Aging clinical and experimental research · 2026
Frailty and geriatric complications in older patients with IBD: a nationwide hospital claims database study across Japan.
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Shimizu Akio, Horiuchi Akira, Tomata Yasutake, Togashi Shintaro, Horiuchi Ichitaro, Mori Naoharu, Momosaki Ryo
Аннотация
BACKGROUND: Older patients with inflammatory bowel disease (IBD) often have multimorbidity and functional vulnerability, which increases the risk of in-hospital complications. This study examined whether frailty at admission is associated with hospital-associated geriatric complications in this population.
METHODS: This retrospective cohort study was conducted using a nationwide hospital-based claims database in Japan. Patients aged ≥ 60 years hospitalized with ulcerative colitis or Crohn's disease between February 2014 and September 2025 were identified. Frailty was assessed using the Hospital Frailty Risk Score (HFRS ≥ 5). The primary outcome was hospital-associated complications in older people (HAC-OP), which is a composite of functional decline, incontinence, delirium, pressure injury, and falls/fractures. The risk ratios (RRs) and 95% confidence intervals (CIs) were estimated using modified Poisson regression.
RESULTS: Among 3,905 hospitalizations, 1,220 (31.2%) patients were classified as frail. Overall, 6.7% of hospitalizations were complicated by at least one HAC-OP, with a higher incidence in patients with frailty than in non-frail patients (10.7% vs. 4.8%). Frailty was associated with HAC-OP (adjusted RR 1.74, 95% CI 1.36-2.21), functional decline (adjusted RR 1.54, 95% CI 1.12-2.11), and delirium (adjusted RR 2.50, 95% CI 1.66-3.76). Results were robust in sensitivity analyses using multiple imputation, additional adjustment for length of stay.
CONCLUSIONS: In hospitalized older patients with IBD, frailty at admission was associated with hospital-associated geriatric complications, particularly delirium and functional decline. The HFRS may be a useful tool for identifying patients at higher risk, and future studies should evaluate whether frailty-targeted interventions can reduce these complications.
METHODS: This retrospective cohort study was conducted using a nationwide hospital-based claims database in Japan. Patients aged ≥ 60 years hospitalized with ulcerative colitis or Crohn's disease between February 2014 and September 2025 were identified. Frailty was assessed using the Hospital Frailty Risk Score (HFRS ≥ 5). The primary outcome was hospital-associated complications in older people (HAC-OP), which is a composite of functional decline, incontinence, delirium, pressure injury, and falls/fractures. The risk ratios (RRs) and 95% confidence intervals (CIs) were estimated using modified Poisson regression.
RESULTS: Among 3,905 hospitalizations, 1,220 (31.2%) patients were classified as frail. Overall, 6.7% of hospitalizations were complicated by at least one HAC-OP, with a higher incidence in patients with frailty than in non-frail patients (10.7% vs. 4.8%). Frailty was associated with HAC-OP (adjusted RR 1.74, 95% CI 1.36-2.21), functional decline (adjusted RR 1.54, 95% CI 1.12-2.11), and delirium (adjusted RR 2.50, 95% CI 1.66-3.76). Results were robust in sensitivity analyses using multiple imputation, additional adjustment for length of stay.
CONCLUSIONS: In hospitalized older patients with IBD, frailty at admission was associated with hospital-associated geriatric complications, particularly delirium and functional decline. The HFRS may be a useful tool for identifying patients at higher risk, and future studies should evaluate whether frailty-targeted interventions can reduce these complications.