Group Sub-group Descriptor Coefficients 1 sensory 1 temporal flickering 1.12 quivering 0.18 pulsing -0.20 throbbing 1.20 beating 0.44 pounding -1.32 2 spatial jumping 0.70 flashing 0.41 shooting 0.51 3 punctate pressure pricking 0.00 boring 1.62 drilling -0.37 stabbing 1.30 lancinating 0.23 4 inciseve pressure sharp -0.47 cutting 1.28 lacerating -0.41 5 constructive pressure pinching -1.44 pressing -0.34 gnawing 3.62 cramping -0.30 crushing 0.17 6 traction pressure tugging 0.83 pulling 1.24 wrenching -0.56 7 thermal hot 0.13 burning 0.27 scalding 0.00 searing 2.94 8 brightness tingling -1.10 Itchy -0.79 smarting 3.41 stinging -0.55 9 dullness dull 0.34 sore 1.30 hurting -0.77 aching 1.05 heavy 0.95 10 sensory miscellaneous 1 tender -0.34 taut 0.68 rasping 1.13 splitting -0.62 2 effective 11 tension tiring -0.94 exhausting 0.37 12 Autonomic sickening -0.84 suffocating -0.76 13 fear fearful -0.63 frightful 3.14 terrifying 0.16 14 punishment punishing -0.27 grueling -0.29 cruel -1.64 vicious 1.30 killing 0.88 15 affective miscellaneous wretched 0.41 blinding 0.16 3 evaluative 16 evaluative annoying 0.00 troublesome -1.57 miserable 0.07 intense -1.07 unbearable -1.83 4 sensory miscellaneous 2 17 sensory miscellaneous 2 spreading 0.19 radiating 0.93 penetrating -1.07 piercing -0.50 18 sensory miscellaneous 2 tight 0.86 numb -0.14 drawing -1.17 squeezing -1.1 tearing 0.00 19 sensory cool 0.35 cold 0.25 freezing 0. 5 affective miscellaneous 20 affective- evaluative miscellaneous nagging -0.24 nauseating 0.94 agonizing 0.05 dreadful 1.35 torturing 0.07 Constant term -0.49

Table 3: Coefficients for 58 pain descriptors in the MPQ and a constant term in the discriminant function between neuropathic pain and nociceptive pain.