Table 6.

Confusion Matrix of Physician and Survey-based Diagnoses of Nociplastic Pain (Fibromyalgia ACR score: WPI≥7 and SSS≥5, or WPI≥4 and SSS≥9).

Physician
Positive Diagnosis
Physician
Negative Diagnosis
Questionnaire
Positive Diagnosis
22 20 PPV=52.4%
Questionnaire
Negative Diagnosis
3 44 NPV=93.6%
Sensitivity=88.0% Specificity=68.8%

Physician-assigned diagnoses were used as the reference standard.

RMMJ Rambam Maimonides Medical Journal Rambam Health Care Campus 2026; 17(3): e0020. ISSN: 2076-9172
Published online 2026 July 31. doi: 10.5041/RMMJ.10580