Table 2.
Results of receiver operating characteristic (ROC) curve analysis for discrimination between physical pain stimuli and other sympathetic stimuli by NFSC and nSCL.
| Control (32 °C) | Auditory | Visual | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cut off | Sensitivity Specificity |
Area | Cut off | Sensitivity Specificity |
Area | Cut off | Sensitivity Specificity |
Area | ||
| 47 °C | nSCL | 21.84 |
0.70 0.70 |
0.76 | 68.97 |
0.56 0.58 |
0.60 | 39.69 |
0.64 0.63 |
0.66 |
| NFSC | 0.50 |
0.59 0.57 |
0.62 | 0.50 |
0.59 0.54 |
0.60 | 1.5 |
0.42 0.78 |
0.60 | |
| Mech | nSCL | 93.14 |
0.76 0.87 |
0.89 | 152.00 |
0.64 0.78 |
0.77 | 102.80 |
0.75 0.75 |
0.80 |
| NFSC | 0.50 |
0.75 0.57 |
0.70 | 0.50 |
0.75 0.54 |
0.68 | 0.50 |
0.75 0.54 |
0.68 | |
| Cold | nSCL | 22.21 |
0.48 0.70 |
0.59 | – | – | 0.41 | – | – | 0.48 |
| NFSC | 0.5 |
0.55 0.57 |
0.56 | 0.50 |
0.55 0.54 |
0.54 | 0.5 |
0.55 0.54 |
0.54 | |
nSCL could discriminate between common physical pain (heat and mechanical stimulation) and other types of stimuli (including control) significantly better than NFSC. In the stimulus combination where the values of the area under the curve are shown in bold, the area under the curve of nSCL is greater than that of NFSC (P < 0.05). Since the area under the curve of nSCL during cold stimulation was less than 0.5 when it was compared to that during both auditory and visual stimulation, we did not calculate cut off values, sensitivity and specificity for these comparisons. Mech mechanical.