Lupus & antiphospholipid syndrome

Systemic lupus erythematosus incidence and prevalence in a large population-based study in northeastern Italy

Rheumatology (Oxford)Published Retrospective population-based study

Authors' conclusion

Over the last decade, SLE prevalence has increased, while incidence has stably declined.

Study context

Population
Residents of Veneto Region, northeastern Italy (4.9 million people), 2012–201,092 incident cases
Participants
4,283 residents
Exposure
Females vs Males
Outcome
Incidence and prevalence of SLE
Follow-up
2012-20
Methodological detailsadministrative health database, standardized rates by age and sex
  • Administrative health database
  • Standardized rates by age and sex

Main finding

As reported in the abstract

SLE standardized point prevalence and incidence
Standardized point prevalence at start of study period, per 100 000 residents
63.5 (95% CI 61.2, 65.8)
Standardized point prevalence at end of study period, per 100 000 residents
70.6 (95% CI 68.3, 73.0)
Annual increment in prevalence (P < 0.0001)
1.14%
SLE incidence per 100 000 person-years
2.8 (95% CI 2.6, 2.9)
Annual decline in incidence (P < 0.0001)
7.3%

Observational data: associations, not effects.

Further findings

OutcomeIRR (95% CI)P value
SLE incidence, femalevs male · 2013-2020Female-to-male incidence rate ratio5.00 (4.25–5.87)P < 0.0001

Age at diagnosis

SLE incidence, female vs male · 2013-2020

Peak incidence among women aged 30-39 years

Age at diagnosis

Women significantly younger than men at diagnosis

Highest SLE prevalence

Highest prevalence observed in females aged 60-69 years

Original publication

Systemic lupus erythematosus incidence and prevalence in a large population-based study in northeastern Italy. Rheumatology (Oxford). Published 10 December 2022. doi:10.1093/rheumatology/keac685

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