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Peptic Ulcer Risk Factors: Who Is Most Vulnerable?

Populations at Highest Risk for Peptic Ulcer Disease

Peptic ulcers (gastric/duodenal) result from H. pylori infection, NSAIDs, or both, modulated by host factors. Risk is multiplicative, not merely additive.

Top Risk Factors (Ranked by Population Attributable Risk)

  1. H. pylori Infection: Causes 90% duodenal, 70–80% gastric ulcers. Prevalence: ~35% US adults; higher in immigrants, low SES, older cohorts. Eradication reduces recurrence from 60–80% to <10%.
  2. NSAID/ASA Use: Dose/duration dependent. RR 4–5× for ulcer complications. COX-2 selective + PPI reduces but doesn't eliminate risk.
  3. Age ≥65: Mucosal defense ↓ (mucus, bicarbonate, blood flow, prostaglandins); comorbidities, polypharmacy. Duodenal ulcer incidence peaks 50–70; gastric ulcer rises with age.
  4. Prior Ulcer History: Recurrence 50%+ at 1 yr if H. pylori not eradicated / NSAID continued.
  5. Anticoagulants / Antiplatelets (warfarin, DOACs, clopidogrel): Don't cause ulcers but increase bleeding severity if ulcer present. Combined with NSAID → synergistic risk.
  6. Corticosteroids: Alone modest risk; combined with NSAID → 15× ulcer risk.
  7. Smoking: Delays healing, increases recurrence, reduces prostaglandin synthesis. Current smokers 2× risk vs. never.
  8. Alcohol (>2 drinks/day): Mucosal irritant; synergizes with NSAIDs/H. pylori.
  9. Comorbidities: COPD, CKD, cirrhosis, transplant (immunosuppression), critical illness (stress ulcer prophylaxis indicated in ICU).

Protective Factors

  • H. pylori eradication
  • PPI co-therapy with NSAIDs (reduces ulcer risk 70–90%)
  • COX-2 selective NSAID (celecoxib) + PPI for highest GI risk
  • Smoking cessation
  • Moderate alcohol

Clinical Pearls

  • Test-and-treat for H. pylori before chronic NSAID initiation in high-risk patients.
  • Stress ulcer prophylaxis (PPI/H2RA) only in ICU with risk factors (mechanical ventilation >48h, coagulopathy, sepsis)—not general wards.
  • "Stress" (psychological) alone does not cause ulcers—but drives behaviors (smoking, alcohol, NSAID use) that do.

Risk stratification guides prophylaxis intensity. The elderly on multiple ulcerogenic meds with H. pylori are the highest-risk cohort.

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