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Table 2 Area under the curve of the four measures

From: Detecting insomnia in patients with low back pain: accuracy of four self-report sleep measures

Test

AUC a

95% CI

Pittsburgh questionnaireb

0.79

0.68 to 0.87

Insomnia indexc

0.78

0.67 to 0.86

Roland itemd

0.64

0.53 to 0.75

Epworth scalee

0.53

0.41 to 0.64

  1. a Area under the curve, b Pittsburgh sleep quality index, c Insomnia severity index, d Sleep item of the Roland and Morris disability questionnaire, e Epworth sleepiness scale.