Abmd

Regarding some current studies converning ABMD products such as Impella.

"Randomized controlled trials (RCTs) are considered the gold standard approach for estimating the effects of treatments, interventions, and exposures (hereafter referred to as treatments) on outcomes. "

"In conclusion, propensity score methods allow one to transparently design and analyze observational studies. I encourage greater use of these methods in applied psychological and behavioral research."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3144483/

Wouldn't a randomized controlled study be more accurate in clinical analysis?