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Table 1 Participant characteristics before treatment

From: A unified Internet-delivered exposure treatment for undifferentiated somatic symptom disorder: single-group prospective feasibility trial

Sociodemographic variables

 Age in years

46 (14), 23–74

 Female gender

22 (67%)

 University educationa

27 (82%)

 Married or de facto

27 (82%)

 Has children

26 (79%)

 Employment

  Working full-time

21 (64%)

  Working part-time (< 90%)

7 (21%)

  Retired

4 (12%)

  Student

1 (3%)

Clinical variables

 Somatic symptom disorder

  Somatic symptom burden (PHQ-15)b

11.8 (4.6), 3–20

  Symptom preoccupation (SSD-12)b

33.2 (8.1), 22–47

  Functional impairment (WD2-12)b

20.3 (16.1), 2.1–68.8

  Age of onset

35 (18), 7–71

 Psychiatric comorbidity, current

  Major depressive disorder

8 (24%)

  Anxiety disorder, PTSD or OCD

15 (45%)

 Non-psychiatric comorbidity, any time

  Hypertension

8 (24%)

  Migraine

8 (24%)

  Irritable bowel syndrome

7 (21%)

  Osteoarthritis

6 (18%)

  Atrial fibrillation

5 (15%)

  Hiatal hernia

5 (15%)

  Hyper- or hypothyroidism

5 (15%)

  Atopic dermatitis

4 (12%)

  Cancer, any

4 (12%)

  Asthma

3 (9%)

  Fibromyalgia

1 (3%)

  Psoriasis

1 (3%)

  Renal disease

1 (3%)

 Medication

  Psychotropic

15 (45%)

  Pain, prescribed

3 (9%)

Recruitment path

 Searching on the internet

15 (45%)

 Social media platform

6 (18%)

 Friend, acquaintance or family member

3 (9%)

 Routine care clinician

2 (6%)

 Other or does not remember

7 (21%)

  1. Estimates are n (%) or M (SD), range. Psychiatric comorbidity is based on a diagnostic telephone interview and non-psychiatric diagnoses given by a physician are self-reported. OCD Obsessive–compulsive disorder, PHQ-15 Patient Health Questionnaire 15, PTSD Post-traumatic stress disorder, SSD-12 Somatic Symptom Disorder 12, WD2-12 12-item World Health Organization Disability Assessment Schedule 2
  2. aInternational Standard Classification of Education 1997 (ISCED-97) level 4 or higher
  3. bThis refers to the screening values, with conventional questionnaire phrasings (as opposed to revised phrasings to concern the past week only)