de Frémont GM, Costedoat-Chalumeau N, Lazaro E, Belkhir R, Guettrot-Imbert G, Morel N, Nocturne G, Molto A, Goulenok T, Diot E, Perard L, Ferreira-Maldent N, Le Besnerais M, Limal N, Martis N, Abisror N, Debouverie O, Richez C, Sobanski V, Maurier F, Sauvetre G, Levesque H, Timsit MA, Tieulié N, Orquevaux P, Bienvenu B, Mahevas M, Papo T, Lartigau-Roussin C, Chauvet E, Berthoux E, Sarrot-Reynauld F, Raffray L, Couderc M, Silva NM, Jourde-Chiche N, Belhomme N, Thomas T, Poindron V, Queyrel-Moranne V, Delforge J, Le Ray C, Pannier E, Mariette X, Le Guern V, and Seror R
Background: Adverse pregnancy outcomes in women with primary Sjögren's syndrome have only been evaluated retrospectively using heterogeneous methods and with contradictory results. We aimed to describe adverse pregnancy, delivery, and birth outcome risks in pregnant women with primary Sjögren's syndrome compared with those of a matched general population in France, and to identify factors predictive of disease flares or adverse pregnancy outcomes., Methods: We conducted a multicentre, prospective, cohort study in France using the GR2 (Groupe de Recherche sur la Grossesse et les Maladies Rares) registry. Women from the GR2 study were eligible if they had conceived before March, 2021, had primary Sjögren's syndrome according to the American College of Rheumatology and European Alliance of Associations for Rheumatology (EULAR) 2016 classification criteria, and had an ongoing pregnancy at 12 weeks of gestation. In women who entered in the registry with pregnancies before 18 weeks of gestation, we sought to identify factors associated with primary Sjögren's syndrome flare (≥3-point increase in EULAR Sjögren's Syndrome Disease Activity Index [ESSDAI] score) or adverse pregnancy outcomes (fetal or neonatal death, placental insufficiency leading to a preterm delivery [<37 weeks of gestation], or small-for-gestational-age birthweight). A matched controlled study compared adverse pregnancy, delivery, and birth outcome rates between pregnant women with primary Sjögren's syndrome from the GR2 registry and matched controls from the general population included in the last French perinatal survey (Enquête Nationale Périnatale 2016)., Findings: 1944 pregnancies were identified in the GR2 cohort, of which 106 pregnancies in 96 women with primary Sjögren's syndrome were included in this analysis. The median age at pregnancy onset was 33 years (IQR 31-36). 87 (83%) of 105 pregnancies (with ethnicity data) were in White women, 18 (17%) were in Black women; 92 (90%) of 102 had previous systemic activity (ESSDAI score of ≥1; data missing in four pregnancies), and 48 (45%) of 106 had systemic activity at inclusion. Of 93 pregnancies included at week 18 of gestation or earlier, primary Sjögren's syndrome flares occurred in 12 (13%). No baseline parameters were associated with primary Sjögren's syndrome flare. Four twin pregnancies and one medical termination were excluded from the adverse pregnancy outcome analysis; of the remaining 88, adverse pregnancy outcomes occurred in six (7%). Among pregnancies in women with data for antiphospholipid antibodies (n=55), antiphospholipid antibody positivity was more frequent among pregnancies with adverse outcomes (two [50%] of four pregnancies) compared with those without adverse outcomes (two [4%] of 51 pregnancies; p=0·023). Anti-RNP antibody positivity was also more frequent among pregnancies with adverse outcomes than those without, although this was not statistically significant. In the matched controlled study, adverse pregnancy outcomes occurred in nine (9%) of 105 pregnancies in women with primary Sjögren's syndrome and 28 (7%) of the 420 matched control pregnancies; adverse pregnancy outcomes were not significantly associated with primary Sjögren's syndrome (odds ratio 1·31, 95% CI 0·53-2·98; p=0·52)., Interpretation: Pregnancies in women with primary Sjögren's syndrome had very good prognoses for mothers and fetuses, with no overall increase in adverse pregnancy outcome risk compared with the general population. Women with antiphospholipid antibodies or anti-RNP antibodies require close monitoring, because these factors might be associated with a higher risk of adverse pregnancy outcomes., Funding: Lupus France, Association des Sclérodermiques de France, Association Gougerot Sjögren, Association Francophone Contre la Polychondrite Chronique Atrophiante, AFM-Telethon, Société Nationale Française de Médecine Interne, Société Française de Rhumatologie, Cochin Hospital, French Health Ministry, Fondation for Research in Rheumatology, Association Prix Véronique Roualet, Union Chimique Belge., Competing Interests: Declaration of interests NC-C reports an unrestricted research grant from UCB to her institution. GN reports grants from la Société Française de Rhumatologie and Arthritis Foundation; consulting fees from Biogen, Pfizer, Novartis, Lilly, and Amgen; support for attending meetings and travel from Amgen; and is an advisory board member for Boehringer Ingelheim. AM reports an unrestricted research grant from Pfizer to her institution; consulting fees from Janssen and Gilead; and honoraria for presentations or speaker bureaus from AbbVie, Bristol Myers Squibb, Biogen, Pfizer, UCB, and Lilly; support from AbbVie, Janssen, Bristol Myers Squibb, and Pfizer for attending meetings or travel; and is an advisory board member for Janssen and UCB. CR reports consulting fees from Novartis and UCB. MM received grants from GSK and received support for travel and attending meetings from Novartis and LFB. LR reports support for attending meetings from Novartis and Otsuka. XM reports consulting fees from AstraZeneca, Bristol Myers Squibb, Galapagos, GlaxoSmithKline, Novartis, and Pfizer. VLG reports honoraria for presentations or speaker bureaus from Bristol Myers Squibb; consulting fees from Novartis; and support from AstraZeneca–MedImmune for attending meetings and travel. RS reports consulting fees from GlaxoSmithKline, Bristol Myers Squibb, Boehringer Ingelheim, and Janssen; honoraria for presentations or speaker bureaus from GlaxoSmithKline, Bristol Myers Squibb, Fresenius Kabi, Boehringer Ingelheim, Janssen, Pfizer, and Roche; and support for attending meetings and travel from Amgen and GlaxoSmithKline. All other authors declare no competing interests., (Copyright © 2023 Elsevier Ltd. All rights reserved.)