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Table 3 Correlation between the PEG, BPI Scales, and other Measures at Baseline

From: Development and Initial Validation of the PEG, a Three-item Scale Assessing Pain Intensity and Interference

  Measure
  Correlation coefficient
Study 1 (n = 500)
  BPI severity BPI interference CPG intensity CPG disability Roland disability SF-36 bodily pain*
PEG 0.69 0.89 0.64 0.67 0.60 −0.61
BPI severity 0.58 0.82 0.47 0.41 −0.46
BPI interference 0.62 0.71 0.70 −0.65
Study 2 (n = 638)
  BPI severity BPI interference Functional morbidity Overall pain distress   
PEG 0.84 0.95 0.54 0.77   
BPI severity 0.75 0.47 0.78   
BPI interference 0.55 0.72   
  1. * For SF-36, low score represents worse pain. For all other measures, a high score is worse.