Table 1

Baseline (year 1) demographic and clinical characteristics of patients before and after COPD diagnosis

VariablesPrior to COPD diagnosis
(n=11 482)
After COPD diagnosis
(n=1778)
Total
(n=13 260)
Age, mean (SD), years69 (10)70 (9)69 (10)
Sex, male, no. (%)6526 (57)1029 (58)7555 (57)
Body mass index, mean (SD), kg/m227 (6)27 (6)27 (6)
Body mass index, no. (%) with data11 409 (99)1759 (99)13 168 (99)
 Underweight403 (3)85 (5)488 (4)
 Normal weight4066 (36)643 (37)4709 (36)
 Overweight4070 (36)588 (33)4658 (35)
 Obese2870 (25)443 (25)3313 (25)
Smoking status, no. (%)
 Active smoker4467 (39)648 (36)5115 (39)
 Former smoker7015 (61)1130 (64)8145 (61)
COPD severity, no. (%) with data5859 (51)925 (52)6784 (51)
 Mild1957 (33)293 (32)2250 (33)
 Moderate2831 (48)433 (47)3264 (48)
 Severe975 (17)177 (19)1152 (17)
 Very severe96 (2)22 (2)118 (2)
COPD exacerbations in the past year, mean (SD)0.3 (0.9)0.5 (1.3)0.3 (1.0)
COPD exacerbations in the past year, no. (%)
 09736 (85)1395 (79)11 131 (84)
 1998 (8)195 (11)1193 (9)
 2433 (4)79 (4)512 (4)
 >2315 (3)109 (6)424 (3)
Forced expiratory volume in 1 s, mean (SD), L0.7 (0.2)0.7 (0.2)0.7 (0.2)
Emphysema, no. (%)646 (6)248 (14)894 (7)
Diabetes, no. (%)1771 (15)280 (16)2051 (16)
Hypertension, no. (%)5317 (46)823 (46)6140 (46)
Coronary artery disease, no. (%)675 (6)106 (6)781 (6)
Acute myocardial infarction, no. (%)822 (7.)144 (8)966 (7)
Congestive cardiac failure, no. (%)719 (6)110 (6)829 (6)
Anxiety, no. (%)938 (8)142 (8)1080 (8)
Depression, no. (%)3490 (30)582 (33)4072 (31)
Treatment, no. (%)
 ICS5082 (44)1056 (59)6138 (46)
 ICS+LABA4486 (39)969 (55)5455 (41)
 LAMA5363 (47)985 (55)6348 (48)
 LABA1101 (10)147 (8)1248 (9)
 SAMA581 (5)100 (6)681 (5)
 Mucolytics1028 (9)231 (13)1259 (10)
  • COPD, chronic obstructive pulmonary disease; ICS, inhaled corticosteroids; LABA, long-acting beta agonist; LAMA, long-acting antimuscarinic; SAMA, short-acting antimuscarinic.