Association between C pneumoniae chronic infection and severity of lung function impairment in 42 patients with steady state chronic bronchitis (stage 1)
| FEV1 ≤35% | FEV1 35–50% | FEV1 >50% | |
|---|---|---|---|
| FEV1=forced expiratory volume in 1 second. | |||
| p<0.01. | |||
| C pneumoniae +ve (n=16) | 8 | 4 | 4 |
| C pneumoniae –ve (n=26) | 2 | 8 | 16 |