Marked Improvement in Nocturnal Gastroesophageal Reflux in a Large Cohort of Patients With Obstructive Sleep Apnea Treated With Continuous Positive Airway Pressure | Critical Care Medicine | JAMA Internal Medicine | JAMA Network
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Original Investigation
January 13, 2003

Marked Improvement in Nocturnal Gastroesophageal Reflux in a Large Cohort of Patients With Obstructive Sleep Apnea Treated With Continuous Positive Airway Pressure

Author Affiliations

From the Division of Gastroenterology, Department of Medicine, Duke University, Durham, NC (Drs Green and O'Connor); and Sleep Disorders Center, University of South Alabama, Mobile (Dr Broughton).

Arch Intern Med. 2003;163(1):41-45. doi:10.1001/archinte.163.1.41

Background  Nocturnal gastroesophageal reflux (nGER) is common in patients with obstructive sleep apnea (OSA). Small, short-term studies have shown that treatment with nasal continuous positive airway pressure (CPAP) decreases esophageal acid exposure.

Objective  To examine the relationship between OSA and nGER, and the effect of CPAP on nGER, in a long-term follow-up study of a large cohort of patients with OSA and nGER.

Methods  We prospectively studied 331 patients diagnosed as having OSA between October 1, 1993, and November 30, 2000. At baseline, patients graded their frequency of nGER symptoms on a scale of 1 (never) to 5 (always). All patients were prescribed CPAP for their OSA. At follow-up, the frequency of nGER symptoms was obtained by telephone interview.

Results  Of the 331 patients with OSA, nGER was present in 204 (62%) before treatment with CPAP. Follow-up was obtained in 181 patients (89%). Of these 181 patients, 165 (91%) were still using CPAP and 16 (9%) were not, forming the treatment and control groups, respectively. The patients compliant with CPAP had a significant improvement in nGER score, from a mean of 3.38 before CPAP treatment to 1.75 after treatment (48% improvement; P<.001), while patients not using CPAP (control subjects) showed no improvement (mean, 3.56 to 3.44; P = .55). There was a strong correlation between CPAP pressure and improvement in nGER score (correlation, r = 0.70; P<.001), with patients with higher CPAP pressures demonstrating a greater improvement in nGER score.

Conclusions  Nocturnal GER is common in patients with OSA. Treatment with nasal CPAP decreases the frequency of nGER symptoms by 48%. Higher nasal CPAP pressures are associated with greater improvement in nGER.