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Table 7 Descriptive statistics and reliability statistics for the PSQ-39 scales

From: Psychosomatic symptoms questionnaire (PSQ-39): a psychometric study among general population of Iranian adults

 

Mean (SD)

Cronbach’s α

ICC (%95CI)

Floor (%)

Ceiling (%)

n = 8961

n = 1002

n = 8961

n = 1002

n = 1002

n = 8961

n = 1002

n = 896

n = 1002

Cardiorespiratory

11.8 (5.35)

11.75 (4.63)

0.92

0.88

0.986 (0.980, 0.991)

38.7

34.3

0.1

1

Musculoskeletal

11.2 (5.17)

10.76 (4.57)

0.88

0.87

0.993(0.989, 0.995)

23.6

25

0.1

1

Psychological

14.45 (6.53)

13.47 (5.41)

0.91

0.88

0.994 (0.990, 0.996)

16.3

16

0.6

1

Gastrointestinal

6.43 (2.94)

6.40 (2.74)

0.83

0.82

0.985 (0.978, 0.990)

38.6

31.3

0.2

1

General

7.55 (3.33)

7.55 (3.61)

0.80

0.85

0.989 (0.984, 0.993)

40.7

39

0.1

1

Body Balance

8.74 (3.06)

8.67 (2.61)

0.74

0.59

0.952 (0.930, 0.968)

28.4

21.2

0.1

1

Globus

3.66 (1.42)

3.61 (1.28)

0.72

0.70

0.945 (0.920, 0.963)

71.7

73

0.2

1

Total Score

62.74 (21.23)

61.90 (18.34)

0.95

0.94

0.997 (0.995,0.998)

8.2

2.1

0.1

1

  1. ICC Intraclass Coefficient; 1 Total sample, 2 Pilot sample