Related factors of postoperative half-year care utilization for health status and recovery in older adults with hip fracture: A retrospective study of Osaka National Health Insurance Data.

Aim: The aim of this study was to investigate the relationship between preoperative patient factors and postoperative half-year health care utilization reflecting recovery, common complications, comorbidities, and significant health concerns, identifying strong risk and protective factors.

Methods: This retrospective cohort study utilized linear, quantile, and ordinal regressions to analyze Osaka National Health Insurance data from 26 606 elderly patients who underwent hip fracture surgery between 2012 and 2018.

Results: The key factors associated with multiple postoperative care utilizations (P < 0.001) included: 1 Compared with men, women were strongly negatively correlated with postoperative length of stay (LOS) at q90, diabetes prescriptions or drip injections, while showing strong positive associations with postoperative antihypertensive, antiosteoporosis, and antidementia prescriptions. 2 Age has a strong negative correlation with antiosteoporosis or diabetes prescriptions but strongly positive associations with indwelling urinary catheters or drip injections. 3 The preoperative 1-year LOS correlated positively with the postoperative LOS or indwelling urinary catheters, and the strongest associations were observed at q25 with the postoperative LOS. It was significantly and negatively associated with antihypertensive or antidementia prescriptions. 4 Many preoperative care utilizations were positive factors, and some were strong factors at q25 of the LOS.

Conclusions: Nuanced relationships between the female sex; preoperative LOS; antidementia, antiosteoporosis, antihypertensive and constipation prescriptions; indwelling catheters, and postoperative LOS were elucidated. These are key risks during shorter postoperative LOS, while male subgroups are at a higher risk during longer LOS duration. Patients with extended preoperative diabetes prescriptions or drip injections are at high risk of multiple postoperative care. Geriatr Gerontol Int 2025; ••: ••-••.