“Systematic reviews of controlled clinical studies of treatments used by chiropractors have found no evidence that chiropractic manipulation is effective, with the possible exception of treatment for back pain.[8] A 2011 critical evaluation of 45 systematic reviews concluded that the data included in the study “fail[ed] to demonstrate convincingly that spinal manipulation is an effective intervention for any condition.”[10] Spinal manipulation may be cost-effective for sub-acute or chronic low back pain, but the results for acute low back pain were insufficient.[11] No compelling evidence exists to indicate that maintenance chiropractic care adequately prevents symptoms or diseases.[12]”
Enough facilities offer fully certified doctors and technicians on the same level you would find in any other medical facilities.
Yes, there are. But there also some clinics that have chiropractors in training who aren’t as qualified to do chiropractic as experienced chiropractors. I know a place where they use chiropractors who are still in training and developing experience, and lots of people say to avoid it and go to more professional chiropractors.