Table 2.
Number of comorbidities in patients with COPD according to phenotypes and severity of the disease
| Number of comorbidities* | Predominant airway disease (n=222) | Predominant emphysema (n=190) | χ2 P-value | Mild disease (n=284) | Severe disease (n=128) | χ2 P-value |
|---|---|---|---|---|---|---|
| 0 | 29 (13%) | 36 (19%) | 39 (13%) | 26 (20%) | ||
| 1 | 72 (32.4%) | 67 (35.3%) | 96 (34%) | 43 (34%) | ||
| 2 | 74 (33.3%) | 52 (27.4%) | 88 (31%) | 38 (29.7%) | ||
| 3 | 32 (14.4%) | 22 (11.6%) | 40 (14%) | 14 (11%) | ||
| 4 | 11 (5%) | 9 (4.7%) | 16 (6%) | 4 (3%) | ||
| 5 | 2 (1%) | 3 (1.6%) | 2 (0.7%) | 3 (2.3%) | ||
| 6 | 2 (1%) | 1 (0.5%) | 3 (1%) | 0 | ||
| 0–2 | 175 | 155 | 0.53 | 223 | 107 | 0.28 |
| 3–6 | 47 | 35 | ns | 61 | 21 | ns |
Notes:
*
No patient has more than six comorbidities. The Fisher’s exact test was used to compare the prevalence of comorbidities in the different subsets of patients. Significance was set at P<0.05.
Abbreviations: COPD, chronic obstructive pulmonary disease; ns, nonsignificant.