Pain ratings after noxious mechanical stimulation.

<p>Boxplot of pain ratings by numeric rating scale (NRS) in high- (red boxes) and low-sensitization responders (blue boxes). Noxious mechanical stimulation by pin-prick did not result in any differences in pain scores between high- and low-sensitization responders before burn-injury (high-sensitization responders: 3.6 ± 1.9; low-sensitization responders 2.9 ± 1.8; <i>p</i> = 0.29). After burn-injury there were no differences in pain scores after stimulation in the secondary hyperalgesia areas (high-sensitization responders: 5.0 ± 2.1, low-sensitization responders: 4.4 ± 2.1 (<i>p</i> = 0.37)) or after stimulation in the primary hyperalgesia areas (high-sensitization responders: 6.3 ± 2.1, low-sensitization responders 5.1 ± 2.2, <i>p</i> = 0.08).