S1159 Functional Dyspepsia and Gastroparesis Is Linked to Higher Psychiatric Burden Than Irritable Bowel Syndrome: A Propensity-Matched TriNetX Study

Introduction: Although psychiatric comorbidity is recognized in functional gastrointestinal (GI) disorders, comparative data for upper-GI dysmotility (functional dyspepsia and gastroparesis; FD/GP) versus irritable bowel syndrome (IBS) are scarce Methods: We queried the TriNetX Research Network (100 health-care organizations) in May 2025. Adults ≥18 years with IBS (International Classification of Diseases-10-CM K58.x) or both FD (K30) and gastroparesis (K31.84) were identified. Index date was the first qualifying diagnosis. Six psychiatric outcomes-major depressive disorder (MDD F32), generalized anxiety disorder (GAD F41), bipolar disorder (BPD F31), schizophrenia-spectrum disorders (F20/F20-F29), obsessive-compulsive disorder (OCD F42) and post-traumatic stress disorder (PTSD F43.1) were assessed beginning 1 day post-index. 1:1 propensity-score matching was done with balanced demographics, race/ethnicity, central nervous system and gastrointestinal medication classes, and endoscopy exposure. Risk ratios (RR), absolute risk differences (ARD) and Kaplan–Meier hazard ratios (HR) were calculated. Results: After matching, 37,872 patients with FD/GP were compared to an equal number of IBS patients with excellent covariate balance. FD/GP patients experienced significantly higher rates of psychiatric disorders: MDD (38.7% vs 27.7%; RR 1.40, 95% CI 1.37–1.43), GAD (43.3% vs 37.6%; RR 1.15, 1.13–1.17), BPD (6.0% vs 4.6%; RR 1.30, 1.22–1.38), schizophrenia (3.6% vs 2.2%; RR 1.64, 1.49–1.80), PTSD (10.2% vs 6.7%), and OCD (2.9% vs 2.2%).OCD was least common among both the groups. Time-to-event analysis showed earlier psychiatric diagnosis in FD/GP, including MDD (median: 2,518 vs 5,323 days; HR 1.56) and GAD (1,785 vs 2,582 days; HR 1.23). For schizophrenia and BPD, median survival times were not reached, but hazard ratios remained elevated (HRs ≈1.3–1.7). Conclusion: Patients with FD/GP carry a substantially greater and earlier psychiatric burden compared to those with IBS, including elevated risks of PTSD and OCD. These findings support routine mental health screening and integrated behavioral care in upper GI dysmotility syndromes.