Results: We found that 29 (22.0%) patients with asthma and 22 (21.6%) patients with COPD had GERD. There was no difference in the FSSG scale between the diseases. The patients with GERD, regardless of having asthma or COPD, had lower LCQ scores affecting all health domains and lower ACT or higher CAT scores than those without GERD. Overall, the patients with COPD had lower LCQ scores regardless of the presence or absence of GERD. The FSSG scale was negatively correlated with the LCQ total score in asthma and in COPD. In contrast, the FSSG scale was positively correlated with the CAT score but not with the ACT score.
Conclusions: Patients with GERD had impaired cough-related quality of life, poor asthma control or more symptoms and impacts of COPD.