Table 3.

FVC, FEV₁, and FEV₁% of study participants in subsequent statistical analyses

	COPDa				Controlb
	Number of cases (%)	FVC	FEV1	FEV1%	Number of cases (%)	FVC	FEV1	FEV1%
Sex
Male	140 (50.5)	2.23±0.81	1.24±0.47	0.56±0.09	141 (45.9)	3.62±0.74	3.18±0.81	0.88±0.02
Female	137 (49.5)	2.42±0.66	1.52±0.45	0.63±0.07	166 (54.1)	3.46±0.69	2.84±0.69	0.82±0.05
Age
Nonelderly group	78 (28.2)	2.49±0.84	1.56±0.46	0.63±0.08	208 (67.8)	3.74±0.81	3.41±0.85	0.91±0.04
Elderly group	199 (71.8)	2.23±0.87	1.31±0.44	0.58±0.09	99 (32.2)	3.55±0.87	2.88±0.87	0.81±0.03
BMI
Normal	158 (57.1)	2.54±0.79	2.01±0.48	0.64±0.06	202 (65.8)	3.97±0.72	3.53±0.79	0.89±0.04
Underweight	90 (32.5)	2.15±0.76	1.23±0.49	0.57±0.08	44 (14.3)	3.26±0.65	2.54±0.83	0.78±0.05
Overweight	29 (10.5)	2.31±0.82	1.41±0.47	0.61±0.07	61 (19.9)	3.41±0.77	2.76±0.77	0.81±0.06

Notes:

^aN=277.

^bN=307. Data are presented as mean ± standard deviation.

Abbreviations: COPD, chronic obstructive pulmonary disease; FVC, forced vital capacity; FEV₁, forced expiratory volume in 1 second; BMI, body mass index.