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Table 3 Baseline correlations of the Sleep Quality Scale with pain and the MOS Sleep Scale

From: Psychometric properties of a single-item scale to assess sleep quality among individuals with fibromyalgia

  Pearson Correlation (r) with Sleep Quality Scale (-)
  Study 1056 Study 1077
  r p-value r p-value
Average Daily Diary Pain Numeric Rating Scale (-) 0.64 <0.001 0.58 <0.001
MOS Sleep Scales     
    Sleep Disturbance (-) 0.45 <0.001 0.42 <0.001
    Snoring (-) 0.01 0.884 0.00 0.993
    Awaken Short of Breath or with Headache (-) 0.21 <0.001 0.14 <0.001
    Quantity of Sleep (+) -0.31 <0.001 -0.34 <0.001
    Sleep Adequacy (+) -0.21 <0.001 -0.32 <0.001
    Somnolence (-) 0.11 0.004 0.15 <0.001
  1. (-) Higher scale scores indicate poorer outcome. (+) Higher scale scores indicate better outcome.