Table 1 Study population
From: Differences in systemic adaptive immunity contribute to the ‘frequent exacerbator’ COPD phenotype
Characteristics | Frequent exacerbation (n = 8) | Infrequent exacerbation (n = 16) | p |
|---|---|---|---|
Age (years) | 80.6 ± 11.2 | 74.1 ± 8.0 | 0.169 |
Gender (male) | 6 | 11 | 0.751 |
Exacerbation Frequency (/y) | 3.82 ± 0.92 | 1.70 ± 0.81 | NA |
Smoking Status (ex-smoker) | 7 | 10 | 0.204 |
Pack years | 51.6 ± 30.4 | 44.9 ± 26.7 | 0.605 |
FEV1 (L) | 1.21 ± 0.47 | 1.54 ± 0.64 | 0.163 |
FVC (L) | 2.41 ± 0.58 | 2.96 ± 0.86 | 0.079 |
FEV1 %pred (%) | 52.6 ± 19.4 | 53.7 ± 18.4 | 0.892 |
FVC %pred (%) | 91.1 ± 32.7 | 82.9 ± 18.7 | 0.527 |
FEV1/FVC | 0.52 ± 0.20 | 0.51 ± 0.15 | 0.928 |