title: Validation of the internet-administered Quality of Life Inventory (QOLI) in different psychiatric conditions.
abstract: The Quality of Life Inventory (QOLI) is an established rating scale of self-perceived quality of life across 16 domains. Norms for different psychiatric conditions when rated via the Internet, responsiveness to change following treatment, and the clinical impact of importance-weighting items have yet to be examined. To investigate these unanswered questions, important for the continued and expanded use of the QOLI, we compiled archival screening and post-treatment data from 20 studies featuring Internet-delivered psychological interventions for seven different psychiatric conditions and an undergraduate sample, totalling over 4000 participants. Disorder-specific norms were indicated by between-group analyses and are reported here, item-by-item. The QOLI showed adequate responsiveness to change and construct validity. Discrepancies were found when conducting between-group analyses with and without weighted items (more significant differences when items were not weighted) on both the screening and post-treatment data, suggesting that weighting is a procedure that is likely to have an impact when analysing QOLI results. Limitations and the needs for future research are discussed.
authors.affiliation: a Department of Clinical Neuroscience , Karolinska Institutet , Stockholm , Sweden.
authors.forename: Philip
authors.initials: P
authors.lastname: Lindner
authors.forename: Gerhard
authors.initials: G
authors.lastname: Andersson
authors.forename: Lars-Göran
authors.initials: LG
authors.lastname: Ost
authors.forename: Per
authors.initials: P
authors.lastname: Carlbring
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D001523:Mental Disorders / Q000523:psychology*; D008875:Middle Aged; D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D011795:Surveys and Questionnaires