Symptomatic Reactions, Clinical Outcomes and Patient Satisfaction Associated with
Upper Cervical Chiropractic Care: A Prospective, Multicenter, Cohort Study
Kirk Eriksen, Roderic P Rochester, and Eric L Hurwitz
Chiropractic Health Institute, PC
2500 Flowers Chapel Road
Dothan, AL 36305, USA.
BACKGROUND: Observational studies have previously shown that adverse events following manipulation to the neck and/or back are relatively common, although these reactions tend to be mild in intensity and self-limiting. However, no prospective study has examined the incidence of adverse reactions following spinal adjustments using upper cervical techniques, and the impact of this care on clinical outcomes.
METHODS: Consecutive new patients from the offices of 83 chiropractors were recruited for this practice-based study. Clinical outcome measures included:
1) Neck pain disability index (100-point scale),
2) Oswestry back pain index (100-point scale),
3) 11-point numerical rating scale (NRS) for neck, headache, midback, and low back pain,
4) treatment satisfaction, and
5) Symptomatic Reactions (SR).
Data were collected at baseline, and after approximately 2 weeks of care. A patient reaching sub-clinical status for pain and disability was defined as a follow-up score <3 NRS and <10%, respectively. A SR is defined as a new complaint not present at baseline or a worsening of the presenting complaint by >30% based on an 11-point numeric rating scale occurring <24 hours after any upper cervical procedure.
RESULTS: A total of 1,090 patients completed the study having 4,920 (4.5 per patient) office visits requiring 2,653 (2.4 per patient) upper cervical adjustments over 17 days. Three hundred thirty- eight (31.0%) patients had symptomatic reactions (SRs) meeting the accepted definition. Intense SR (NRS ≥8) occurred in 56 patients (5.1%). Outcome assessments were significantly improved for neck pain and disability, headache, mid-back pain, as well as lower back pain and disability (p <0.001) following care with a high level (mean = 9.1/10) of patient satisfaction. The 83 chiropractors administered >5 million career upper cervical adjustments without a reported incidence of serious adverse event.
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