Chiropractors: Are They Legit?

Episode Summary

Executive Summary: This episode of Science Versus examines the legitimacy of chiropractic care, tracing its origins to D.D. Palmer's mystical theories of subluxations. While low-quality evidence suggests spinal manipulation may help with back and neck pain, there is no scientific support for its use in children or for treating non-musculoskeletal conditions. The episode highlights risks, including rare but serious complications like stroke or death from neck manipulation, and notes that many chiropractors still adhere to unproven subluxation theory.

Main Topics: Origins and Theory of Chiropractic (Priority: 5/5): Chiropractic was founded by D.D. Palmer in the late 1800s, based on the idea that spinal subluxations block a mystical nerve energy, causing 95% of diseases. This theory lacks scientific evidence. Effectiveness for Back and Neck Pain (Priority: 5/5): Reviews of low-quality trials suggest spinal manipulation may reduce neck and back pain, sometimes more than medication. However, the mechanism is unclear and may involve placebo effects. Chiropractic for Children (Priority: 4/5): There is no good evidence supporting chiropractic for pediatric conditions like asthma, colic, or bedwetting. Australia has banned spinal manipulation in children under two due to lack of evidence and potential risks. Risks and Side Effects (Priority: 4/5): Common side effects include increased pain, headaches, and dizziness. Rare but serious risks include arterial tears, stroke, and death, particularly from neck manipulation. Subluxation Controversy (Priority: 4/5): The concept of subluxations as misaligned bones causing disease is widely criticized as pseudoscience. Many chiropractors still believe in it, but some acknowledge the lack of evidence. Placebo and Patient Satisfaction (Priority: 3/5): Even if chiropractic works via placebo, patients like Bill and Chris Sorrey value pain relief regardless of the mechanism. This raises ethical questions about unproven treatments.

Key Arguments: Chiropractic originated from D.D. Palmer's mystical belief that spinal subluxations block nerve energy and cause disease, a theory unsupported by modern science. Low-quality evidence indicates spinal manipulation may help with neck and back pain, but the mechanism is unknown and may involve placebo. There is no good evidence that chiropractic is effective for children for any condition, and Australia has banned it for those under two. Rare but serious risks of neck manipulation include arterial tears, stroke, and death, though the exact incidence is debated. Many chiropractors still adhere to subluxation theory, which critics call pseudoscience, but some within the profession acknowledge the lack of evidence. Patient satisfaction, as with the Sorrey family, often persists even when the treatment's efficacy is questioned, highlighting the role of placebo.

Data Points: Percentage of American adults who visited a chiropractor in 2022: 1 in 10 - Mostly for pain, according to the National Institutes of Health. Percentage of diseases D.D. Palmer attributed to subluxations: 95% - He believed subluxations caused most diseases, a claim without evidence. Number of trials reviewed by Anita Gross on neck pain and spinal manipulation: Almost 40 - Most were low-quality, but some showed benefit over medication. Percentage of Canadian chiropractors who believe subluxation is key to health: Almost 1 in 5 - From a study of several hundred Canadian chiropractors. Percentage of chiropractors who agreed there is a lack of evidence for most treatments they use: 1 in 4 - From a survey of over a thousand chiropractors. Estimated incidence of death from neck manipulation: 1 in every few million manipulations - Some estimates vary; others consider it more common.

Pivotal Quotes: "The subluxations simply do not exist physically. They don't exist at all? They don't exist at all. It's simply just telling you a complete fib." — Marcello Costa: Professor of neurophysiology, dismissing the core chiropractic concept of subluxations. "It's a bit like religion. You've got to filter out the bullshit." — Bill Sorrey: Katie's father, reflecting on his family's long-term chiropractic use despite acknowledging unproven claims. "There is no good evidence to explicitly support the effectiveness of spinal manipulation or mobilization for any condition in pediatric populations." — Anita Gross (paraphrased from international review): Conclusion of a major review on chiropractic for children.

Implications: Listeners should approach chiropractic with caution: it may offer relief for back/neck pain, but its theoretical basis is unscientific, and risks exist. For children, evidence is lacking, and parents should avoid it. The episode underscores the need for more rigorous research and informed consent.