Table 1.

The Demographic Characteristics of Study Groups and the Control Group

Characteristics	Control	COPD Group		P-value
	(n=60)	Stable-COPD	AE-COPD
		(n=92)	(n=112)
Age(year)	75.433±3.846	76.870±6.385	76.866±7.039	NS
Smoking status, n(%)	48(80%)	73(79.35%)	79(70.54%)	NS
Gender
Male	47(78.33%)	72(78.26%)	80(71.43%)	NS
Female	13(21.67%)	20(21.74%)	32(28.57%)

Note: Statistically no sense between the control and COPD groups.

Abbreviations: COPD, chronic obstructive pulmonary disease; AE-COPD, acute exacerbation of chronic obstructive pulmonary disease.