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Table 3 Factor loadings and item-test correlations for the cancer patients

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

Item

 

F1

F2

r it

alpha (del)

1

Loss of interest

.54

.47

.60

.82

2

Feeling depressed

.49

.66

.68

.82

3

Sleep problems

.75

.03

.51

.84

4

Loss of energy

.78

.27

.70

.81

5

Appetite problems

.58

.27

.52

.83

6

Self-blame

.33

.65

.54

.83

7

Concentration problems

.65

.32

.61

.82

8

Agitation/retardation

.63

.21

.52

.83

9

Suicidal ideation

.03

.85

.43

.84

  1. F1, F2 factors of the principal component analysis, r it part-whole corrected item-test correlation, alpha (del) cronbach’s alpha if item deleted; bold: coefficients ≥ .60