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Table 5 Correlations between item scores of the PHQ-9 and scale scores of other instruments in the cancer patients’ sample

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

Item

 

EORTC

EORTC

GAD

FoP

EORTC

EORTC

EORTC

Emot. Funct.

Cognit. Funct.

Anxiety

Fear of Progression

Quality of Life

Physical Funct.

Fatigue

1

Loss of interest

-.51

-.37

.45

.43

-.53

-.43

.49

2

Feeling depressed

-.62

-.39

.60

.54

-.51

-.40

.49

3

Sleep problems

-.44

-.33

.40

.41

-.38

-.34

.46

4

Loss of energy

-.61

-.48

.52

.52

-.58

-.51

.70

5

Appetite problems

-.42

-.32

.39

.37

-.39

-.34

.43

6

Self-blame

-.49

-.36

.49

.40

-.32

-.22

.34

7

Concentration problems

-.53

-.72

.48

.44

-.42

-.36

.49

8

Agitation/retardation

-.46

-.48

.47

.36

-.35

-.35

.42

9

Suicidal ideation

-.37

-.30

.47

.32

-.29

-.24

.27

 

Sum score

-.74

-.62

.70

.63

-.63

-.54

.69

  1. Bold coefficients > 0.50. All coefficients are statistically significant with p < 0.001