Skip to main content

Table 2 PHQ-based prevalence and comorbidity

From: Utility of the PHQ-9 to identify major depressive disorder in adult patients in Spanish primary care centres

 

Total sample of PHQ respondents (n = 260)

Subsample of PHQ and SCID-I respondents

(n = 178)

 

n

%

n

%

Somatoform disorder (SD)

 SD (≤ 5)

141

54.2

94

52.8

Major depressive disorder (MDD)

 MDD (Algorithm)

178

68.5

124

69.7

 MDD (≤ 10)

203

78.1

138

77.5

Panic disorder (PD)

 PD (Original Algorithm)a

57

21.9

40

22.5

 PD (Modified Algorithm)b

110

42.3

74

41.6

General anxiety disorder (GAD)

 GAD (≤ 10)

180

69.2

128

71.9

Eating disorder

 (PHQ Algorithm)

45

17.3

30

16.9

Alcohol abuse

 (PHQ Algorithm)

38

14.6

25

14.0

Comorbidity

 MDD + GAD

150

57.7

107

60.1

 MDD + SD

115

44.2

81

45.5

 GAD + SD

117

45.0

81

45.5

 MDD + GAD + SD

104

40.0

74

41.6

 GAD + PD

45

17.3

33

18.5

 MDD + PD

40

15.4

30

16.9

 MDD + GAD + PD

37

14.2

29

16.3

 PD + SD

42

16.2

27

15.2

 SD + GAD + PD

36

13.8

25

14.0

 MDD + SD + PD

34

13.1

23

12.9

SD + MDD + PD + GAD

32

12.3

22

12.4

SD + MDD + PD + GAD

1

0.4

1

0.3

+ Eating + Alcohol

    
  1. Note: SD somatoform disorder, MDD major depressive disorder, PD panic disorder, GAD general anxiety disorder, Eating eating disorder, Alcohol alcohol abuse. Comorbidity categories are not exclusive (e.g., “MDD + GAD” comprises “MDD + GAD + SD”)
  2. aOriginal Algorithm: All of the first four questions are answered with “yes,” and presence of four or more somatic symptoms during an anxiety attack
  3. bModified Algorithm: At least two of the first four questions are answered with “yes,” other coding criteria unchanged. (See Muñoz-Navarro et al. for more details; [35])