Relapse occurrence in women with multiple sclerosis during pregnancy in the new treatment era.

Abstract:

OBJECTIVE:To determine the rate of relapse occurrence during pregnancy and postpartum. METHODS:In a cross-sectional study using the national multiple sclerosis (MS) registry, pregnant women with relapsing MS were identified. Data on demographics, clinical characteristics, and disease-modifying therapies (DMTs), including washout periods, were collected. Timings and durations of relapses were extracted. A multivariate logistic regression was used to assess the relationship between relapses and prior use of different DMTs. RESULTS:Completed data were available for 99 pregnancies (87 patients). Mean age and mean age at onset were 31.8 ± 5 and 24.4 ± 5.6 years, respectively, while the mean disease duration was 7.4 ± 4.6 years. Most pregnancies (89.9%) occurred in patients who were on DMTs in the year preceding pregnancy with a mean treatment duration of 63.4 ± 29 months. The rates of occurrence of relapses during pregnancy and postpartum were 17.2% and 13.7%, respectively. Most of the relapses occurred during the first (n = 6) and third (n = 7) trimesters. Rate of relapse was highest among patients receiving natalizumab and fingolimod before pregnancy. A longer washout period was significantly associated with relapse occurrence. CONCLUSION:The relapse occurrence during pregnancy is higher than the previously published rates. The use of high-efficacy therapies with long washout periods before conception was associated with an increased risk of relapses during pregnancy. Postpartum relapse occurrence was similar to that in previous reports.

journal_name

Neurology

journal_title

Neurology

authors

Alroughani R,Alowayesh MS,Ahmed SF,Behbehani R,Al-Hashel J

doi

10.1212/WNL.0000000000005065

subject

Has Abstract

pub_date

2018-03-06 00:00:00

pages

e840-e846

issue

10

eissn

0028-3878

issn

1526-632X

pii

WNL.0000000000005065

journal_volume

90

pub_type

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