A randomized controlled trial of a web-based treatment for social phobia

ISRCTN	ISRCTN62304985
DOI	https://doi.org/10.1186/ISRCTN62304985
ClinicalTrials.gov (NCT)	Nil known
Clinical Trials Information System (CTIS)	Nil known
Protocol serial number	100011-112345
Sponsor	The Swiss National Science Foundation (Switzerland)
Funder	The Swiss National Science Foundation (Grant ref: 100011-112345)

Prospectively registered

Protocol

Statistical analysis plan

Results

Individual participant data

Plain English summary of protocol

Not provided at time of registration

Prof Franz Caspar
Scientific

40 Blv. du Pont d'Arve
Geneva
1211
Switzerland

Email	franz.caspar@pse.unige.ch

Primary study design	Interventional
Study design	Randomised controlled trial.
Secondary study design	Randomised controlled trial
Scientific title	A randomized controlled trial of a web-based treatment for social phobia
Study acronym	OSP Trial (Online Social Phobia Trial)
Study objectives	To determine whether a new, web-based version of cognitive therapy is an effective treatment for social phobia.
Ethics approval(s)	Approved by the Swiss National Science Foundation on 1 April 2006.
Health condition(s) or problem(s) studied	Social phobia
Intervention	1. Web-based cognitive-behavioral treatment (10 weeks) 2. 10 week wait-list control condition Patients initially allocated to wait will subsequently receive the web-based cognitive-behavioral treatment.
Intervention type	Other
Primary outcome measure(s)	The following will be performed at pre-assessment (baseline), post-assessment (at 10 weeks) and follow-up (at 6 months): 1. Social Phobia Scale 2. Social Interaction Scale 3. Liebowitz Social Anxiety Scale
Key secondary outcome measure(s)	The following will be performed at pre-assessment (baseline), post-assessment (at 10 weeks) and follow-up (at 6 months): 1. Symptom Check List (SCL-90-R) 2. Beck Depression Inventory (BDI) 3. State-Trait Anxiety Inventory (STAI) 4. Inventory of Interpersonal Problems (IIP) 5. Goal Attainment Scaling (GAS)
Completion date	30/06/2008

Participant type(s)	Patient
Age group	Adult
Lower age limit	18 Years
Sex	All
Target sample size at registration	50
Total final enrolment	52
Key inclusion criteria	1. Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) (American Psychiatric Association, 1994) criteria for social phobia. Assessed with the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders IV (SCID IV) 2. Patients are included if the cut off score is reached on the Social Phobia Scale and Social Interaction Scale 3. Age 18 to 35 4. Willing to accept random allocation
Key exclusion criteria	1. Current or past psychosis 2. Borderline personality disorder (other personality disorders are not a reason for exclusion)
Date of first enrolment	20/03/2007
Date of final enrolment	30/06/2008

40 Blv. du Pont d'Arve

Geneva
1211
Switzerland

Individual participant data (IPD) Intention to share	No
IPD sharing plan summary	Not provided at time of registration
IPD sharing plan

Output type	Details	Date created	Date added	Peer reviewed?	Patient-facing?
Results article	results	01/10/2009	23/05/2019	Yes	No
Study website	Study website	11/11/2025	11/11/2025	No	Yes

23/05/2019: Publication reference and total final enrolment added.