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Review Article |

Are Lifestyle Measures Effective in Patients With Gastroesophageal Reflux Disease?  An Evidence-Based Approach FREE

Tonya Kaltenbach, MD; Seth Crockett, MD; Lauren B. Gerson, MD, MSc
[+] Author Affiliations

Author Affiliations: Division of Gastroenterology and Hepatology (Drs Kaltenbach and Gerson) and Department of Medicine (Dr Crockett), Stanford University School of Medicine, Stanford, Calif.


Arch Intern Med. 2006;166(9):965-971. doi:10.1001/archinte.166.9.965.
Text Size: A A A
Published online

Lifestyle modifications are first-line therapy for patients with gastroesophageal reflux disease (GERD). We applied an evidence-based approach to determine the efficacy of lifestyle measures for GERD management. We used PubMed and Ovid to perform a search of the literature published between 1975 and 2004 using the key words heartburn, GERD, smoking, alcohol, obesity, weight loss, caffeine or coffee, citrus, chocolate, spicy food, head of bed elevation, and late-evening meal. Each study was reviewed by 2 reviewers who assigned one of the following ratings: evidence A, randomized clinical trials; evidence B, cohort or case-control studies; evidence C, case reports or flawed clinical trials; evidence D, investigator experience; or evidence E, insufficient information. We screened 2039 studies and identified 100 that were relevant. Only 16 clinical trials examined the impact on GERD (by change in symptoms, esophageal pH variables, or lower esophageal sphincter pressure) of the lifestyle measure. Although there was physiologic evidence that exposure to tobacco, alcohol, chocolate, and high-fat meals decreases lower esophageal sphincter pressure, there was no published evidence of the efficacy of dietary measures. Neither tobacco nor alcohol cessation was associated with improvement in esophageal pH profiles or symptoms (evidence B). Head of bed elevation and left lateral decubitus position improved the overall time that the esophageal pH was less than 4.0 (evidence B). Weight loss improved pH profiles and symptoms (evidence B). Weight loss and head of bed elevation are effective lifestyle interventions for GERD. There is no evidence supporting an improvement in GERD measures after cessation of tobacco, alcohol, or other dietary interventions.

Gastroesophageal reflux disease (GERD) is characterized by symptoms of substernal burning or acid regurgitation produced by the abnormal reflux of gastric contents into the esophagus.1According to US population surveys, 44% of all Americans experience heartburn at least once per month, 14% at least once per week, and up to 7% daily.2,3 The major mechanism for GERD is transient relaxation of the lower esophageal sphincter (LES).4 Recommendations for lifestyle modifications are based on the presumption that certain foods, body position, tobacco, alcohol, and obesity contribute to a dysfunction in the body's antireflux defense system. Accordingly, the American College of Gastroenterology recommends the use of lifestyle changes, including elevation of the head of the bed (HOB); decreased fat, chocolate, alcohol, peppermint, and coffee intake; cessation of smoking; and avoiding recumbency for 3 hours postprandially, in addition to antireflux medical treatment.1 However, the evidence to support such lifestyle modification recommendations has not been well substantiated. The purpose of this study is to apply an evidence-based approach to the literature to determine which lifestyle measures are most likely to benefit patients with GERD.

We performed a systematic review of the English-language literature relating to human subjects published between 1975 and 2004 using PubMed and Ovid to obtain data pertaining to the effects of lifestyle modifications on GERD. We included the following key words in the search: lifestyle modification, heartburn, GERD, reflux, smoking, alcohol, obesity, weight loss, caffeine or coffee, citrus, chocolate, mint, carbonated beverages, spicy food, fatty foods, head of bed elevation, and late-evening meal.

To be included in the study, trials had to contain a lifestyle intervention and outcomes of GERD measures, including heartburn symptoms, ambulatory esophageal pH monitoring, and esophageal manometric variables. Studies of the physiologic effects of lifestyle interventions only are included as introductory evidence for each lifestyle intervention.

We applied an evidence-based approach to the literature using a standard scoring system (Table 1).5After 2 of us (either T.K. and L.B.G. or S.C. and L.B.G.) independently reviewed each study, evidence-based ratings of A through E were assigned. A consensus was obtained through a second review if there was a difference of opinion on initial review.

Of 2039 trials screened for relevancy, 100 were included in this analysis. Only 16 trials examined the impact of lifestyle changes on GERD variables. The subsections that follow describe the physiologic evidence of lifestyle interventions on GERD measures (Table 2), followed by the available evidence on cessation of the lifestyle measure and the impact on GERD variables (Table 3).

Table Graphic Jump LocationTable 2. Summary of Physiologic Evidence*
Table Graphic Jump LocationTable 3. Summary of Lifestyle Intervention or Cessation Trials*
SMOKING

Cigarette smoking has been associated with symptomatic GERD. Questionnaires have reported higher rates of reflux symptoms in tobacco smokers compared with nonsmokers.69 Multivariate analysis from a case-control study10 showed that duration of smoking was associated with increasing reflux symptoms, with an odds ratio (OR) for reflux of 1.7 (95% confidence interval [CI], 1.4-2.0; P<.001) in daily smokers with a greater than 20-year tobacco use history compared with those who smoked daily for less than 1 year. Cigarette smoking has been shown to prolong acid clearance and decrease baseline LES pressure (LESP),96,97 with an abrupt decline in LESP at the start of smoking that returns to normal within minutes of completion of the cigarette.98 Abrupt increases in intra-abdominal pressure, such as with coughing or deep inspiration, have been associated with reflux symptoms in smokers.11 Studies1214 that examined acid perfusion (using the Bernstein test) or esophageal pH have reported conflicting associations; for example, despite having more “reflux episodes,” smokers (compared with nonsmokers) do not show increased esophageal acid exposure time.15

No improvement was shown in 3 case-control studies (evidence B) that evaluated the effect of tobacco cessation on GERD outcomes. One study15 compared a cohort of 30 healthy volunteers (15 smokers and 15 nonsmokers) with 10 smokers with GERD and found that smokers had more reflux episodes than nonsmokers but that 24-hour smoking cessation did not reduce the total time that the esophageal pH was less than 4.0. Another study87 showed that 1-day cessation of smoking decreased the number of daily reflux episodes but did not significantly affect total esophageal acid exposure. On the contrary, Kadakia et al,88 after their evaluation of smokers with GERD who abstained from smoking for 48 hours, concluded that smoking significantly increased distal esophageal acid exposure. Although tobacco use has been associated with an adverse effect on the LES, the evidence to date does not support an improvement in GERD after cessation of tobacco use.

ALCOHOL

Alcohol consumption may precipitate GERD by increasing acid secretion through gastrin stimulation, reducing LESP, increasing spontaneous LES relaxations, and impairing esophageal motility and gastric emptying.18 Modest alcohol intake has been shown to induce reflux symptoms and decrease esophageal pH in healthy individuals without GERD symptoms1921 despite normal overall 24-hour pH measurements.22 Randomized and cross-sectional studies16,2326 have suggested an increased prevalence of symptomatic reflux in alcohol users. Wang et al16 reported reflux symptoms in 43% of heavy (≥210 g/wk) alcohol users compared with 16% of nondrinkers (OR, 2.85; 95% CI, 1.67-4.49; P<.01); however, large American9 and multinational17 cross-sectional studies have not shown similar associations.

In a case-control study27 (evidence B) that examined GERD outcomes in symptomatic alcoholic patients compared with matched groups (without alcohol consumption) of controls, patients with GERD, and patients with nutcracker esophagus, most alcoholic patients demonstrated LES hypertension, high-amplitude esophageal contractions, or nonperistaltic esophageal contractions that improved after prolonged (>6 months) alcohol abstinence but were not accompanied by improvements in esophageal pH. Therefore, although esophageal motility abnormalities were shown to improve after the cessation of alcohol use, there is insufficient evidence to support the direct effect of alcohol abstinence on pH or GERD symptoms.

OBESITY

Obesity has been speculated to cause GERD symptoms because of multiple factors, including increased (1) gastroesophageal sphincter gradient,99 (2) incidence of hiatal hernia,100102 (3) intra-abdominal pressure,103 and (4) output of bile and pancreatic enzymes.104 Although some studies28 have shown increased GERD in morbidly obese individuals, other studies29,30 did not demonstrate similar findings. Several population-based studies3133 have found a significant relationship between increasing body mass index (calculated as weight in kilograms divided by the square of height in meters) and GERD symptoms. Murray et al31 reported an adjusted OR of 1.82 (95% CI, 1.33-2.5) for overweight patients with weekly heartburn symptoms compared with 1.5 (95% CI, 1.13-1.99) for individuals of average weight. Cross-sectional studies3438 have similarly reported higher weekly reflux symptoms in obese patients. Another study39 showed that for every increment of body mass index of 5, the risk of GERD increased by 1.2. In a multivariate logistic regression model,32 women with a body mass index greater than 35 were shown to have an increased risk of GERD (OR, 6.3; 95% CI, 2.4-4.7) compared with men with a similar body mass index (OR, 3.3; 95% CI, 2.4-4.7; P<.001). Although some studies4045 have reported a link between obesity and GERD by demonstrating abnormal pH and manometric measures, other studies4651 have refuted such an association.

Bariatric surgery has been associated with improved GERD variables.105112 Given that the surgical procedure has inherent antireflux properties, it is difficult to directly assess the effect of weight loss on GERD. Five studies8993 have evaluated the independent effect of weight loss on GERD variables. Fraser-Moodie et al89 showed a significant correlation between weight loss and esophageal pH (OR, 0.55; P<.001) in an uncontrolled study of 34 obese patients with GERD. Mathus-Vliegen et al9193 demonstrated a similar correlation with a decreased upright pH less than 4 (8.0% vs 5.5%; P<.05) and postprandial reflux episodes (49.0 vs 32.1; P<.05) in patients with a mean weight loss of 12.4 kg in 13 weeks. However, in another study90 that randomized 20 obese patients with reflux esophagitis to either a 430-kcal/d diet or an unrestricted diet, there was no significant difference in reflux symptoms between controls and patients with a 10% body weight loss after 6 months. Therefore, although weight loss seems to have a promising effect on pH measures and symptoms, further randomized controlled studies are warranted to determine its exact effect on GERD outcomes.

CITRUS FRUITS AND JUICES

Citrus fruits are often cited as precipitants of heartburn symptoms. In a questionnaire of approximately 400 patients with GERD, 72% of respondents reported increased heartburn with ingestion of either orange or grapefruit juice.66 However, Price et al52 found that acid-sensitive patients (positive Bernstein test results) were sensitive to intraesophageal infusion of orange juice, even when the orange juice was adjusted to a pH of 7, suggesting that acidity is not the only factor determining the citrus effect on GERD. Cranley et al67 demonstrated that patients with GERD did not change their LESP when challenged with orange juice infusion; this was in contrast to controls who showed increased LESP. No studies, to our knowledge, have assessed the effect of avoidance of citrus on GERD.

CARBONATED BEVERAGES

Studies have postulated that carbonated beverages cause GERD.113 In one study,68 carbonated soft drink consumption was found to be a predictor of GERD symptoms in a multivariate analysis. Another small study69 of healthy individuals found equivalent decreases in LESP with ingestion of carbonated water, caffeinated cola, or caffeine-free cola compared with water ingestion. No cessation trials have been published to date, to our knowledge.

COFFEE AND CAFFEINE

Despite the fact that intraesophageal infusion of coffee in patients with acid sensitivity has been shown to cause heartburn,52 2 large epidemiologic studies16,17 found no association between coffee drinking and GERD. A recent survey10 in Norway described a negative association between coffee drinking and GERD incidence. Although some studies53,54 have described increased LESP with regular and decaffeinated coffees, another trial55 showed no effect of coffee on the number of reflux episodes, total reflux time, or LESP in patients with GERD or controls. There is conflicting evidence regarding how different coffee preparations, roasting methods, and processing methods affect GERD variables.5659 Decaffeinated compared with caffeinated coffee ingestion was associated with significantly less acid exposure time in some studies.60 Salmon et al61 noted that patients had lower postprandial LESP regardless of whether they were exposed to coffee, suggesting that the association between coffee and GERD may be confounded by the fact that people frequently drink coffee after meals. Another study62 reported that coffee decreased LESP in healthy individuals and in patients with reflux esophagitis when fasting or following a standard test meal. Given the conflicting reported data, the relationship between caffeine or coffee and GERD remains unclear. There is insufficient evidence to support the routine recommendation that patients with GERD avoid such beverages.

CHOCOLATE

Chocolate is frequently implicated as a provoker of GERD. There are limited data that chocolate may affect esophageal pH and LES profiles. One early uncontrolled study63 found that ingestion of 120 mL of chocolate syrup by 9 controls caused LESP to significantly decrease compared with baseline measurements (P<.01). In 7 patients with typical GERD symptoms, Murphy and Castell64 found greater acid exposure time after chocolate ingestion compared with ingestion of a test drink of equivalent osmolality and caloric value (P = .04). No studies have addressed the effect of chocolate abstinence on GERD symptoms.

SPICY FOODS

Although patients frequently cite spicy foods as an inciting agent in heartburn episodes, little data have been published regarding the effects of spicy food consumption on LESP or esophageal pH. Nebel et al3 conducted a survey of patients with GERD symptoms and found that 88% listed spicy foods as a precipitant of heartburn. One study65 found that in patients with GERD vs controls, onion intake increased the number of reflux episodes (P<.01) and the esophageal acid exposure time (P<.05). The results of this study have not been confirmed by other larger trials. Many patients who believe that spicy foods exacerbate their GERD symptoms may abstain from these foods although we found no published trials that studied the effect of abstinence on change in GERD symptoms.

FATTY FOODS

It has been postulated that fat increases not only reflux but also the sensitivity of the esophagus to acid exposure. In a randomized clinical trial,70 8 patients with GERD and 11 controls received either an intragastric infusion of isotonic sodium chloride or a 20% lipid solution followed by an intraesophageal infusion of hydrochloric acid. There were no significant differences in acid sensitivity symptoms with respect to the fat infusion.70 Two studies71,72 reported significantly shorter onset to heartburn symptoms or reflux episodes with acid infusion regardless of whether patients were receiving intraduodenal infusions of a lipid solution or isotonic sodium chloride. Fat infusions have not been shown to affect LESP or the rate of transient LES relaxations.72

Nebel and Castell73 evaluated the LES response to ingestion of fat and protein meals with equivalent caloric value in healthy individuals and found that fatty meals decreased LES pressure significantly compared with protein meals, which increased LESP. Becker et al74 studied esophageal acid exposure after high- and low-fat meals and found that the fat content was not significantly associated with esophageal pH abnormalities. In a study75 of 20 healthy individuals in the supine position, those who consumed high-fat meals had significantly increased acid exposure compared with the low-fat group, but this study also found that acid exposure increased in patients who ingested a greater volume. Other randomized trials have found no difference comparing high- and low-fat meals with respect to LESP, transient LES relaxations,76 number of reflux episodes, or esophageal exposure to acid.77 There is conflicting evidence regarding whether caloric content of foods is more important than fat content.76,78

Based on the previously mentioned trials, there is limited evidence to suggest that the fat content of meals affects GERD outcomes. In fact, a recent review114 on this subject concluded that present evidence does not support any recommendations for patients with GERD to limit fat in their diets.

MINT

Peppermint and spearmint are plant extracts that are commonly used in foods and flavorings of toothpaste, mouthwash, and candy. Mint is commonly thought to relax the LES, and thus it is commonly recommended that patients with GERD avoid ingesting mint.115 We found only 1 study examining the effect of mint ingestion on GERD. Bulat et al79 conducted a randomized double-blind placebo-controlled trial in which the LES tone of healthy volunteers was measured in response to spearmint, and they found no difference in symptoms, sphincter pressure, or reflux episodes with ingestion of spearmint. There were no studies published on the effect of cessation of mint intake on GERD symptoms.

LATE-EVENING MEAL

Postprandial reflux is common in patients with GERD.116 Two studies that evaluated the effect of the timing of the evening meal on 24-hour intragastric acidity in healthy volunteers showed different effects on nocturnal pH. A study84 of early (6 PM) vs late (9 PM) dinner demonstrated lower intragastric pH (median pH, 1.39 vs 1.67; P<.001) in the later meal setting, but only between midnight and 7 AM. The second study85 in 10 healthy patients showed that nocturnal and 24-hour integrated intragastric acidity were unaffected by changes in the timing of the evening meal. In the only study in patients with GERD that examined the effect of late-evening meals, Orr and Harnish86 measured esophageal pH and symptoms in 20 patients during a late-evening meal on one night and a meal before 7 PM on another night. There was no difference between the 2 nights in terms of acid exposure, number of reflux episodes, and mean reflux episode duration.86 The evidence to routinely recommend avoidance of late-evening meals in patients with GERD remains incomplete.

RECUMBENT POSITION AND HOB ELEVATION

Counseling patients regarding HOB elevation is based on the theory that stomach contents containing acid will more likely reflux into the esophagus while patients are lying flat. Stanciu and Bennett80 compared the effect of different body positions (sitting, lying, and elevated HOB) in 63 patients with GERD symptoms using pH monitoring and showed that compared with patients who slept flat, patients who slept with an elevated HOB (using 28-cm blocks) had significantly fewer reflux episodes, shorter reflux episodes, faster acid clearing, and fewer reflux symptoms. Hamilton et al94 conducted a randomized clinical trial comparing sleeping on a wedge, sleep with HOB elevation, and sleeping in the horizontal position and found that sleeping on a wedge was associated with significantly less esophageal acid exposure compared with sleeping in the horizontal position. Sleeping with HOB elevation also showed improved acid exposure, but this difference was not statistically significant.94 In another randomized controlled trial95 of HOB elevation for 2 weeks in patients with reflux symptoms treated with proton pump inhibitors and cisapride, HOB elevation was not associated with a difference in symptoms or antacid use. The HOB elevation, therefore, seems to be an effective measure to improve the symptoms and physiologic variables in some patients with GERD.

RIGHT LATERAL DECUBITUS POSITION

Several studies have shown that reflux is increased in patients in the right lateral decubitus position. The reason for this phenomenon is not completely clear, but it may be related to increased transient LES relaxations in the right position, or possibly that the gastroesophageal junction lies above the level of gastric acid in the left lateral position.113 Specifically, total reflux time, average acid clearance, and LES relaxations are significantly prolonged in patients lying on their right side compared with the left lateral decubitus position.8183 Despite evidence that the right lateral decubitus position can aggravate reflux, the practical aspects of this lifestyle modification make it a challenge to implement in patients with GERD.

Despite articles in the literature emphasizing the insufficient evidence to support an association between lifestyle and dietary behaviors and GERD,113,117 such interventions continue to be recommended as first-line therapy.1,118 Gastroesophageal reflux disease is a chronic disease that affects health-related quality of life.119 The results of this evidence-based approach suggest that although there is physiologic evidence that smoking, alcohol, chocolate, or fatty or citrus food intake may adversely affect symptoms or esophageal pH, there is little evidence that cessation of these agents will improve GERD variables. Elevations in the HOB, left lateral decubitus positioning, and weight loss have been associated with improvement in GERD variables in case-control studies. Larger prospective controlled trials are warranted to conclusively recommend dietary and lifestyle modifications in the treatment of GERD.

Correspondence: Lauren B. Gerson, MD, MSc, Division of Gastroenterology and Hepatology, Stanford University Medical Center, Room A149, Stanford, CA 94305-5202 (lgerson@stanford.edu).

Accepted for Publication: November 7, 2005.

Author Contributions: Dr Gerson had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.

Financial Disclosure: None.

Funding/Support: This study was supported by a Research Scholar Award from the American Gastroenterological Association (Dr Gerson).

Role of the Sponsor: The American Gastroenterological Association was not involved in the design of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.

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PubMed Link to Article
Frigg  APeterli  RPeters  TAckermann  CTondelli  P Reduction in co-morbidities 4 years after laparoscopic adjustable gastric banding. Obes Surg 2004;14216- 223
PubMed Link to Article
Perry  YCourcoulas  APFernando  HCBuenaventura  POMcCaughan  JSLuketich  JD Laparoscopic Roux-en-Y gastric bypass for recalcitrant gastroesophageal reflux disease in morbidly obese patients. JSLS 2004;819- 23
PubMed
Raftopoulos  IAwais  OCourcoulas  APLuketich  JD Laparoscopic gastric bypass after antireflux surgery for the treatment of gastroesophageal reflux in morbidly obese patients: initial experience. Obes Surg 2004;141373- 1380
PubMed Link to Article
Melissas  JChristodoulakis  MSpyridakis  M  et al.  Disorders associated with clinically severe obesity: significant improvement after surgical weight reduction. South Med J 1998;911143- 1148
PubMed Link to Article
Meining  AClassen  M The role of diet and lifestyle measures in the pathogenesis and treatment of gastroesophageal reflux disease. Am J Gastroenterol 2000;952692- 2697
PubMed Link to Article
Penagini  R Fat and gastro-oesophageal reflux disease. Eur J Gastroenterol Hepatol 2000;121343- 1345
PubMed Link to Article
Feldman  MFriedman  LSSleisenger  MH Sleisenger & Fordtran's Gastrointestinal and Liver Disease: Pathophysiology, Diagnosis, Management. 7th ed. Philadelphia, Pa WB Saunders Co2002;
Johnson  LFDemeester  TR Twenty-four–hour pH monitoring of the distal esophagus: a quantitative measure of gastroesophageal reflux. Am J Gastroenterol 1974;62325- 332
PubMed
Holtmann  GAdam  BLiebregts  T The patient with gastro-oesophageal reflux disease: lifestyle advice and medication. Aliment Pharmacol Ther 2004;20 ((suppl 8)) 24- 27
PubMed Link to Article
Kitchin  LICastell  DO Rationale and efficacy of conservative therapy for gastroesophageal reflux disease. Arch Intern Med 1991;151448- 454
PubMed Link to Article
Gerson  LBUllah  NHastie  TTriadafilopoulos  GGoldstein  M Patient-derived health state utilities for gastroesophageal reflux disease. Am J Gastroenterol 2005;100524- 533
PubMed Link to Article

Figures

Tables

Table Graphic Jump LocationTable 2. Summary of Physiologic Evidence*
Table Graphic Jump LocationTable 3. Summary of Lifestyle Intervention or Cessation Trials*

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