Table 3.
Characteristics of patients included in the study
| Characteristic | Overall | Those with hospital discharge information |
|---|---|---|
|
| ||
| N=27,182 (N [%]) | N=40 (N [%]) | |
| Age group (years) | ||
| ≤55 | 5,003 (18.4) | 7 (17.5) |
| 55–64 | 7,746 (28.5) | 16 (40.0) |
| 65–74 | 8,537 (31.4) | 12 (30.0) |
| ≥75 | 5,896 (21.7) | 5 (12.5) |
| Sex | ||
| Male | 14,556 (53.6) | 18 (45.0) |
| MRC breathlessness scale (kg/m2; N=21,151) | ||
| <3 | 9,645 (45.6) | 21 (53.8) |
| ≥3 | 11,506 (54.4) | 18 (46.2) |
| BMI (N=26,447) | ||
| <19 | 1,441 (5.5) | 1 (2.5) |
| 19–25 | 9,568 (36.2) | 18 (45.0) |
| ≥25 | 15,438 (58.4) | 21 (52.5) |
| GOLD 2006 grade (N=14,055) | ||
| 1 | 2,829 (20.1) | 4 (16.7) |
| 2 | 6,116 (43.5) | 6 (25.0) |
| 3 | 4,075 (29.0) | 10 (41.7) |
| 4 | 1,035 (7.4) | 4 (16.7) |
| Smoking status | ||
| Ex-smoker | 10,963 (40.3) | 19 (47.5) |
| Current smoker | 16,219 (59.7) | 21 (52.5) |
| Index of multiple deprivation quintile (N=25,852) | ||
| 1 (least deprived) | 3,632 (14.1) | 8 (20.0) |
| 2 | 5,259 (20.3) | 7 (17.5) |
| 3 | 4,989 (19.3) | 7 (17.5) |
| 4 | 5,794 (22.4) | 6 (15.0) |
| 5 (most deprived) | 6,178 (23.9) | 12 (30.0) |
Abbreviations: MRC, Medical Research Council; BMI, body mass index; GOLD, Global Initiative for Chronic Obstructive Lung Disease.