Table 4 Comorbidities frequency (> = 2 vs 0–1)by COPD severity (statistical test to compare the distribution of comorbidity frequency in each severity stage)
From: Comorbidities and COPD severity in a clinic-based cohort
Comorbidity frequency | GOLD 2011 | p value | |||
|---|---|---|---|---|---|
A N = 435 | B N = 391 | C N = 178 | D N = 580 | ||
0–1864(54.55%) | 281(32.5%) | 194(22.4%) | 117(13.5%) | 272(31.4%) | < 0.0001 |
≥2720(45.45%) | 154(21.3%) | 197(27.3%) | 61(8.4%) | 308(42.7%) | |