The differential impact of Diagnosis-Related Groups (DRG) on hierarchical hospitals: an interrupted time series analysis on health expenditure structure.

BMC Health Serv Res · 2026 · PMC13123101 · PMID 41857761

Europe PMC DOI

hedged sentences

0.0010

closest p · 0.0× alpha

0.1450

boldest claim

The sentences

a decreasing trendP < 0.001actually significant

Trends in hospitalization cost structure before and after the DRG reform in tertiary hospitals The proportion of drug costs in tertiary hospitals showed a decreasing trend before the DRG reform ( β 1 =-0.15, P < 0.001).

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did not reach statistical significanceP = 0.145not close (p > 0.1)

Hospital heterogeneity of trends before and after DRG reform Although the differences between hospitals for most indicators did not reach statistical significance (e.g.: average of hospitalization costs Δβ =-69.85, P = 0.145), the consistent direction of the coefficients supports the overall cost-control role of DRG.

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