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Pregnancy outcomes in women with idiopathic inflammatory myopathy, before and after diagnosis—a population-based study

Rheumatology (Oxford, England), 2020-09, Vol.59 (9), p.2572-2580 [Peer Reviewed Journal]

The Author(s) 2020. Published by Oxford University Press on behalf of the British Society for Rheumatology. 2020 ;The Author(s) 2020. Published by Oxford University Press on behalf of the British Society for Rheumatology. ;ISSN: 1462-0324 ;ISSN: 1462-0332 ;EISSN: 1462-0332 ;DOI: 10.1093/rheumatology/kez666 ;PMID: 31998957

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Title:
Pregnancy outcomes in women with idiopathic inflammatory myopathy, before and after diagnosis—a population-based study
Author: Che, Weng Ian ; Hellgren, Karin ; Stephansson, Olof ; Lundberg, Ingrid E ; Holmqvist, Marie
Subjects: Adult ; Cesarean Section - statistics & numerical data ; Clinical Science ; Female ; Humans ; Infant, Low Birth Weight ; Infant, Newborn ; Medicin och hälsovetenskap ; Myositis - diagnosis ; Myositis - epidemiology ; Pregnancy ; Pregnancy Complications - diagnosis ; Pregnancy Complications - epidemiology ; Pregnancy Outcome - epidemiology ; Premature Birth - epidemiology ; Prognosis ; Registries - statistics & numerical data ; Risk Assessment - methods ; Risk Assessment - statistics & numerical data ; Sweden - epidemiology
Is Part Of: Rheumatology (Oxford, England), 2020-09, Vol.59 (9), p.2572-2580
Description: Abstract Objectives To examine pregnancy outcomes among births to women with idiopathic inflammatory myopathy (IIM) in relation to time of IIM diagnosis using population-based data. Methods This study used Swedish nationwide registers to identify all singleton births that occurred between 1973 and 2016 among women diagnosed with IIM between 1998 and 2016 and among women unexposed to IIM. We classified births according to the IIM status of the mother at time of delivery: post-IIM (n = 68), 1–3 years pre-IIM (n = 23), >3 years pre-IIM (n = 710) and unexposed to IIM (n = 4101). Multivariate regression models were used to estimate relative risks of adverse pregnancy outcomes in post-IIM births and pre-IIM births separately, in comparison with their non-IIM comparators. Results We found that post-IIM births had increased risks of caesarean section [adjusted relative risk (aRR) = 1.98; 95% CI: 1.08, 3.64], preterm birth (aRR = 3.35; 95% CI: 1.28, 8.73) and low birth weight (aRR = 5.69; 95% CI: 1.84, 17.55) compared with non-IIM comparators. We also noticed higher frequencies of caesarean section and instrumental delivery in 1–3 years pre-IIM births than in the non-IIM comparators. Conclusion Women who gave birth after IIM diagnosis had higher risks of caesarean section, preterm birth and low birth weight. These results further underline the importance of special care and close monitoring of women with IIM. Higher frequencies of caesarean section and instrumental delivery in pre-IIM births highlight the need for future research on the influence of subclinical features of IIM on pregnancy outcomes.
Publisher: England: Oxford University Press
Language: English
Identifier: ISSN: 1462-0324
ISSN: 1462-0332
EISSN: 1462-0332
DOI: 10.1093/rheumatology/kez666
PMID: 31998957
Source: Oxford Open (Open Access)
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Pregnancy outcomes in women with idiopathic inflammatory myopathy, before and after diagnosis—a population-based study

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