Pain pressure thresholds in healthy volunteers according to experimental conditions
| Pain pressure threshold—N/cm2 | |||
|---|---|---|---|
| Deltoid | Biceps brachii | Trapezius | |
| Unloaded breathing | |||
| Baseline n=25 | 27.9 (23–42.6) | 20.6 (17.8–32.5) | 24.3 (16.5–31.1) |
| ITL | |||
| ITL6 n=25 | 34.2 (24.1–48.3) | 21.3 (16.5–34.5) | 25.1 (20.2–33.2) |
| ITL8 n=25 | 37 (26.6–48) | 26.3 (19.6–32.8) | 25.4 (20.4–32.4) |
| Two-by-two comparisons | |||
| Baseline vs ITL6 | p=0.037 | p=1 | p=0.32 |
| Baseline vs ITL8 | p=0.003 | p=0.35 | p=0.037 |
| IL6 vs ITL8 | p=0.2 | p=0.52 | p=0.26 |
Values are expressed as medians (IQR).
p Values are provided after Bonferonni's correction.
ITL, inspiratory threshold loading; ITL6, ITL adjusted to induce dyspnoea scored as 50%–70% of full scale on the visual analogue scale; ITL8, ITL adjusted to induced dyspnoea scored as 70%–90% of full scale on the visual analogue scale.