Spirometric parameter H. pylori seropositive COPD patients (n=23) H. pylori seronegative COPD patients (n=17) P-value FEV1 (%pred) 54.2 ± 11.2 54.3 ± 10.5 >0.05 FVC (%pred) 54.1 ± 6.4 52.4 ± 11.1 >0.05 FEV1/FVC 1.00 ± 0.02 1.04 ± 0.04 >0.05

Table 3: Mean baseline values of spirometric parameters in H. pylori seropositive and seronegative COPD patients.