Behavior of Lung Health Parameters among Smokers and Secondhand Smokers

Table 1

The frequency, mean, and standard deviation of TV, VC, FEV1, FEV1/VC with respect to sex. values are also depicted with 95% confidence interval.

	Sex	Frequency	Mean	Standard deviation	value	95% confidence interval of the difference
						Lower	Upper
TV	Female	47	0.401	0.191	0.008	−.167	−.0254
	Male	103	0.497	0.222
VC	Female	47	3.923	1.572	0.001	−1.928	−.769
	Male	103	5.272	1.834
FEV1	Female	47	2.850	1.950	0.391	−.980	.387
	Male	103	3.146	1.964
FEV1/VC	Female	47	0.750	0.393	0.038	.008	.271
	Male	103	0.611	0.334