Table 1 Patients’ characteristics

Gender

Female

131

81%

Male

31

19%

Age in years (mean, SD)

45

11

Nationality

Dutch

141

87%

Other

21

13%

Marital status

Married or living with partner

110

68%

Unmarried, divorced or widowed

52

32%

Highest education completed

Primary school or less

14

9%

Lower vocational or general secondary education

54

33%

Intermediate vocational or higher general secondary education

57

35%

Higher vocational, pre-university, or university education

36

22%

Missing

1

1%

Employment

Employed

73

45%

Unemployed

89

55%

Number of working hours per week of patients with paid work (mean, SD)

23.9

10.9

Number of working days per week of patients with paid work (mean, SD)

3.9

1.2

Clinical characteristic

n

%

Classification of UPS by SCID-I

Undifferentiated somatoform disorder

63

39%

Chronic pain disorder

99

61%

Duration of UPS in years (median, interquartile range)

9

3-16

Number of comorbid DSM-IV Axis I disorders

No comorbid DSM-IV Axis I disorder

95

59%

One or more comorbid DSM-IV Axis I disorders

67

41%

Number of comorbid DSM-IV Axis II disorders

No comorbid DSM-IV Axis II disorder

113

70%

One or more comorbid DSM-IV Axis II disorders

47

29%

Missing

2

1%

Referrer

Primary medical service

82

51%

Secondary medical service

51

31%

Secondary mental service

29

18%