Lupus & antiphospholipid syndrome

Systemic Lupus Erythematosus Risk Probability Index: ready for routine use? Results from a Chinese cohort

Lupus Sci MedPublished Diagnostic accuracy study

Authors' conclusion

SLERPI performed well in patients with SLE, particularly for the earlier diagnosis of SLE.

Study context

Population
Chinese cohort of patients with SLE and without SLE (controls)352 SLE, 385 controls
Comparison
Systemic Lupus Erythematosus Risk Probability Index (SLERPI) vs ACR-1997, SLICC-2012 and European League Against Rheumatism (EULAR)/ACR-2019 classification criteria
Outcome
Classification performance for SLE

Performance

As reported in the abstract

Test or modelSensitivitySpecificity
SLERPI98.3% (95% CI 96.3% to 99.4%)89.4% (95% CI 85.8% to 92.2%)

SLERPI

Sensitivity98.3% (95% CI 96.3% to 99.4%)
Specificity89.4% (95% CI 85.8% to 92.2%)

Further findings

OutcomeSLERPI
Performance after excluding pSS and UCTD from controls
Specificity94.3% (95% CI 91.0% to 96.6%)
Accuracy96.5% (95% CI 95.0% to 97.9%)

Performance after excluding primary Sjogren's syndrome (pSS) and undifferentiated connective tissue disease (UCTD) from controls

Both outperformed the EULAR/ACR-2019 criteria

pSS and UCTD controls meeting criteria

Significantly more pSS and UCTD patients met SLERPI than other classification criteria

Time to SLERPI classification vs clinical diagnosis

Same
261
Earlier
23
Later
9

Time to SLERPI classification vs EULAR/ACR-2019

Same
280
Earlier
8
Later
1

Original publication

Systemic Lupus Erythematosus Risk Probability Index: ready for routine use? Results from a Chinese cohort. Lupus Sci Med. Published 11 September 2023. doi:10.1136/lupus-2023-000988

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