Spondyloarthritis & psoriatic arthritis

Pre-eclampsia is more common in women with active psoriatic arthritis in pregnancy: a population-based study

RMD OpenPublished Population-based cohort study

Main finding · Pre-eclampsiaResult — go to the resultRisk difference 6.1 % 95% CI 0.3–20.3

Authors' conclusion

Hypertensive disorders of pregnancy occurred more often in women with active, but not inactive PsA. We found no increased risk for preterm birth or abnormal fetal growth in women with PsA.

Study context

Population
Singleton births in women with psoriatic arthritis (PsA) with available disease activity assessment, RevNatus 2010 to 2019, Norway109 PsA cases
Participants
34 / 75 / 575,798
Exposure
Active PsA and inactive PsA in pregnancy vs population controls
  • Active PsAn = 34
  • Inactive PsAn = 75
  • Population controlsn = 575,798reference
Outcome
Pre-eclampsia, gestational hypertension, preterm birth and fetal growth by peripheral disease activity
Methodological detailsnationwide register linkage (RevNatus and Medical Birth Registry of Norway (MBRN)), population controls
  • Nationwide register linkage (RevNatus and MBRN)
  • Population controls

Main finding

Pre-eclampsia

Risk difference

6.1 %

95% CI 0.3–20.3

P = 0.036

Events by group

Active PsAvs Population controls
risk difference 6.1 % (95% CI 0.3–20.3); P = 0.036

As reported in the abstract

Observational data: associations, not effects.

Further findings

OutcomeActive PsAInactive PsAPopulation controlsRisk difference (%) (95% CI)P value
Gestational hypertensionActive PsAvs Population controls5.9%2.7%1.7%4.2 (0.0–17.4)P = 0.065
OutcomeP value
Gestational hypertensionInactive PsA vs Population controls · similar proportionsP = 0.24

Preterm birth and abnormal fetal growth

Comparable in cases and population controls

Original publication

Pre-eclampsia is more common in women with active psoriatic arthritis in pregnancy: a population-based study. RMD Open. Published 28 October 2025. doi:10.1136/rmdopen-2025-005666

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