Health economic analysis of inpatient prostate cancer treatment in Austrian hospitals

BACKGROUND: Prostate cancer (PrC) is the fourth most prevalent type of cancer worldwide. Its high incidence and 5-year survival rates contributing to high inpatient care costs make it an important public health issue. In Austria, surgery has been the most common inpatient procedure for PrC, despite clinical recommendations not clearly indicating its benefits over alternatives. No health economic comparison of these procedures has considered the period after treatment yet. We bridge this gap by analysing the health economic impact of treatment pathways. METHODS: We use a large administrative dataset of all inpatient PrC patients in Austria who received either only surgery or only radiation therapy from 2005-2014 (n = 34,286). To assess the health economic impact, we used diagnosis-related-group (DRG) points and length of stay (LOS). Monthly DRG points and LOS for each patient ±12-months around the index procedure were analysed using the difference in difference (DID) method. We controlled for age, and physical comorbidity burden using Charlson Comorbidity Index (CCI) scores. RESULTS: Looking at unadjusted averages, patients in the surgery group were significantly younger and had a lower CCI compared to the radiation group. Consequently, the surgery group had lower nominal average DRG points and LOS. However, when controlling for age and CCI, we found that radiation treatment was less resource intensive. A DID estimation found a shorter average LOS and lower DRG points for the radiation group compared to surgery for the 12 months post index. CONCLUSIONS: We found significant additional costs and LOS times for surgical pathways following risk adjustment in Austria. This implies a potential excess burden of ∼4,400 hospitalisation days and ∼4 million DRG points (€4.8m) a year for the healthcare system during the observed period. Considering international evidence on higher patient burden in surgical pathways, these findings may call for clinical reconsiderations of PrC care. KEY MESSAGES: • Patient characteristics of different inpatient treatment pathways for PrC in Austria were very heterogenous. • Health economic outcomes in the post treatment period for PrC inpatient treatment were significantly better for radiation treatment compared to surgery.