From: Associations between chronic comorbidity and exacerbation risk in primary care patients with COPD
 | Patients with full follow-up (study population)a (n = 14,603) | Subgroups of study population | |
---|---|---|---|
Patient characteristics |  | Patients with <2 exacerbations/year (n = 13,709) | Patients with ≥2 exacerbations/year (n = 894)b |
Sex, male, n (%) | 7,749 (53 · 1) | 7,322 (53 · 4) | 427 (47 · 8)‡ |
Age at study baseline, years; mean (SD; range) | 66 · 5 (11 · 5; 40–110)‡ | 66 · 5 (11 · 6; 40–110) | 67 · 4 (10 · 3; 40–93)‡ |
Full dataset available (censored data), n (%) | |||
 Full data available |  | 13,709 (93 · 9) | 894 (6 · 1) |
 Deceased | N/A | N/A | N/A |
 Moved | N/A | N/A | N/A |
 Nursing home | N/A | N/A | N/A |
 Unknown | N/A | N/A | N/A |
Comorbidity data | |||
Number of comorbid diseasesc, mean (SD; range) | 3 · 0 (2 · 3;0–20)‡ | 3 · 0 (2 · 3;0–16) | 3 · 4 (2 · 5; 0–20)‡ |
Number of comorbid diseases categoriesc, n (%) | |||
 0 | 1,777 (12 · 2) | 1,700 (12 · 4) | 77 (8 · 6) |
 1 or 2 | 5,305 (36 · 6) | 5,021 (36 · 6) | 284 (31 · 8) |
 3 or 4 | 4,258 (29 · 2) | 3,977 (29 · 0) | 281 (31 · 4) |
 5 and more | 3,263 (22 · 3)‡ | 3,011 (22 · 0) | 252 (28 · 2)‡ |
Exacerbations | |||
Number of exacerbationsd, mean (SD; range) | 0 · 75 (1 · 5;0–15)‡ | 0 · 44 (0 · 8;0–2) | 5 · 6 (2 · 0;3–15)‡ |