Predictors and dynamics of postpartum relapses in women with multiple sclerosis

  • Stella E Hughes
  • , Tim Spelman
  • , Orla M Gray
  • , Cavit Boz
  • , Maria Trojano
  • , Alessandra Lugaresi
  • , Guillermo Izquierdo
  • , Pierre Duquette
  • , Marc Girard
  • , Francois Grand'Maison
  • , Pierre Grammond
  • , Celia Oreja-Guevara
  • , Raymond Hupperts
  • , Roberto Bergamaschi
  • , Giorgio Giuliani
  • , Jeannette Lechner-Scott
  • , Michael Barnett
  • , Maria Edite Rio
  • , Vincent van Pesch
  • , Maria Pia Amato
  • Gerardo Iuliano, Mark Slee, Freek Verheul, Edgardo Cristiano, Ricardo Fernández-Bolaños, Dieter Poehlau, Maria Laura Saladino, Norma Deri, Jose Cabrera-Gomez, Norbert Vella, Joseph Herbert, Eli Skromne, Aldo Savino, Cameron Shaw, Fraser Moore, Steve Vucic, Tatjana Petkovska-Boskova, Gavin McDonnell, Stanley Hawkins, Frank Kee, Helmut Butzkueven*, MSBase Study Group
*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

BACKGROUND: Several studies have shown that pregnancy reduces multiple sclerosis (MS) relapses, which increase in the early postpartum period. Postpartum relapse risk has been predicted by pre-pregnancy disease activity in some studies.

OBJECTIVE: To re-examine effect of pregnancy on relapses using the large international MSBase Registry, examining predictors of early postpartum relapse.

METHODS: An observational case-control study was performed including pregnancies post-MS onset. Annualised relapse rate (ARR) and median Expanded Disability Status Scale (EDSS) scores were compared for the 24 months pre-conception, pregnancy and 24 months postpartum periods. Clustered logistic regression was used to investigate predictors of early postpartum relapses.

RESULTS: The study included 893 pregnancies in 674 females with MS. ARR (standard error) pre-pregnancy was 0.32 (0.02), which fell to 0.13 (0.03) in the third trimester and rose to 0.61 (0.06) in the first three months postpartum. Median EDSS remained unchanged. Pre-conception ARR and disease-modifying treatment (DMT) predicted early postpartum relapse in a multivariable model.

CONCLUSION: Results confirm a favourable effect on relapses as pregnancy proceeds, and an early postpartum peak. Pre-conception DMT exposure and low ARR were independently protective against postpartum relapse. This novel finding could provide clinicians with a strategy to minimise postpartum relapse risk in women with MS planning pregnancy.

Original languageEnglish
Pages (from-to)739-46
Number of pages8
JournalMultiple Sclerosis Journal
Volume20
Issue number6
DOIs
Publication statusPublished - May 2014

Keywords

  • Adult
  • Aged
  • Case-Control Studies
  • Disability Evaluation
  • Female
  • Humans
  • Middle Aged
  • Multiple Sclerosis, Relapsing-Remitting
  • Postpartum Period
  • Pregnancy
  • Risk

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