Spondyloarthritis & psoriatic arthritis
Validity of clinical psoriatic arthritis diagnoses made by rheumatologists in the Swedish National Patient Register
Authors' conclusion
The validity of rheumatologist-made, clinical ICD-10 diagnoses for PsA in the Swedish NPR is good, with PPVs of 69-82% for CASPAR fulfilment and 86% for meeting any established PsA classification criteria.
Study context
- Population
- Patients with ≥1 outpatient visit to one of five rheumatology or internal medicine departments in Sweden in 2013–2015 with a main ICD-10 diagnosis of psoriatic arthritis (PsA) (L40.5, M07.0-M07.3) in the Swedish National Patient Register (NPR)80 cases/site
- Participants
- 400 patients
- Comparison
- CASPAR vs Moll and Wright vs Vasey and Espinoza vs modified ESSG
- Outcome
- PPV of a main ICD-10 PsA diagnosis for fulfilment of PsA classification criteria
Methodological detailsstructured medical record review, random selection (80 cases/site), five departments (three university/two county)
- Structured medical record review
- Random selection (80 cases/site)
- Five departments (three university/two county)
Performance
As reported in the abstract
PPV for fulfilment of PsA classification criteria
| Test or model | Value | PPV |
|---|---|---|
| CASPAR | 69% | 69% |
| Moll and Wright | 51% | 51% |
| Vasey and Espinoza | 76% | 76% |
| Modified ESSG | 64% | 64% |
Value
CASPAR69%
Moll and Wright51%
Vasey and Espinoza76%
Modified ESSG64%
PPV
CASPAR69%
Moll and Wright51%
Vasey and Espinoza76%
Modified ESSG64%
- Fulfilled at least one of the four PsA classification criteria
- 343 (86%)
Further findings
- CASPAR fulfilment, subset with available RF and peripheral X-ray status (n = 227)
- 82%
PsA diagnoses judged clearly incorrect by medical record reviewers
- Clearly incorrect diagnoses, of 400
- 6.5%
Original publication
Validity of clinical psoriatic arthritis diagnoses made by rheumatologists in the Swedish National Patient Register. Scand J Rheumatol. Published 6 June 2022. doi:10.
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