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Table 2 Mean scores of the PHQ-9 items and the sum score for cancer patients and the general population

From: Assessment of depression severity with the PHQ-9 in cancer patients and in the general population

Item   Patients General population d
   M SD M SD  
1 Loss of interest 0.71 0.73 0.52 0.63 0.30
2 Feeling depressed 0.59 0.70 0.38 0.60 0.35
3 Sleep problems 1.07 0.95 0.63 0.75 0.59
4 Loss of energy 0.97 0.78 0.65 0.70 0.46
5 Appetite problems 0.45 0.75 0.28 0.56 0.30
6 Self-blame 0.33 0.61 0.20 0.48 0.27
7 Concentration problems 0.64 0.71 0.39 0.60 0.42
8 Agitation/retardation 0.35 0.64 0.16 0.45 0.42
9 Suicidal ideation 0.15 0.43 0.10 0.35 0.14
  Sum score 5.26 4.27 3.30 3.65 0.54
  1. d, effect size