Table 2 |
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Potential indicators of patellofemoral and tibiofemoral joint OA considered in the current study |
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Domain |
Indicator |
Source |
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Risk factors |
Age; sex |
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1st degree relative with arthritis; previous menisectomy; contralateral TKR |
In-clinic face-to-face interview |
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Body mass index |
In-clinic measurement |
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Clinical hand OA |
In-clinic self-complete questionnaire + physical examination |
|
|
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|
Clinical history/symptoms |
Time since problem onset; gradual onset; problem started following injury; bilateral knee pain; incident pain; duration of morning stiffness; inactivity gelling; reported swelling in past month; reported dramatic swelling ever; locking; giving way |
In-clinic face-to-face interview |
|
|
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Pain days in last six months‡; pain, stiffness, aching on most days in the past month; current pain intensity (0 to 10 NRS)‡; significant interference with daily activities in last six months‡; |
In-clinic self-complete questionnaire |
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|
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Whole leg pain; pain walking on a flat surface†; stiffness on waking†; difficulty descending stairs† |
Prior postal self-complete questionnaire¶ |
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|
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Physical signs |
Intercondylar gap in standing; intermalleolar gap in standing; PFJ glide/compression test; presence and severity of palpable knee effusion; fixed flexion deformity; bony enlargement; mediolateral instability; isometric knee extensor strength; isometric knee flexor strength; coarse crepitus; knee flexion ROM; TF joint line tenderness; multiple local tender points§; timed single-leg standing balance |
In-clinic physical examination |
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‡ Items from Chronic Pain Grade; † Items from Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) LK3.0, dichotomised at moderate or worse; § four or more from medial femoral condyle, medial TF joint line, lateral femoral condyle, lateral TF joint line, prepatellar, infrapatellar, pes anserinus Completed a median of 53 days prior to research assessment clinic attendance NRS, numerical rating scale; OA, osteoarthritis; PFJ, patellofemoral joint; ROM, range of movement; TF, tibiofemoral; TKR, total knee replacement |
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Peat et al. Arthritis Research & Therapy 2012 14:R63 doi:10.1186/ar3779 |
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