Healthcare resource utilization and clinical outcomes associated with acute care and inpatient rehabilitation of stroke patients in Japan.

Objective: To investigate healthcare resource utilization and changes in functional status in stroke patients during hospitalization in an acute hospital and a rehabilitation hospital.

Design: Retrospective cohort study.

Setting: One acute and one rehabilitation hospital in Japan.

Participants: Patients who were admitted to the acute hospital due to stroke onset and then transferred to the rehabilitation hospital (n = 263, 56% male, age 70 ± 12 years).

Main outcome measures: Hospitalization costs and functional independence measure (FIM) were evaluated according to stroke subtype and severity of disability at discharge from the acute hospital.

Results: Median (IQR) costs at the acute hospital were dependent on the length of stay (LOS) and implementation of neurosurgery, which resulted in higher costs in subarachnoid hemorrhage [$52 413 ($49 166-$72 606) vs $14 129 ($11 169-$19 459) in cerebral infarction; and vs $15 035 ($10 920-$21 864) in intracerebral hemorrhage]. The costs at the rehabilitation hospital were dependent on LOS, and higher in patients with moderate disability than in those with mild disability [$30 026 ($18 419-$39 911) vs $18 052 ($10 631-$24 384)], while those with severe disability spent $25 476 ($13 340-$43 032). Patients with moderate disability gained the most benefits during hospitalization in the rehabilitation hospital, with a median (IQR) total FIM gain of 16 (5-24) points, compared with a modest improvement in patients with mild (6, 2-14) or severe disability (0, 0-5).

Conclusions: The costs for in-hospital stroke care were substantial and the improvement in functional status varied by severity of disability. Our findings would be valuable to organize efficient post-acute stroke care.