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Table 3 Correlations between the total MDI score and single items and amount of variance in the MDI score explained by each item

From: Brief screening questions for depression in chiropractic patients with low back pain: identification of potentially useful questions and test of their predictive capacity

  Spearman’s rho R-squared
Item 1 .66 .56
Item 2 .72 .59
Item 3 .77 .62
Item 4 .63 .56
Item 5 .61 .48
Item 6 .34 .25
Item 7 .59 .42
Item 8 .74 .56
Item 9 .62 .35
Item 10 .56 .36
  1. All correlations and regression models were statistically significant (p < .001).