Included | Excluded | P-value | |
---|---|---|---|
Number of patients | 292 | 425 | - |
Age (year), mean (SD) | 67.3 (8.58) | 67.9 (9.5) | 0.3564 |
Male, n (%) | 214 (73.29 %) | 268 (63 %) | 0.005 |
Race, n (%) | |||
New Zealand European | 287 (98.29 %) | 414 (97.6 %) | 0.637 |
Maori/Pacific Islander | 3 (1.03 %) | 6 (1.4 %) | |
Other | 2 (0.68 %) | 4 (1 %) | |
Height (cm), mean (SD) | 169.8 (8.6) | 168 (8.8) | 0.018 |
Weight (kg), mean (SD) | 72.6 (16.5) | 72.6 (16) | 0.993 |
Smoking history, n (%) | |||
Current smoker | 71 (24.32 %) | 116 (28 %) | 0.272 |
Ex-smoker | 221 (75.68 %) | 298 (72 %) | |
Average tobacco consumption (pack year), mean (SD) | 56.58 (33.3) | 53.7 (30) | 0.355 |
Number of previous exacerbations within 2 years, mean (SD) | 5.11 (2.4) | 4.15 (2.5) | <0.0001 |
Spirometry | |||
FEV1 (l), mean (SD) | 0.935 (0.43) | 1.17 (0.67) | 0.0001 |
FEV1 (% predicted), mean (SD) | 34 (14.8) | 43.5 (23) | <0.0001 |
FVC (l), mean (SD) | 2.23 (0.83) | 2.28 (0.93) | 0.7983 |
FEV1/FVC mean (SD) | 42 (10.2) | 50 (14.8) | <0.0001 |