (n = 150)			Control (n = 83)
	Smoker	Nonsmoker	P value	Smoker	Nonsmoker	P value
Normal	31	98		20	49
Obstructive impairment	2	3	NS	1	1	NS
Restrictive impairment	8	7	<0.05	4	4	<0.05
Combined impairment	1	0	<0.5	0	1	NS
Not performed	0	0		1	2

NS: Nonsignificant