That is the paraphrased title of a paper by Fusco et al. (2023). The authors conduct a scientific literature evaluate of research printed between 2010 and 2020 and discover that among the many 79 articles screened:
The vast majority of publications discovered that, no matter illness space, elevated cost-sharing was related to worse adherence, persistence, or discontinuation. The combination information urged the better the magnitude of cost-sharing, the more severe the adherence. Amongst research inspecting scientific outcomes, cost-sharing was related to worse outcomes in 1 research and the remaining 3 discovered no important variations. Concerning HRU [healthcare resource utilization], higher-cost-sharing trended towards decreased outpatient and elevated inpatient utilization. The obtainable proof urged larger cost-sharing has an general impartial to unfavourable impression on whole prices. Research evaluating elimination of copays discovered both decreased or no impression in whole prices.
There are two problem with the paper (i) publication bias and (ii) value sharing measurement. With respect to the previous, are papers that present no relationship between value sharing and adherence, HRU and price much less prone to be printed? Probably. Whereas this bias doubtless would impression the purpose estimates, it appears logically and empirically very sturdy that larger value sharing reduces adherence and will increase inpatient admissions. Publication bias could also be extra influential for the opposite outcomes measured (i.e., scientific outcomes and price). The second problem is that value sharing could also be measured in numerous methods throughout research. The authors do point out that the sort and magnitude of value sharing different throughout research. Extra importantly, nonetheless, the connection between value sharing and outcomes is troublesome to estimate empirically since what one want to measure is the price sharing construction a affected person faces; when you don’t fill a drug as a result of value sharing is just too excessive, noticed copayments within the information shall be $0 however the true value sharing one faces is massive. Then again, if an individual has low value sharing, they could resolve the fill the drug and noticed value sharing (as measured in claims) can be excessive even when the profit design could be very beneficiant. Since claims information solely embrace quantities paid moderately than a affected person’s profit construction, inventive econometric options–or information that mix claims and profit design–are wanted to estimate the connection between value sharing and price in a extra rigorous method. However, by conducting a scientific literature evaluate of those research, Fusco and co-authors have offered an essential evaluate for researchers to judge these points for particular person research in additional element.