Dropout from Internet-based treatment for psychological disorders.
OBJECTIVE
The purpose of this review was to present an in-depth analysis of literature identifying the extent of dropout from Internet-based treatment programmes for psychological disorders, and literature exploring the variables associated with dropout from such programmes.


METHODS
A comprehensive literature search was conducted on PSYCHINFO and PUBMED with the keywords: dropouts, drop out, dropout, dropping out, attrition, premature termination, termination, non-compliance, treatment, intervention, and program, each in combination with the key words Internet and web. A total of 19 studies published between 1990 and April 2009 and focusing on dropout from Internet-based treatment programmes involving minimal therapist contact were identified and included in the review.


RESULTS
Dropout ranged from 2 to 83% and a weighted average of 31% of the participants dropped out of treatment. A range of variables have been examined for their association with dropout from Internet-based treatment programmes for psychological disorders. Despite the numerous variables explored, evidence on any specific variables that may make an individual more likely to drop out of Internet-based treatment is currently limited.


CONCLUSIONS
This review highlights the need for more rigorous and theoretically guided research exploring the variables associated with dropping out of Internet-based treatment for psychological disorders.
Melville
Katherine M
KM
Psychological Health Research Unit, Griffith Institute of Health and Medical Research, Griffith University, Brisbane, Queensland, Australia. k.melville@griffith.edu.au
Casey
Leanne M
LM
Kavanagh
David J
DJ
D001008:Anxiety Disorders / Q000453:epidemiology / Q000523:psychology / Q000628:therapy; D015928:Cognitive Behavioral Therapy / Q000706:statistics & numerical data*; D015897:Comorbidity; D003430:Cross-Sectional Studies; D003866:Depressive Disorder / Q000453:epidemiology / Q000523:psychology / Q000628:therapy; D005260:Female; D006801:Humans; D020407:Internet / Q000706:statistics & numerical data*; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D009042:Motivation; D010349:Patient Compliance / Q000523:psychology / Q000706:statistics & numerical data; D010352:Patient Dropouts / Q000523:psychology* / Q000706:statistics & numerical data*; D012307:Risk Factors; D013313:Stress Disorders, Post-Traumatic / Q000453:epidemiology / Q000523:psychology / Q000628:therapy; D013813:Therapy, Computer-Assisted / Q000706:statistics & numerical data*