A Review on Methods of Risk Adjustment and their Use in Integrated Healthcare Systems.
BACKGROUND
Effective risk adjustment is an aspect that is more and more given weight on the background of competitive health insurance systems and vital healthcare systems. The objective of this review was to obtain an overview of existing models of risk adjustment as well as on crucial weights in risk adjustment. Moreover, the predictive performance of selected methods in international healthcare systems should be analysed.


METHODS
A comprehensive, systematic literature review on methods of risk adjustment was conducted in terms of an encompassing, interdisciplinary examination of the related disciplines.


RESULTS
In general, several distinctions can be made: in terms of risk horizons, in terms of risk factors or in terms of the combination of indicators included. Within these, another differentiation by three levels seems reasonable: methods based on mortality risks, methods based on morbidity risks as well as those based on information on (self-reported) health status.


CONCLUSIONS
After the final examination of different methods of risk adjustment it was shown that the methodology used to adjust risks varies. The models differ greatly in terms of their included morbidity indicators. The findings of this review can be used in the evaluation of integrated healthcare delivery systems and can be integrated into quality- and patient-oriented reimbursement of care providers in the design of healthcare contracts.
IGM Institute Health Economics and Healthcare Management, Hochschule Neubrandenburg, Neubrandenburg, Germany.
Christin
C
Juhnke
IGM Institute Health Economics and Healthcare Management, Hochschule Neubrandenburg, Neubrandenburg, Germany; Institute of Epidemiology, Social Medicine and Health System Research, Hannover Medical School, Hannover, Germany.
Susanne
S
Bethge
IGM Institute Health Economics and Healthcare Management, Hochschule Neubrandenburg, Neubrandenburg, Germany.
Axel C
AC
Mühlbacher
Evaluation; Integrated Care; Risk Adjustment