Abstract

Introduction: Gastroparesis (GP) and functional dyspepsia (FD) present with overlapping upper gastrointestinal (GI) symptoms, such as: nausea, vomiting, early satiety, postprandial fullness, epigastric pain, and bloating. Other gastrointestinal motility disorders may be concurrent in patients with GP. The goal of study was to compare the presence of GI symptoms and other motility disorders in patients with GP and FD. Methods: A retrospective cohort study was performed on IBM Explorys (1999-2022), which contains de-identified healthcare information from more than 64 million patients across the United States. Adult patients who have completed gastric emptying study were selected, and subsequently divided into GP and FD cohorts. GP cohort consists of patients with a diagnosis of gastroparesis, with exclusion criteria: cyclical vomiting syndrome, psychoactive substance abuse, eating disorder, factitious disorder, malignant tumor of esophagus and stomach, neoplasm of abdomen, gastric or intestinal obstruction, IBD, adhesion of intestine, carcinomatosis, perforation of intestine, Roux-en-Y gastrojejunostomy, and gastrectomy. FD cohort was similarly constructed with additional exclusion criteria: gastroparesis, gastrointestinal ulcer, brain neoplasm and pancreatitis. The presence of GERD, IBS, GI symptoms and common GI medications were collected. Odds ratios (ORs) with 95% confidence interval were used to compare the cohorts. Results: GP and FD cohort consisted of 17,570 and 60,230 patients respectively (Table). There was a higher prevalence of concurrent motility disorders in patients with GP than FD, including GERD and IBS (65.1 vs 50.9%, 18.6 vs 13.3%). Patients with GP tend to present with more upper and lower GI symptoms than FD, including nausea (65.1 vs 46.3%), vomiting (53.0 vs 33.3%), epigastric pain (36.9 vs 27.2%), heartburn (8.6 vs 7.5%), diarrhea (34.6 vs 23.3%) and constipation (37.2 vs 21.8%) (P< 0.0001) (Figure). However, there was no difference in terms of early satiety and bloating when comparing the two groups. Acid reducing medications, anti-nausea medications and prokinetic agents were more commonly prescribed for patients with GP than FD, including proton pump inhibitors (PPIs), H2 receptor antagonists (H2RA), Metoclopramides and Ondansetron (p< 0.0001). Conclusion: GP is associated with more concurrent GI symptoms and motility disorders compared with FD. Acid reducing medications, anti-nausea and prokinetic medications are more commonly prescribed for patients with GP.Figure 1.: Comparison of GI symptoms between gastroparesis and functional dyspepsia Table 1. - Comparison of GI motility disorders, symptoms and medications between gastroparesis and functional dyspepsia GP (N=17570) % FD (N=60230) % OR P GI diseases GERD 11430 65.1% 30650 50.9% 1.74-1.86 < 0.0001 IBS 3260 18.6% 8030 13.3% 1.42-1.55 < 0.0001 Symptoms Upper GI symptoms Nausea 11430 65.1% 27910 46.3% 2.08-2.23 < 0.0001 Vomiting 9310 53.0% 20060 33.3% 2.18-2.34 < 0.0001 Early satiety 1660 9.5% 5780 9.6% 0.93-1.04 0.5556 Epigastric pain 6490 36.9% 16380 27.2% 1.51-1.62 < 0.0001 Heartburn 1510 8.6% 4500 7.5% 1.10-1.24 < 0.0001 Lower GI symptoms Diarrhea 6070 34.6% 14050 23.3% 1.67-1.80 < 0.0001 Constipation 6540 37.2% 13110 21.8% 2.06-2.21 < 0.0001 Bloating 60 0.3% 170 0.3% 0.90-1.63 0.2039 Medications PPI 13680 77.9% 35430 58.8% 2.37-2.56 < 0.0001 H2RA 7710 43.9% 18310 30.4% 1.73-1.85 < 0.0001 Metoclopramide 8630 49.1% 12490 20.7% 3.56-3.82 < 0.0001 Ondansetron 12570 71.5% 31330 52.0% 2.24-2.41 < 0.0001

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