Impacts of cost-sharing rate increment on the expenditure of outpatient care among older adults: quasi-experimental study of cost-sharing reform in Japan
Taro Kusama e outros, 2026 · BMC Health Services Research
Increasing the health insurance coinsurance rate from 10% to 20% for higher-income older Japanese adults reduced monthly outpatient expenditures by 7%.
Estimativa · monthly total outpatient care expenditure, relative ratio
0,930 [0,920; 0,950]
relative ratio
p: < 0.001
- Desenho
- Série temporal interrompida. Controlled interrupted time-series analysis (ITSA) using log-gamma GEE models
- População
- Adults aged 75 and older in the Latter-Stage Elderly Healthcare System across several prefectures in Japan, 2021–2023
- Amostra
- 126.474 · individuals (22,013 intervention, 104,461 control)
Onde está o número
Results > Controlled interrupted time series analysis; Table 2, row 'Overall outpatient care: Change due to the increase in CIR to 20%', column 'Whole period model RR (95% CI)'
As shown in Table 2, the increased cost-sharing was associated with a significant decrease in total expenditure for overall outpatient care (RR = 0.93 [95% CI = 0.92, 0.95]).
Contexto
What changed: Japan increased the cost-sharing rate from 10% to 20% on October 1, 2022, for older adults aged 75+ with taxable income of 280,000 JPY or higher. Comparison: Controlled interrupted time series comparing affected individuals against lower-income older adults whose coinsurance stayed at 10%. Limits: Data came from health insurance societies in selected prefectures rather than the complete national registry; the post-reform observation window was limited to one year.
Caminho no grafo
- FamíliaTransferências, subsídios e financiamento
- TipoSeguro público
- EixoSaúde
MAGI só cita evidência deste instrumento
Lugares do estudo
- Japan · País · JP
- Licença
- CC-BY
- Revisão
- Extraído por máquina, não revisadoExtraído por: gemini-3.8-flash, 2026-10-23