Table 2. Comparison of respiratory functions according to groups.

Measurement	Mean±SD	Median	Min-Max	Test	p	Difference
FVC				9.718	0.008*	1-3. 2-3
Group 1	102±11.5	98	88-117
Group 2	95.4±10.0	92	80-119
Group 3	84.2±13.3	82	65-119
FEV1				17.157	<0.001*	1-3. 2-3
Group 1	107.3±12.9	102	95-128
Group 2	102.2±9.3	102.5	86-122
Group 3	83±9.6	85	70-102
FEV1/FVC				1.928	0.381	-
Group 1	104±4.9	102.5	98-112
Group 2	105.1±5.1	104	99-118
Group 3	95.6±15.2	102	65-112
SD: Standard deviation; FVC: Forced vital capacity; FEV1: Forced expiratory volume in 1 second. Kruskal-Wallis test; * p<0.05.