Hospitalized COPD Patients With GERD Have Better Outcomes

BOSTON — Gastroesophageal reflux disease (GERD) is associated with better in-hospital outcomes for patients hospitalized with chronic obstructive pulmonary disease (COPD). The finding is a surprise, considering that GERD has been associated with more COPD exacerbations. GERD is also more common among patients with COPD than in the general population.

“It was a very surprising result. We double-checked the analysis once we got it the first time because the whole expectation was that the outcomes will be worse. But because it’s a retrospective study and it’s based on a national database, there are some limitations,” said ABM Nasibul Alam, MD, who presented the study at the American College of Chest Physicians (CHEST) 2024 Annual Meeting. Alam is an internal medicine resident at Northwestern Medicine McHenry Hospital, McHenry, Illinois.

One possible conclusion is that acid reflux therapies received in hospital may be benefitting COPD. The retrospective nature of the study precludes establishing a causal relationship, but there are possible mechanisms that could account for a benefit, according to Alam.

“They might prevent micro-aspirations or silent aspirations in COPD patients. Sometimes you may not have a clinical diagnosis of GERD, but the patient might have silent micro-aspirations, so it might contribute to decreasing that,” said Alam.

The study was conducted to fill a gap in the literature. “Some studies have shown that the lung function in COPD patients gets moderately decreased if they have coexisting GERD, but there aren’t any studies that have looked into how it impacts COPD patients when they’re hospitalized, and especially acute complications,” said Alam.

The researchers retrospectively analyzed data from the Nationwide Readmissions Database from 2017 to 2020, utilizing ICD-10 codes to identify 3,798,952 hospitalized adults with a primary diagnosis of COPD, of which 26.97% also had GERD. Individuals without GERD were more likely to be male (47.72% vs 39.88%).

After multivariate adjustment, the presence of GERD was associated with a lower mortality rate (adjusted odds ratio [aOR], 0.717; P respiratory failure (aOR, 0.915; P mechanical ventilation (aOR, 0.907; P P acute kidney injury (aOR, 0.877; P septic shock (aOR, 0.731; P heart failure (aOR, 0.762; P

Despite these improved in-hospital outcomes, the researchers found that patients with GERD were at a higher risk for 30-day readmission (aOR, 1.08; P P P

There have also been studies suggesting that GERD can directly lead to worse lung function among patients with COPD. “So it will be interesting to see if these medications have some kind of impact on the lung function as well. We need more robust studies [to determine that],” said Alam.

It is also important to keep in mind the long-term risk of proton pump inhibitors, especially in older patients. “We have to have good data before we start recommending this,” said Alam.

He suggested that physicians should begin to think more holistically about COPD management and consider the comorbidities. Alam noted that he has studied vitamin B12 deficiency in patients with COPD and found an association with cardiovascular comorbidities. “There are so many comorbidities with COPD. COPD itself puts patients at risk of cardiovascular comorbidity, for example. So when we have patients with COPD, we have to think about all those comorbidities and have to manage the patients comprehensively rather than just focusing on the specific targeted interventions,” said Alam.

The study should encourage further research, according to Kunal Deokar, MD, who moderated the session where the study was presented. “It does give us a signal that probably we should have more studies to look into whether patients hospitalized for COPD with GERD really have lower mortality rates, and what will be the effect of treatment on these patients,” said Deokar, who is an assistant professor of pulmonary medicine at the All India Institute of Medical Sciences, Delhi, India.

Alam and Deokar disclosed no relevant financial relationships.