A multi‐level strategy for a long lasting reduction in unnecessary laboratory testing: A multicenter before and after study in a teaching hospital network

BACKGROUND: Reducing unnecessary laboratory blood testing in the hospital setting represents a challenge to improve the adequacy of healthcare and a tricky task for teaching hospitals. Our hospital network actively participates in the Choosing Wisely Campaign and is engaged in avoiding unnecessary low value interventions and investigations. We aimed to study whether a multi‐level approach combining educational and web‐system based interventions, could be effective in reducing laboratory testing and related costs. METHODS: Multicenter, proof of concept, prospective, observational, before and after study, in a network of public hospitals in Switzerland. All patients admitted between 1 January 2015 and 31 December 2017 were analyzed. A multi‐level strategy based on online continuous monitor benchmarking and educational support was applied in the internal medicine services. The primary outcome was a significant reduction in the number of laboratory tests per patient and per day during the hospital stay. Secondary outcomes were reduction in the blood sample volume taken per patient and per day in laboratory costs. RESULTS: Over the 36 months of the study, 33 309 admissions were analyzed. A significant reduction of laboratory tests per patient and per day of hospitalisation was found:–11%, P‐value<0.001; –6%, P‐value <0.001. The mean monthly blood volume, per patient and per day of hospital stay and laboratory costs per patient was also significantly reduced: –7%, P‐value<0.05; –3%, P‐value<0.01, and –17%, P‐value<0.01, respectively. CONCLUSIONS: The obtained reduction in the number of laboratory tests, blood volume withdrawn and related costs, support the idea that an open web‐based system, involving all health care providers, coupled with educational interventions, can be helpful in generating awareness of prescriber habits and to catalyze changes in their behaviour. The peer pressure related to the unmasked benchmarking process did probably play a determinant role.