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Headache. 2019 Apr;59(4):532-542. doi: 10.1111/head.13501. Epub 2019 Mar 14.

The Impact of Spinal Manipulation on Migraine Pain and Disability: A Systematic Review and Meta-Analysis.

Author information

1
Division of Preventive Medicine, Department of Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA.
2
Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA.
3
Osher Clinic Center, Brigham and Women's Hospital, Boston, MA, USA.
4
Department of Neurology, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA.
5
Palmer College of Chiropractic, Davenport, IA, USA.
6
The Spine Institute for Quality, Davenport, IA, USA.
7
College of Nursing, Chungnam National University, Daejeon, South Korea.

Abstract

BACKGROUND:

Several small studies have suggested that spinal manipulation may be an effective treatment for reducing migraine pain and disability. We performed a systematic review and meta-analysis of published randomized clinical trials (RCTs) to evaluate the evidence regarding spinal manipulation as an alternative or integrative therapy in reducing migraine pain and disability.

METHODS:

PubMed and the Cochrane Library databases were searched for clinical trials that evaluated spinal manipulation and migraine-related outcomes through April 2017. Search terms included: migraine, spinal manipulation, manual therapy, chiropractic, and osteopathic. Meta-analytic methods were employed to estimate the effect sizes (Hedges' g) and heterogeneity (I2 ) for migraine days, pain, and disability. The methodological quality of retrieved studies was examined following the Cochrane Risk of Bias Tool.

RESULTS:

Our search identified 6 RCTs (pooled n = 677; range of n = 42-218) eligible for meta-analysis. Intervention duration ranged from 2 to 6 months; outcomes included measures of migraine days (primary outcome), migraine pain/intensity, and migraine disability. Methodological quality varied across the studies. For example, some studies received high or unclear bias scores for methodological features such as compliance, blinding, and completeness of outcome data. Due to high levels of heterogeneity when all 6 studies were included in the meta-analysis, the 1 RCT performed only among chronic migraineurs was excluded. Heterogeneity across the remaining studies was low. We observed that spinal manipulation reduced migraine days with an overall small effect size (Hedges' g = -0.35, 95% CI: -0.53, -0.16, P < .001) as well as migraine pain/intensity.

CONCLUSIONS:

Spinal manipulation may be an effective therapeutic technique to reduce migraine days and pain/intensity. However, given the limitations to studies included in this meta-analysis, we consider these results to be preliminary. Methodologically rigorous, large-scale RCTs are warranted to better inform the evidence base for spinal manipulation as a treatment for migraine.

KEYWORDS:

disability; migraine; pain; spinal manipulation

PMID:
30973196
PMCID:
PMC6461372
[Available on 2020-04-01]
DOI:
10.1111/head.13501

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