Physiological Aging and Disease Presentation in GI and GU Systems

Gastrointestinal System

Weight loss, fatigue, and functional decline are common presenting features of GI diseases in elderly patients, instead of typical GI symptoms like abdominal pain or dyspepsia, according to the American Diabetes Association 1
Cognitive impairment, confusion, and mood disorders can be the primary manifestation of underlying GI pathology in elderly patients, rather than direct GI symptoms, as reported by the Gut Microbes journal 2
Elderly-onset Crohn's disease more commonly involves isolated colonic disease (44%) with less penetrating or perianal disease, and ulcerative colitis in elderly patients is more likely to be left-sided (40%), as found by the American Gastroenterological Association 3
Despite potentially more benign initial phenotypes, elderly-onset UC patients may have higher colectomy rates than younger patients, according to the American Gastroenterological Association 3

Elderly patients with UTIs rarely present with classic urinary symptoms; instead, they manifest with systemic and neurological changes, such as altered mental status and new-onset confusion, as reported by the European Association of Urology 4
Altered mental status and new-onset confusion are the most common presenting features of UTI in elderly patients, according to the European Association of Urology 4
Functional decline, falls, and fatigue may be the only signs of UTI without dysuria or frequency in elderly patients, as found by the European Association of Urology 4
UTI incidence rises dramatically with age: >10% of women >65 years report UTI in the past year, increasing to 30% for women >85 years, according to the European Association of Urology 4
Recurrence rates are significantly higher in elderly populations, as reported by the European Association of Urology 4

Adverse drug reactions account for >700,000 emergency visits annually in elderly patients, with GI and GU systems frequently affected, according to the American Diabetes Association 1
Polypharmacy increases risk of drug-drug interactions affecting both GI and GU function, as found by the American Gastroenterological Association 3
Malnutrition affects >50% of geriatric patients at hospital admission, often related to GI dysfunction, according to the European Society for Clinical Nutrition and Metabolism 8
Age-related changes in GI physiology impair nutrient absorption, particularly during critical illness, as reported by the European Society for Clinical Nutrition and Metabolism 8