Table 2.
Measurements, intrasession and intersession reliability
| Session 1 mean (SD) | Session 2 mean (SD) | Cronbach’s alpha | Difference mean (SD) | Pearson’s correlation coefficient | One-sample t-test – difference P-value | |
|---|---|---|---|---|---|---|
| Test 1: TTS (0–42) | 6.2 (4.5) | 6.6 (4.4) | 0.4 (2.8) | 0.81b | 0.522 | |
| Test 2: PPT | ||||||
| Second finger kPa | 104.4a (56.9) | 119.3a (59.3) | 0.931 | 14.9 (37.4) | 0.79b | 0.058 |
| m. temporalis kPa | 104.1a (48.0) | 118.1a (40.5) | 0.955 | 13.9 (28.2) | 0.81b | 0.021 |
| m. trapezius kPa | 100.6a (42.4) | 119.6a (50.7) | 0.921 | 19.0 (37.0) | 0.70b | 0.017 |
| Test 3: VAS score at SupraPPT | ||||||
| Second finger | 2.7 (2.1) | 2.5 (2.0) | −0.19 (1.27) | 0.81b | 0.466 | |
| m. temporalis cm | 3.3 (2.5) | 3.4 (2.0) | 0.08 (1.72) | 0.74b | 0.827 | |
| m. trapezius cm | 3.1 (2.5) | 3.4 (2.5) | 0.30 (2.06) | 0.66b | 0.468 | |
| Test 4: AUC – (stimulus–response functions) | ||||||
| m. temporalis AUC | 222.1 (161.4) | 195.3 (149.9) | −26.8 (99.3) | 0.80b | 0.190 | |
| m. trapezius AUC | 191.1 (131.3) | 159.4 (136.1) | −31.7 (93.0) | 0.76b | 0.101 | |
Notes:
The average of the three measurements on each test day;
P < 0.001. Results from Tests 1–4 in the first and second session are presented. Calculated in the first session, Cronbach’s alfa is a measurement of the internal reliability of the individual test, ie, of the intrasession reliability. Difference mean (SD) represents the mean of the difference initially calculated for each participant between sessions 1 and 2. Pearson’s correlation coefficient represents the intersession reliability of the different subtests. The one-sample t-test tests the H0: diff = 0. According to the Benjamini–Hochberg correction for multiplicity, P < 0.0056 rejects H0: diff = 0 and indicates a statistically significant systematic difference between sessions 1 and 2.
Abbreviations: SD, standard deviation; TTS, Total Tenderness Score; PPT, pressure pain threshold; VAS, Visual Analog Scale; SupraPPT, pressure pain threshold-adjusted suprathreshold; AUC, area under the curve.