Mason, Thomas and Whittaker, William and Jones, Andrew and Sutton, Matt (2021) Did paying drugs misuse treatment providers for outcomes lead to unintended consequences for hospital admissions? Difference-in-differences analysis of a pay-for-performance scheme in England. Addiction, 116, (11), pp. 3082-3093. doi: 10.1111/add.15486.
External website: https://onlinelibrary.wiley.com/doi/10.1111/add.15...
AIMS: To estimate how a scheme to pay substance misuse treatment service providers according to treatment outcomes affected hospital admissions.
DESIGN: A controlled, quasi-experimental (difference-in-differences) observational study using negative binomial regression. Setting was hospitals in all 149 organisational areas in England for the period 2009-2010 to 2015-2016.
PARTICIPANTS: 572,545 patients admitted to hospital with a diagnosis indicating drug misuse, defined based on International Classification of Diseases 10th Revision (ICD-10) diagnosis codes (37 964 patients in 8 intervention areas and 534,581 in 141 comparison areas).
INTERVENTION AND COMPARATORS: Linkage of provider payments to recovery outcome indicators in 8 intervention organisational areas compared with all 141 comparison organisational areas in England. Outcome indicators included: abstinence from presenting substance, abstinent completion of treatment and non-re-presentation to treatment in the 12 months following completion.
MEASUREMENTS: Annual counts of hospital admissions, emergency admissions and admissions including a diagnosis indicating drugs misuse. Covariates included age, sex, ethnic origin and deprivation.
FINDINGS: For 37,245 patients in the intervention areas, annual emergency admissions were 1.073 times higher during the operation of the scheme compared with non-intervention areas. There were an estimated additional 3 352 emergency admissions in intervention areas during the scheme. These findings were robust to a range of secondary analyses.
CONCLUSION: A programme in England from 2012 to 2014 to pay substance misuse treatment service providers according to treatment outcomes appeared to increase emergency hospital admissions.
J Health care, prevention, harm reduction and rehabilitation > Treatment and maintenance > Treatment factors
J Health care, prevention, harm reduction and rehabilitation > Treatment and maintenance > Provider / worker / staff attitude toward treatment
J Health care, prevention, harm reduction and rehabilitation > Health care economics
VA Geographic area > Europe > United Kingdom > England
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