A shorter period between eating and going to sleep increased the risk of GERD during pregnancy by approximately 12%, according to data from 400 women.
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Gastroesophageal reflux disease (GERD) is a common condition in pregnancy because of changes in gastrointestinal motility caused by hormonal changes, and a short meal-to-bed time (MTBT) also has been associated with increased GERD symptoms, but data on the impact of MTBT on GERD in pregnant women in particular are lacking, wrote Duc T. Quach, MD, of the University of Medicine and Pharmacy in Ho Chi Minh City, Vietnam, and colleagues.
In a cross-sectional study published in the Journal of Clinical Gastroenterology, the researchers identified 400 pregnant women aged 18 years and older in various stages of pregnancy who were seen at a single hospital in Vietnam. A short MTBT was defined as going to bed 2 hours or less after eating. Primary outcomes were GERD, defined as troublesome heartburn and/or regurgitation at least once a week, and reflux-related insomnia, defined as trouble initiating or maintaining nighttime sleep. Participants also reported the number of days of troublesome reflux symptoms and frequency of reflux-related insomnia over the last 7 days.
A total of 154 participants had a diagnosis of GERD, for an overall prevalence of 38.5%, similar to that seen in GERD studies of GERD and pregnancy, the researchers noted, and of those with GERD, 20 participants (13.0%) reported reflux-related insomnia.
The overall prevalence of heartburn, regurgitation, nausea with or without vomiting, and epigastric pain were 11.8%, 35.8%, 30.0%, and 5.5%, respectively. A total of 139 women reported reflux symptoms on at least 2 of the past 7 days, and 40 women reported both daytime and nighttime reflux symptoms.
Short meal-to-bed time shows strongest association
A short MTBT was the strongest predictor of GERD in multivariate analysis (odds ratio, 12.73; 95% confidence interval, 2.92-55.45; P = .001); previous history of reflux symptoms (OR, 9.05; 95% CI, 5.29-15.50; P < 001) and being in the third trimester versus first or second of pregnancy (OR, 1.66, 95% CI, 1.03-2.69; P = .039) also remained significant predictors in a multivariate analysis. In addition, nighttime short MTBT (but not daytime short MTBT) was the strongest risk factor for reflux-related insomnia (OR, 4.60), although alcohol consumption and a history of reflux-related symptoms also remained significant in multivariate analysis.
“Interestingly, the number of days during which reflux symptoms were experienced during the last 7 days sequentially increased across subgroups of participants with no short MTBT, either daytime or nighttime short MTBT, and with both daytime and nighttime MTBT,” the researchers wrote. At 4-7 days, none of the patients with no short MTBT reported reflux symptoms, compared with 7.5% of those with either daytime or nighttime MTBT and 20.9% of those with both daytime and nighttime MTBT.
The study findings were limited by several factors, including the inability to accurately record participants’ diets and the potential for overestimating the odds ratio of risk factors in patients with reflux-related insomnia because of the small numbers. However, the results support findings from previous studies and suggest that dietary modifications could provide a nonpharmacological treatment target for managing GERD in pregnant women, they concluded.