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Table 1 Characteristics of included studies

From: Low intensity technology-delivered cognitive behavioral therapy for obsessive-compulsive disorder: a meta-analysis

Study

Origin of sample

N

%F

Mean Age

(years)

OCD according to

OCD symptoms outcome

Type of t.-d. treatment

Duration of treat-ment (weeks)

Control group condition

Guidance provided by the therapist (type, total minutes)

Andersson et al., 2012 [51]

Sweden

101

66.3

34

DSM-IV-TR

Y-BOCS, OCI-R self-reported

iCBT

10

Other treatments (online non-directive supportive therapy)

Contact if needed via messages, 129

Greist et al., 2002 [52]

USA

176

42

39

DSM-IV

Y-BOCS-SR

BT Steps

10

Other treatments (clinician guided face-to-face), active (relaxation daily, guided by a manual and an audiotape)

Recorded answer to a personal message within 72 h and recorded voice files (IVR-system), 140.5

Hauschildt, Schröder & Moritz, 2016 [53]

Germany

128

67

39

DSM-IV

Y-BOCS

myMCT

4

Other treatments (psychoeducation)

No support, 0

Herbst et al., 2014 [54]

Germany

34

64.7

35.7

DSM-IV

Y-BOCS-SR, OCI-R

iCBT

8

Passive (waitlist)

Feedback via secure web-based communication system, 462

Kyrios et al., 2018 [55]

Australia

179

65.7

33.4

DSM-IV-TR

Y-BOCS

iCBT

12

Other treatments (iPMR)

Email, max. 180

Moritz et al., 2016 [56]

Russia

89

48.3

25.2

Mental health specialist

Y-BOCS-SR, OCI-R

myMCT

6

Passive (waitlist)

No support, 0

Wootton et al., 2013 [57]

Australia

36

93.3

39

DSM-IV

Y-BOCS, DOCS

iCBT

8

Passive (waitlist)

Twice weekly therapist contact, 88.63

Schneider et al., 2014 [58]

Germany

65

55.8

37.3

Mental health specialist

Y-BOCS-SR, OCI-R

COMET

4

Passive (waitlist)

No support, 0

Moritz et al., 2010 [28]

Germany

86

72.1

34.5

Mental health specialist

Y-BOCS-SR, OCI-R

myMCT

4

Passive (waitlist)

Only answers if questions, 0

Moritz et al., 2018 [27]

Germany

70

71.4

38.8

Mental health specialist

Y-BOCS-SR, OCI-R

myMCT

6

Passive (waitlist)

No support, 0

Moritz & Jelinek, 2011 [59]

Germany

46

56.5

36.2

Mental health specialist

Y-BOCS-SR, OCI-R

Associa-tion Splitting

4

Passive (waitlist)

Only answers if questions, 0

Mahoney et al., 2014 [60]

Australia

86

60

39

DSM-IV

DOCS

iCBT

10

Other treatments (TAU which is no CBT treatment, e.g. 13 /35 medication treatment)

Scheduled personalised emails, 6

Moritz et al., 2019 [29, 30]

Different Arabic speaking countries

160

42.9

29

Self-reported

Y-BOCS-SR, OCI-R

myMCT

6

Passive (waitlist)

No support, 0

Moritz, Bernardini & Lion, 2019 [29]

Italian speaking population

80 (OCI-R); 11 (YBOCS)

63.4

41

Self-reported

Y-BOCS-SR, OCI-R

myMCT

6

Passive (waitlist)

Only answers if questions, 0

Wootton et al., 2019 [61]

Australia

140

81.5

33.7

Y-BOCS scored at least 14, DOCS at least 7

Y-BOCS, DOCS

iCBT

8

Passive (waitlist)

Only answers if questions, 0

Vogel et al., 2014 [62]

Norway

20

50

35.3

DSM-IV

Y-BOCS

Self-help book (PDF)a

12

Passive (Waitlist), Other treatments (video-conference assisted ERP)

Only answers if questions, 0

Moritz & Russu, 2013 [56]

Russia

72

44.4

23.8

60 diagnosed by specialist, 12 self-diagnosed

Y-BOCS-SR, OCI-R

Association Splitting

4

Passive (Waitlist)

Only answers if questions, 0

Schröder et al., 2020 [63]

Germany

128

76.6

40.22

Y-BOCS scored at least 8

Y-BOCS-SR

iCBT

8

Other treatments (face-to-face CBT)

No support, 0

  1. DSM-IV Diagnostic and Statistical Manual of Mental Disorders Fourth Edition, DSM-IV-TR Diagnostic and Statistical Manual of Mental Disorders Fourth Edition - Text Revision, Y-BOCS Yale-Brown Obsessive-Compulsive Scale, OCI-R Obsessive-Compulsive Inventory-Revised, DOCS Dimensional Obsessive-Compulsive Scale, t.-d. technology-delivered, iCBT internet-administered CBT, iPRT internet-based progressive muscle relaxation, BT Steps computerized telephone system with 9 steps of CBT, myMCT Metacognitive training, COMET Competitive Memory Training, TAU treatment as usual; a = by Foa & Kozak (1997)