Sleep Positional Therapy for Nocturnal Gastroesophageal Reflux: A Double-Blind, Randomized, Sham-Controlled Trial

Background & Aims: Experimental studies have suggested that sleep position plays a role in the occurrence of nocturnal gastroesophageal reflux and the left lateral decubitus position is most favorable. The aim of this study was to evaluate the effect of a novel electronic sleep positional therapy wearable device on sleep position and nocturnal reflux symptoms. Methods: We performed a double-blind, randomized, sham-controlled trial in patients with nocturnal symptoms of gastroesophageal reflux. Patients were advised to sleep in the left lateral decubitus position and were assigned randomly (1:1) to an electronic sleep positional therapy wearable device, programmed to either produce a vibration when in the right lateral position (intervention) or only during the first 20 minutes (sham). The primary outcome was treatment success, defined as a 50% or more reduction in the nocturnal reflux score. Secondary outcomes included change in sleep position and reflux symptoms. Results: One hundred patients were randomized. In the intention-to-treat analysis, the rate of treatment success was 44% in the intervention group (22 of 50) vs 24% in the sham group (12 of 50) (risk difference, 20%; 95% CI, 1.8%–38.2%; P =.03). Treatment led to a significant avoidance of sleeping in the right lateral decubitus position (intervention 2.2% vs sham 23.5%; P =.000) and increased time sleeping in the left lateral decubitus position (intervention 60.9% vs sham 38.5%; P =.000). More reflux-free nights were observed in the intervention group (intervention 9 nights [interquartile range, 6–11 nights] vs sham 6 nights [interquartile range, 3–9 nights]; P =.01). Conclusions: Sleep positional therapy using an electronic wearable device promotes sleeping in the left lateral decubitus position and effectively alleviates nocturnal reflux symptoms compared with sham treatment (https://www.trialregister.nl, NL8655).