- Design
- Multicentre retrospective cohort, 17 sites
- Population
- Children with skin-limited discoid lupus erythematosus
- Primary outcome
- Time to SLE diagnosis (ACR criteria ≥4)
- Effect
- 1-year progression 14.4% (95% CI 9.6–18.9); ANA positivity HR 3.71
A retrospective cohort across 17 sites studied children with discoid lupus confined to the skin, following them to a diagnosis of systemic lupus by American College of Rheumatology criteria. It was published in June 2026.
By one year, 14.4% (95% CI 9.6–18.9) had progressed to SLE. A positive antinuclear antibody at baseline was the strongest predictor (HR 3.71), followed by older age (HR 1.11 per year); antiphospholipid antibodies and cytopenias also predicted progression. The resulting SLE was mostly mild: 9% met only mucocutaneous and laboratory criteria and 3% developed other organ involvement.
The practical message is baseline testing and closer follow-up in the first year for children whose results put them at higher risk. Whether earlier treatment changes the course is not known. The design is retrospective with missing data, so the precise rates are uncertain.
- Check ANA, a full blood count and antiphospholipid antibodies when discoid lupus is diagnosed in a child.
- Consider closer review in the first year for ANA-positive children, especially older ones.
- Involve paediatric rheumatology when ANA is positive or cytopenias are found.
- Reassure families that progression was usually mild, with serious organ disease uncommon.
Why it matters
It turns a vague worry about progression into a test at diagnosis and a defined window for closer review.
Don't overread it
Retrospective with missing data — it does not show that earlier treatment prevents progression.
The statistics, in plain English
A hazard ratio of 3.71 means ANA-positive children progressed at almost four times the rate of ANA-negative children. The 14.4% figure has an interval of about 10–19%, and a retrospective design with missing data may misstate it.
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