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. Author manuscript; available in PMC: 2006 Feb 13.
Published in final edited form as: Pain. 2002 Oct;99(3):459–463. doi: 10.1016/s0304-3959(02)00235-x

Table 3.

Results of regression analyses conducted for the electrocutaneous pain threshold and tolerance assessmenta

Equation R2 Predictor variable(s) Beta t-value P
Electrocutaneous pain threshold
0.08 Sex 0.00 0.03 ns
Drug −0.12 −1.19 ns
Catastrophizing −0.26 −2.50 < 0.05
Electrocutaneous pain tolerance
0.08 Sex −0.20 −1.87 ns
Drug −0.02 −0.19 ns
Catastrophizing −0.19 −1.80 ns
Pain rating index of the short form of MPQ
0.21 Sex −0.13 −1.34 ns
Drug −0.09 −0.92 ns
Catastrophizing 0.45 4.63 < 0.001
a

Predictor variables include sex (male = 0, female = 1), drug (naltrexone = 0, placebo = 1), and pain catastrophizing score.