Table 1 Comparison of psychophysical responses among knee OA patients (n = 35) and pain-free controls (n = 39)
|  | Knee OA (n = 35) | Controls (n = 39) |
|---|---|---|
Variables of Interest Assessed During the QST Session | ||
Current Clinical Pain (0–100) | 34.3 ± 26.2** | 0 ± 0 |
Anxiety during QST (0–100) | 23.1 ± 20.7 ** | 5.5 ± 7.1 |
Mechanical and Cold Pressor Responses | ||
PPTh (KPa)- Trapezius | 275.1 ± 142.3* | 346.4 ± 130.0 |
PPTh (KPa)- Thumb | 227.5 ± 91.0** | 339.9 ± 94.6 |
PPTh (KPa)- Knee | 315.9 ± 158.0** | 510.2 ± 188.6 |
Cuff Pain Threshold (mmHg) | 129.3 ± 51.4* | 168.6 ± 76.1 |
Cold Pain Tolerance (sec) | 29.7 ± 30.8** | 72.3 ± 60.5 |
Maximum Cold Pain (0–100) | 75.9 ± 21.7 | 73.8 ± 22.2 |
CPM Index | 118.7 ± 36.8* | 142.5 ± 28.6 |
Other Mechanical and Cold Pressor Data Appear in Figs. 1 and 2 | ||