Table 2. Comparison between variables in relation to the presence of sarcopenia in OA and RA.
| OA (n = 75) | RA (n = 82) | |||||
|---|---|---|---|---|---|---|
| Sarcopenic (n = 22) |
Non- sarcopenic | p-value | Sarcopenic (n = 14) |
Non- sarcopenic | p-value | |
| Age | 71.6 | 67.7 | 0.087^ | 69.4 | 59.4 | 0.008*^ |
| Sex (%female) | 64% (n = 14) | 58% (n = 31) | 0.798 | 64% (n = 9) | 75% (n = 51) | 0.509 |
| BMI | 34.4 | 29.3 | <0.001^* | 32.5 | 26.5 | <0.001*^ |
| Body fat (%) | 44.7 | 36.3 | <0.001^* | 43.4 | 35.5 | 0.004*^ |
| CRP-levels | 5.1 | 4.4 | 0.048^* | 14.3 | 7.7 | 0.003^* |
| Steroids | 64% (n = 9) | 38% (n = 26) | 0.073 | |||
| Fatigue (MAF) | 21.4 | 20.9 | 0.869 | 24.2 | 24.2 | 0.983 |
| MAF, severity | 8.8 | 9.1 | 0.820^ | 10.1 | 10.6 | 0.786^ |
| MAF, distress | 3.2 | 3.0 | 0.847^ | 4.4 | 3.5 | 0.373^ |
| MAF, DL | 3.2 | 2.9 | 0.629^ | 3.1 | 3.4 | 0.786^ |
| MAF, timing | 11.9 | 11.2 | 0.268^ | 12.0 | 12.7 | 0.747^ |
| Fatigue (VAS) | 39.1 | 39.2 | 0.848^ | 44.5 | 43.1 | 0.848^ |
| WOMAC | 32.0 | 29.9 | 0.727^ | 29.8 | 25.6 | 0.286^ |
| HAQ-DI | 1.1 | 0.8 | 0.081^ | 1.1 | 1.0 | 0.464^ |
| Pedometer | 3522 | 4730 | 0.065^ | 3921 | 4843 | 0.382^ |
| Physical Function | ||||||
| TUG (sec) | 8.7 | 7.4 | 0.036^* | 8.2 | 6.6 | 0.090^ |
| STS (number) | 10.1 | 10.0 | 0.703^ | 10.00 | 12.2 | 0.054^ |
| Walking speed (m/s) | 1.2 | 1.4 | 0.005* | 1.3 | 1.5 | 0.041* |
| Grip Strength (kg) | 21.7 | 27.9 | 0.014^* | 14.9 | 18.8 | 0.148^ |
OA = osteoarthritis, RA = Rheumatoid Arthritis, n = number, BMI = Body Mass Index, CRP = C-reactive protein, MAF = Multidimensional Assessment of Fatigue, DL = Daily Living, VAS = Visual Analog Scale, WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index, HAQ-DI = Health Assessment Questionnaire Disability Index, TUG = Timed Up and Go, STS = Sit To Stand, WS = Walking Speed, GS = Grip Strength. Data are mean (SD) unless otherwise stated.
* significant difference between sarcopenic and non-sarcopenic = p < .05.
^ Mann-Whitney U- test