Table 1.

The clinical information of individuals enrolled in the study.

	COPD	Health control	p
Age
≤60	33	38	0.310
>60	79	65
Gender
Male	66	65	0.674
Female	46	38
BMI (kg/m2)	26.21 ± 4.33	25.55 ± 5.02	0.467
Smoking status
Yes	72	73	0.312
No	40	30
Smoking index
0-200	76	68	0.580
>200	36	35
Score of mMRC	2.66 ± 0.92
Clinical history of COPD
≤10	33
>10 ≤ 20	45
>20	34