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Sex differences in outcomes of disease-modifying treatments for multiple sclerosis: A systematic review

Multiple Sclerosis and Related Disorders, Volume 12, February 2017, Pages 23–28

Abstract

Background

Multiple sclerosis (MS) is a chronic immune mediated demyelinating disease of the central nervous system that exhibits sexual dimorphism and may benefit from sex-specific treatment. To investigate a potential influence of sex on immunomodulatory therapeutic effects in patients with MS, we performed a comprehensive analysis of published studies examining sex differences in the effects of disease-modifying treatments (DMTs) for MS.

Methods

PubMed, Cochrane Library, and Web of Science databases were searched for clinical studies involving patients with MS who were undergoing DMTs. Studies were included if they investigated sex differences in DMT outcomes.

Results

Fourteen studies with 11,425 participants were included; 11 of these studies were randomized controlled trials, and 3 were cohort studies. Although the studies did occasionally show sex-specific differences for some clinical outcomes in patients with MS who received DMTs, the limitation of subgroup analysis design made it difficult to draw conclusions on the direction or the extent of the sex-based effect.

Conclusion

No clear sex-based differences in response to DMTs have been documented to date. More studies will be needed to better elucidate the presence of sex differences on the DMT effects.

Highlights

  • The current studies have, on occasion, shown sex-specific differences in DMTs effects.
  • This systematic review showed strengths and limitations of the current studies.
  • No clear sex-based differences in response to DMTs have been documented to date.
  • More studies are needed to better elucidate the sex differences in DMTs effects.

Keywords: Sex difference, Disease-modifying treatment, Multiple sclerosis.

Footnotes

Department of Neurology, The Third Affiliated Hospital of Sun Yet-senYet-sen University, Guangzhou, China

Corresponding author.

1 These authors contributed equally to this work.