Development and validation of the Flare-OA questionnaire for measuring flare in knee and hip osteoarthritis

The Flare-OA-16 questionnaire measuring flare in knee and hip osteoarthritis in the patient perspective: scale reduction and validation using a Rasch model

“…In conclusion, we a rm the Flare-OA-16 questionnaire measures ve dimensions conceptually consolidated for are in OA (22). The present study conducted in a multicultural sample has demonstrated that the instrument achieved expectations of the Rasch model after some modi cations.…”

“…In CFA (maximum likelihood method), factors with at least two items were entered and showed good t indicators: CFI = .97; RMSEA = .05 with LLCI 90% = .047 until ULCI 90% = .068). Considering the convergent validity analysis (Table 2), the results found for the Flare-OA-16 were similar to those found for the full version (22). Coe cients were from 0.61 to 0.86 for the Flare-OA score correlated with scores for pain, symptoms, and ADL domains of the HOOS and KOOS and pain, physical activities and mental health domains of the Mini-OAKHQOL.…”

“…Reproducing what was performed on the full version (22), the psychometric properties of the resulting reduced questionnaire were documented for structure validity with a Con rmatory Factor Analysis (CFA) and convergent validity by correlation with the KOOS, HOOS and mini-OAKHQOL.…”

Recognising and managing osteoarthritis flares in primary care

“…In practice, an osteoarthritis flare can usually be recognised as an acute change in symptoms characterised by worsening pain, morning stiffness ≥20 minutes, pain related sleep disturbance, limping, swelling or effusion, increased warmth, and symptoms that affect usual activities and lead to mood changes 1819. Tools to help detect and assess flare occurrence are under development, with the recent validation of a patient-reported instrument for use in research19 and development of a physician-reported scoring tool 18.…”

“…In practice, an osteoarthritis flare can usually be recognised as an acute change in symptoms characterised by worsening pain, morning stiffness ≥20 minutes, pain related sleep disturbance, limping, swelling or effusion, increased warmth, and symptoms that affect usual activities and lead to mood changes 1819. Tools to help detect and assess flare occurrence are under development, with the recent validation of a patient-reported instrument for use in research19 and development of a physician-reported scoring tool 18. In the latter, a French general practice database study, accuracy of patient self-report for a knee osteoarthritis flare compared with physician diagnosis was very high (96.5%), suggesting that in clinical practice, healthcare professionals can be guided by people recognising their own flares 18.…”