表 1.

两组患者人口学资料和临床特征

Demographic data and clinical characteristics of two groups

	Control group (n=36)	Exercise group (n=38)	P
BMI: body mass index; COPD: chronic obstructive pulmonary disease; FVC: forced vital capacity; FEV1: forced expiration volume in one second. COPD severity: level Ⅰ refers to patients whose FVC is greater than 80% of its predicted value; level Ⅱ refers to patients whose FVC is between 50% and 80% of predicted value; level Ⅲ refers to patients whose FVC is between 30% and 50% of predicted value; level Ⅳ refers to patients whose FVC is less than 30% of predicted value.
Male sex	25 (69.4%)	25 (65.8%)	0.416
Age (yr)	69.4±4.9	68.5±4.23	0.445
BMI (kg/m2)	23.6±2.3	24.3±1.6	0.196
Married	23 (63.9%)	26 (68.4%)	0.149
Education length (yr)	3.5 (1.6%)	3.2 (1.4%)	0.585
Diabetes mellitus	6 (16.7%)	7 (18.4%)	0.857
Coronary artery disease	5 (13.9%)	6 (15.8%)	0.785
Hypertension	18 (50.0%)	20 (52.6%)	0.636
Peripheral arterial disease	6 (16.7%)	9 (23.7%)	0.215
Preoperative treatment	5 (13.9%)	8 (21.1%)	0.131
COPD history (yr)	11.3±3.9	12.8±3.5	0.249
COPD severity			0.337
Level Ⅰ	7 (19.4%)	9 (23.7%)
Level Ⅱ	24 (66.7%)	25 (65.8%)
Level Ⅲ	5 (13.9%)	4 (10.5%)
Level Ⅳ	0 (0.0%)	0 (0.0%)