AI Article Synopsis
- The study aimed to determine effective cutoff scores for the Psoriatic Arthritis Impact of Disease questionnaire (PsAID12) based on disease activity measures in patients with PsA.
- Using data from the ReFlaP study, researchers analyzed scores to define disease states such as remission and varying impact levels, employing statistical methods to establish these cutoffs.
- Results indicated that the PsAID12 score had high diagnostic performance against established benchmarks, but further validation and expert consensus are needed to confirm the proposed cutoffs for clinical use.
Article Abstract
Objectives: To explore thresholds for the Psoriatic Arthritis (PsA) Impact of Disease questionnaire (PsAID12) score against disease activity measures in an observational setting, in patients with PsA.
Methods: The baseline data from the ReFlaP observational, prospective, multicentre and international study was used (NCT03119805). Cutoffs for PsAID12 were determined against disease activity scores, defining disease impact states (ie remission, low impact, moderate impact and high impact). Statistics used to assess the optimal cutoff point included the Youden's index and the 75th percentile method, with external anchors (i.e. DAPSA, VDLA/MDA and single questions for both patients and physicians) serving as gold standards. The diagnostic performance of these cutoffs was evaluated using Receiver Operating Characteristic (ROC) curve analyses.
Results: A total of 410 patients were analyzed. Mean (standard deviation, SD) PsAID12 score was 3.4 (SD 2.5). The prevalence of remission varied between 12.4% and 36.1%, while low disease activity ranged from 37.8% to 59.8%. PsAID12 performed well against external anchors, with high areas under the ROC curves ranging from 0.75-0.94. Using the DAPSA as external anchor, the proposed PsAID12 cutoffs were <1.7 for remission, ≥1.7 to ≤ 3.1 for low impact, >3.1 to < 4.8 for moderate impact, and ≥4.8 for high impact. Compared with composite scores, patient and physician opinions performed less stringent.
Conclusion: This study established cutoffs for PsAID12 in a clinical practice observational population, corresponding to remission and varying levels of disease impact. However, these proposed cutoffs need further validation, and an expert consensus is essential to confirm the most accurate thresholds for future use.
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Article Synopsis
- The study aimed to determine effective cutoff scores for the Psoriatic Arthritis Impact of Disease questionnaire (PsAID12) based on disease activity measures in patients with PsA.
- Using data from the ReFlaP study, researchers analyzed scores to define disease states such as remission and varying impact levels, employing statistical methods to establish these cutoffs.
- Results indicated that the PsAID12 score had high diagnostic performance against established benchmarks, but further validation and expert consensus are needed to confirm the proposed cutoffs for clinical use.
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