- Who and how many
- 1,090 consecutive new patients at the offices of 83 upper cervical chiropractors.
- What was measured
- Neck disability, low back disability (Oswestry), 0 to 10 pain ratings for the neck, headache, mid back and low back, satisfaction, and any new or worse symptom within 24 hours of a visit. Measured at the start and after about two weeks: an average of 4.5 visits and 2.4 corrections over 17 days.
- What was found
- Neck pain and disability, headache, mid-back pain, and low back pain and disability all improved significantly, with an average satisfaction of 9.1 out of 10. About 31% of patients had a short-lived reaction (a new or worse symptom within 24 hours), and 5.1% rated it intense. No serious adverse events were reported.
- Limits
- No control group and about two weeks of follow-up. The authors say randomized studies are needed before risks and benefits can be weighed definitively.