Table 3.
Test | Persistent n = 19 | Recovered n = 29 | Total N = 48 | p Value | Normala N = 69 |
---|---|---|---|---|---|
Cold detection threshold (°C) | |||||
Remote site | 26.31 (1.02) | 28.63 (0.24) | 27.71 (0.45) | .0126* | 28.66 (0.19) |
Back | 26.66 (0.94) | 28.92 (0.22) | 28.03 (0.42) | .0131* | 29.13 (0.14) |
Warm detection threshold (°C) | |||||
Remote site | 36.68 (0.68) | 35.25 (0.26) | 35.81 (0.32) | .0448* | 35.20 (0.22) |
Back | 36.67 (0.46) | 34.95 (0.19) | 35.63 (0.24) | .0024* | 34.76 (0.21) |
Cold pain threshold (°C) | |||||
Remote site | 19.81 (1.33) | 20.28 (1.33) | 20.09 (0.95) | .9356 | 14.93 (1.30) |
Back | 22.28 (1.15) | 22.36 (1.33) | 22.33 (0.92) | .7731 | 16.84 (1.35) |
Heat pain threshold (°C) | |||||
Remote site | 40.30 (0.82) | 38.66 (0.68) | 39.31 (0.53) | .2602 | 39.96 (0.76) |
Back | 39.30 (0.64) | 37.28 (0.59) | 38.08 (0.46) | .1753 | 38.52 (0.70) |
Pressure pain threshold (KPa) | |||||
Remote site | 197.77 (27.75) | 162.80 (18.59) | 176.65 (15.73) | .6185 | 199.06 (13.50) |
Back | 196.97 (40.89) | 145.09 (19.38) | 165.63 (20.06) | .5417 | 284.90 (22.65) |
Mechanical pain threshold (mN) | |||||
Remote site | 6.06 (0.19) | 5.95 (0.16) | 6.00 (0.12) | .2260 | 6.47 (0.11) |
Back | 5.76 (0.19) | 5.41 (0.21) | 5.54 (0.15) | .1695 | 6.37 (0.11) |
Mechanical pain sensitivity (pain rating 0–100) | |||||
Remote site | 2.16 (0.48) | 2.22 (0.35) | 2.19 (0.28) | .8788 | 0.72 (0.15) |
Back | 3.52 (0.64) | 3.51 (0.48) | 3.51 (0.38) | .9876 | 1.02 (0.16) |
Windup ratio (multiple average/single average) | |||||
Remote site | 1.37 (0.16) | 1.09 (0.08) | 1.21 (0.08) | .0271* | 0.59 (0.15) |
Back | 1.41 (0.15) | 1.50 (0.22) | 1.47 (0.14) | .5258 | 1.00 (0.19) |
Mechanical detection threshold (mN) | |||||
Remote site | 3.42 (0.15) | 3.28 (0.10) | 3.34 (0.09) | .5019 | 3.13 (0.08) |
Back | 3.42 (0.18) | 3.52 (0.12) | 3.48 (0.10) | .8737 | 3.36 (0.08) |
Dynamic mechanical allodynia (numbers exhibiting PHS) | |||||
Remote site | 0.36 (0.19) | 0.64 (0.25) | 0.53 (0.17) | .4342 | 0.21 (0.06) |
Back | 2.01 (0.59) | 1.33 (0.39) | 1.60 (0.33) | .2192 | 0.47 (0.10) |
Note. Values are mean (SE). PHS = paradoxical heat sensation.
aReference values for healthy (no-pain) controls acquired at the same study site.
*Analysis of covariance adjusting for the covariates of age, gender, and race.