Fibromyalgia & musculoskeletal pain

fAI-BRO: a multimodal artificial intelligence (AI) decision-support system to address diagnostic delay in fibromyalgia syndrome

RMD OpenPublished Diagnostic accuracy study

Authors' conclusion

fAI-BRO demonstrates promising diagnostic accuracy for FMS screening as a human-in-the-loop decision-support tool, with perfect inflammatory arthritis classification and high patient acceptability.

Study context

Population
Patients at the University of Bari undergoing standardised interviews in Italian
Participants
100 patients
Comparison
fAI-BRO multimodal AI system for distinguishing FM from other rheumatic and musculoskeletal diseases
  • Fibromyalgia syndrome (FMS)n = 50
  • RMD controlsn = 50reference
Outcome
Diagnostic accuracy of fAI-BRO for FMS detection on a 0-100 composite score
Methodological detailscross-sectional, proof-of-concept, zero-shot configuration, thresholds optimised post hoc via Youden's J index
  • Cross-sectional
  • Proof-of-concept
  • Zero-shot configuration
  • Thresholds optimised post hoc via Youden's J index

Performance

As reported in the abstract

FMS detection (0-100 composite score)
Test or modelAccuracySensitivitySpecificityAUC
fAI-BRO91%94% (95% CI 83.5% to 98.7%)88% (95% CI 75.7% to 95.5%)0.96

fAI-BRO

Accuracy91%
Sensitivity94% (95% CI 83.5% to 98.7%)
Specificity88% (95% CI 75.7% to 95.5%)
AUC0.96

Further findings

Classification of inflammatory arthritis (rheumatoid arthritis (RA), psoriatic arthritis (PsA), spondyloarthritis (SpA), systemic lupus erythematosus (SLE); n=36) and mechanical conditions (OA, impingement; n=8)

All correctly classified as RMD

False positives for FMS

All six false positives in DM (n=3) and PMR (n=3)
6
  • Hypothesis-generating observation

Perturbation analysis

Widespread pain descriptors the dominant classification drivers

Translation effect

Binary classification robust to the English translation effect

Patient comfort

Mean patient comfort (/5)
4.5

Processing time

Mean processing time (s)
324

Original publication

fAI-BRO: a multimodal AI decision-support system to address diagnostic delay in fibromyalgia syndrome. RMD Open. Published 13 July 2026. doi:10.1136/rmdopen-2026-006995

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