Impact of gastroesophageal reflux on longitudinal lung function and quantitative computed tomography in the COPDGene cohort.

Abstract:

RATIONALE:Gastroesophageal reflux disease (GERD) is a common comorbidity in chronic obstructive pulmonary disease (COPD) and has been associated with increased risk of acute exacerbations, hospitalization, emergency room visits, costs, and quality-of-life impairment. However, it remains unclear whether GERD contributes to the progression of COPD as measured by lung function or computed tomography. OBJECTIVE:To determine the impact of GERD on longitudinal changes in lung function and radiographic lung disease in the COPDGene cohort. METHODS:We evaluated 5728 participants in the COPDGene cohort who completed Phase I (baseline) and Phase II (5-year follow-up) visits. GERD status was based on participant-reported physician diagnoses. We evaluated associations between GERD and annualized changes in lung function [forced expired volume in 1 s (FEV1) and forced vital capacity (FVC)] and quantitative computed tomography (QCT) metrics of airway disease and emphysema using multivariable regression models. These associations were further evaluated in the setting of GERD treatment with proton-pump inhibitors (PPI) and/or histamine-receptor 2 blockers (H2 blockers). RESULTS:GERD was reported by 2101 (36.7%) participants at either Phase I and/or Phase II. GERD was not associated with significant differences in slopes of FEV1 (difference of - 2.53 mL/year; 95% confidence interval (CI), - 5.43 to 0.37) or FVC (difference of - 3.05 mL/year; 95% CI, - 7.29 to 1.19), but the odds of rapid FEV1 decline of ≥40 mL/year was higher in those with GERD (adjusted odds ratio (OR) 1.20; 95%CI, 1.07 to 1.35). Participants with GERD had increased progression of QCT-measured air trapping (0.159%/year; 95% CI, 0.054 to 0.264), but not other QCT metrics such as airway wall area/thickness or emphysema. Among those with GERD, use of PPI and/or H2 blockers was associated with faster decline in FEV1 (difference of - 6.61 mL/year; 95% CI, - 11.9 to - 1.36) and FVC (difference of - 9.26 mL/year; 95% CI, - 17.2 to - 1.28). CONCLUSIONS:GERD was associated with faster COPD disease progression as measured by rapid FEV1 decline and QCT-measured air trapping, but not by slopes of lung function. The magnitude of the differences was clinically small, but given the high prevalence of GERD, further investigation is warranted to understand the potential disease-modifying role of GERD in COPD pathogenesis and progression. CLINICAL TRIALS REGISTRATION:NCT00608764 .

journal_name

Respir Res

journal_title

Respiratory research

authors

Baldomero AK,Wendt CH,Petersen A,Gaeckle NT,Han MK,Kunisaki KM,COPDGene Investigators.

doi

10.1186/s12931-020-01469-y

subject

Has Abstract

pub_date

2020-08-03 00:00:00

pages

203

issue

1

eissn

1465-9921

issn

1465-993X

pii

10.1186/s12931-020-01469-y

journal_volume

21

pub_type

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