Table 3 Number of comorbidities n (%) by COPD severity (frequency of Number of comorbidities in each COPD severity stage)
From: Comorbidities and COPD severity in a clinic-based cohort
Number of comorbidities | A N = 435 | B N = 391 | C N = 178 | D N = 580 | p |
|---|---|---|---|---|---|
0 | 160 (36.7) | 90(23) | 64(35.9) | 136(23.4) | < 0.0001 |
1 | 121(27.8) | 104(26.6) | 53(29.8) | 136(23.4) | < 0.0001 |
2 | 94(21.6) | 83(21.2) | 33(18.5) | 132(22.7) | < 0.0001 |
3 | 40(9.2) | 60(15.3) | 17(9.5) | 75(12.9) | < 0.0001 |
4 | 16(3.7) | 30(7.7) | 5(2.8) | 45(7.8) | < 0.0001 |
5 | 2(0.4) | 21(5.4) | 3(1.7) | 34(5.9) | < 0.0001 |
6 and more | 2(0.4) | 3(0.7) | 3(1.7) | 22(2.1) | < 0.0001 |