Table 3.
Relationship between various parameters and bacterial isolation
| Culture
|
PCR
|
|||||
|---|---|---|---|---|---|---|
| Bacterial isolation | No bacterial isolation | P-value | Bacterial isolation | No bacterial isolation | P-value | |
| Age (mean, years) | 66 | 65 | 0.483 | 65.7 | 64.4 | 0.574 |
| Sex (n, female/male) | 10/31 | 18/55 | 0.381 | 19/58 | 9/28 | 0.599 |
| CRP (mean, mg/mL) | 47.6 | 46 | 0.902 | 41.2 | 34.8 | 0.750 |
| Leukocytes (mean, ×109 cells/L) | 13.0 | 10.5 | 0.204 | 11.6 | 11.5 | 0.942 |
| Sedimentation (mean, mm/hour) | 32.2 | 21.8 | 0.114 | 28.4 | 23.1 | 0.435 |
| FEV1 (mean, % predicted) | 57.8 | 53.6 | 0.251 | 54.7 | 59.5 | 0.184 |
| CAT (mean) | 19.8 | 16.5 | 0.159 | 18.5 | 16.0 | 0.301 |
| Exacerbations (mean) | 1.5 | 1.0 | 0.083 | 1.43 | 0.84 | 0.002 |
| GOLD class (n, groups A/B/C/D) | 4/11/9/18 | 10/19/20/23 | 0.325 | 8/19/18/29 | 6/11/11/12 | 0.801 |
Abbreviations: CAT, COPD Assessment Test; COPD, Chronic Obstructive Lung Disease; CRP, C-reactive protein; FEV1, forced expiratory volume in 1 second; GOLD, Global Initiative for Chronic Obstructive Lung Disease; PCR, polymerase chain reaction.