Table II.

Impact of Body Mass Index on Pulmonary Function Test by Performing Spirometry.

Pulmonary Function Parameters	Body Mass Index										p-value
	Underweight (n=34)		Normal weight (n=30)		Overweight at risk (n=17)		Obese 1 (n=55)		Obese 2 (n=44)
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
FVC (L)	2.27	0.48	2.37	0.65	2.47	0.68	2.28	0.58	2.49	0.75	0.69
FEV1 (L)	2.38	0.74	3.48	0.68	3.31	0.97	1.98	0.52	2.07	0.55	<0.01*
FEV1 / FVC (%)	93.1	4.04	86.6	7.70	90.3	7.48	86.4	10.4	87.1	8.25	<0.01*
Average VT (L)	1.22	0.42	0.84	0.22	0.90	0.29	1.01	0.60	1.62	0.50	<0.01*
IRV	1.04	0.21	1.20	0.49	1.18	0.42	1.23	0.41	1.64	0.57	<0.01*
ERV	0.36	0.22	0.48	0.40	0.33	0.16	0.29	0.16	0.37	0.24	0.15
IC	2.26	0.45	2.05	0.55	2.08	0.60	2.25	0.87	3.26	0.75	<0.01*
VC	2.63	0.44	2.54	0.83	2.42	0.65	2.54	0.88	3.64	0.75	<0.01*
TLC	2.98	0.49	3.17	1.03	3.03	0.82	3.18	1.10	4.55	0.94	<0.01*
FRC	0.65	0.25	1.12	0.58	0.94	0.27	0.92	0.29	1.28	0.33	<0.01*

^*p<0.05 was considered significant using Kruskal Wallis test.