The association between multiple sclerosis and migraine: A meta-analysis.

BACKGROUND

Multiple sclerosis (MS) is a chronic progressive condition marked by the deterioration of myelin and impairment of neurological function. The global prevalence of MS is approximately 2.2 million. Migraines are common in MS patients, with inconclusive data on their relationship. Our systematic review aimed to assess the prevalence and odds of migraine in pwMS and investigate the potential factors that may influence these associations.

METHOD

Through an extensive search and meticulous study selection, we identified pertinent literature investigating the occurrence and odds of migraines among pwMS. Additionally, we explored the comparative risk of migraines in MS patients compared to healthy controls. Data were extracted, including publication details, diagnostic criteria, and migraine prevalence in MS patients.

RESULTS

A total of 35 studies were included, involving 279,620 pwMS and 279,603 healthy controls. The overall prevalence of migraine in pwMS was 0.24 (95% CI: 0.21-0.28). Subgroup analyses and meta-regression were conducted to investigate the potential impact of various factors on the relationship between migraine and MS. These factors included age, duration of MS, study design, and the Expanded Disability Status Scale (EDSS), migraine diagnosis method, study design, publication year of the study, country and continent of the study population. The results of these analyses revealed no significant influence of these factors on the relationship between migraine and MS. The meta-analysis indicated that pwMS had significantly increased odds of having migraine compared to healthy controls (OR = 1.96, 95% CI: 1.20-3.20). Sensitivity analyses supported the robustness of the findings.

CONCLUSIONS

Our study highlights that approximately 24% of pwMS experience migraine. The method of diagnosis significantly affects the reported prevalence, with questionnaires yielding higher rates. Furthermore, pwMS have a 1.96-fold increased odds of having migraine compared to healthy individuals. These findings emphasize the importance of further research and interventions to address the significant burden of migraine in the MS population.