Christina Xia, Lee Pfaff, Navreet Kaur, Neil Suryadevara, Hesham Masoud
Abstract 1122-000200: Chiropractor manipulation leading to bilateral vertebral artery dissection and acute ischemic stroke
Source is an abstract of a case study that mentions the “1 in 20,000” estimate with no citation. As a case report, this conference proceeding cannot provide an estimate.
It is estimated that 1 in 20,000 spinal manipulation results in vertebral artery aneurysm/dissection.