Lupus & antiphospholipid syndrome

Peripartum maternal outcomes in individuals with systemic lupus erythematosus in a real-world electronic health record cohort

Semin Arthritis RheumPublished Retrospective cohort study

Main finding · Peripartum infection (mixed effects model, adjusted for race)Result — go to the resultOdds ratio 6.18 95 % CI 2.73–13.98

Authors' conclusion

Individuals with SLE have increased rates of blood transfusions, longer hospital stays, and more frequent infections compared to control individuals in the peripartum period. We observed a postpartum flare rate of 32 %, and antimalarial use was associated with lower flare rate.

Study context

Population
Deliveries in a de-identified electronic health record (EHR) cohort of individuals with and without systemic lupus erythematosus (SLE)
Exposure
SLE deliveries vs control deliveries without autoimmune disease
  • SLEn = 185 deliveries to 142 individuals
  • Controlsn = 468 deliveries to 241 control individualsreference
Outcome
Peripartum maternal outcomes: maternal infections, blood transfusions, hospital LOS and SLE flares
Methodological detailsde-identified EHR cohort, mixed effects models, chart review
  • De-identified EHR cohort
  • Mixed effects models
  • Chart review

Main finding

As reported in the abstract

Peripartum infection (mixed effects model, adjusted for race) · up to 6 weeks postpartum

Odds ratio

6.18

95 % CI 2.73–13.98

P < 0.01

SLEvs Controls
OR 6.18 (95 % CI 2.73–13.98); P < 0.01
Cesarean section associated with peripartum infection, OR
5.00 (95 % CI 2.16 - 11.57, p < 0.01)
Age at delivery associated with peripartum infection, OR
0.92 (95 % CI 0.86 - 0.99, p = 0.03)

Observational data: associations, not effects.

Further findings

Hospital LOS

P < 0.001

OutcomeOR (95 % CI)P value
Blood transfusion (mixed effects model, adjusted for Cesarean section and age at delivery)Adjusted for Cesarean section and age at delivery9.05 (3.24–25.32)P < 0.01
Blood transfusion (mixed effects model, adjusted for Cesarean section and age at delivery) — Black race associated with transfusion, OR
6.64 (95 % CI 1.47 - 30.02, p = 0.01)
Postpartum SLE flare rate (SELENA Flare Index) · up to 6 months postpartum
32 %

Flare rate by postpartum antimalarial use (SLE subgroup)

Antimalarial use in the postpartum period associated with lower flare rate (43 % vs. 63 %, p = 0.04)

Original publication

Peripartum maternal outcomes in individuals with systemic lupus erythematosus in a real-world electronic health record cohort. Semin Arthritis Rheum. Published 30 November 2024. doi:10.1016/j.semarthrit.2024.152603

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