General characteristics of study subjects
Characteristics | COPD (N=3,145) |
NCOPD (N=16,748) |
P-value | Obstructive severity | |||
---|---|---|---|---|---|---|---|
Mild (N=1,459) |
Moderate (N=1,534) |
Severe, very severe (N=152) |
P-value | ||||
Age (y) | 64.18±0.25 | 53.76±0.11 | <0.001 | 65.56±0.36 | 62.93±0.35 | 63.96±0.96 | <0.001 |
Age group (y) | |||||||
40–49 | 212 (10.6) | 5,665 (41.8) | <0.001 | 80 (8.3) | 130 (13.3) | 2 (3.9) | <0.001 |
50–59 | 595 (22.6) | 5,416 (31.6) | 237 (20.1) | 320 (24.1) | 38 (31.4) | ||
60–69 | 1,141 (30.2) | 3,728 (16.2) | 500 (28.9) | 590 (31.7) | 51 (27.4) | ||
70–79 | 1,197 (36.6) | 1,939 (10.4) | 642 (42.8) | 494 (30.9) | 61 (37.3) | ||
Sex | |||||||
Male | 2,254 (73.1) | 5,895 (43.1) | <0.001 | 1,046 (72.4) | 1,093 (73.3) | 115 (77.8) | 0.454 |
Female | 891 (26.9) | 10,853 (56.9) | 413 (27.6) | 441 (26.7) | 37 (22.2) | ||
Houshold income | |||||||
First quartile | 771 (26.3) | 3,708 (23.5) | 0.006 | 334 (23.6) | 378 (27.5) | 59 (39.3) | 0.009 |
Second quartile | 782 (26.2) | 4,136 (25.4) | 363 (27.8) | 390 (25.4) | 29 (19.3) | ||
Third quartile | 792 (24.9) | 4,262 (25.5) | 373 (24.5) | 383 (25.1) | 36 (27.0) | ||
Fourth quartile | 741 (22.6) | 4,463 (25.6) | 371 (24.1) | 343 (21.9) | 27 (14.5) | ||
BMI | |||||||
<18.5 | 87 (2.9) | 241 (1.3) | <0.001 | 22 (1.9) | 43 (2.8) | 22 (13.2) | <0.001 |
18.5≤BMI<25.0 | 2,119 (66.6) | 10,485 (61.8) | 1,046 (69.9) | 977 (63.8) | 96 (63.7) | ||
≥25 | 939 (30.5) | 6,022 (36.9) | 391 (28.2) | 514 (33.4) | 34 (23.1) | ||
Smoking status | |||||||
Never | 1,002 (31.1) | 10,957 (59.8) | <0.001 | 461 (31.3) | 502 (31.5) | 39 (25.6) | 0.011 |
Former | 897 (28.9) | 2,373 (16.2) | 457 (32.1) | 399 (25.9) | 41 (28.6) | ||
Current | 1,183 (40.0) | 3,147 (24.0) | 520 (36.6) | 594 (42.6) | 69 (45.8) |
Values are presented as number (%) or mean±standard deviation.
COPD, chronic obstructive pulmonary disease; NCOPD, non-chronic obstructive pulmonary disease; BMI, body mass index.