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‘Clinical equipoise’—what an appealing concept, which has come to dominate our conversations about clinical trials in the cerebrovascular community.1 In its early years, the neurointerventional field moved forward empowered by case series and by the confidence that skilled operators using minimally invasive techniques attained better results than the alternatives—including doing nothing. The lack of personal ‘equipoise’ meant that many well-meaning practitioners thought it unnecessary and even unethical to subject their patients to randomization away from a treatment they thought was best. As was the case for neurosurgeons who promoted extracranial–intracranial bypass2 and carotid endarterectomy,3 alternatives to ‘clinical equipoise’ such as ‘community equipoise’ took shape for interventionalists. Recognizing that disparate perspectives across the community of experts could demonstrate a larger scale metric of uncertainty eased the discomfort of randomization of many practitioners by balancing their certainty against those that lacked equipoise but from the ‘other’ side. Recent trials in endovascular therapy for ischemic stroke exemplify the evidence-based medicine this concept has allowed in a community where few individual physicians had true personal equipoise.4–7
In articulating the concept of ‘community equipoise’ in 1987,8 Benjamin Freedman created a system that enabled clinical researchers to randomize their patients …
Contributors All authors contributed to the planning, research, drafting, and editing of this commentary. The manuscript was supervised and managed by DFK.
Funding This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
Competing interests None declared.
Patient consent Not required.
Provenance and peer review Commissioned; internally peer reviewed.
Data sharing statement There are no additional unpublished data from the study.
Correction notice Since this commentary was first published online the author name Alejandro A Rabinstein has been updated.