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Child and Adolescent Psychiatry and Mental Health
Published in: Child and Adolescent Psychiatry and Mental Health 1/2015

Open Access 01-12-2015 | Research article

The Ottawa Self-Injury Inventory: Evaluation of an assessment measure of nonsuicidal self-injury in an inpatient sample of adolescents

Authors: Mary K Nixon, Christine Levesque, Michèle Preyde, John Vanderkooy, Paula F. Cloutier

Published in: Child and Adolescent Psychiatry and Mental Health | Issue 1/2015

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Abstract

Background

The Ottawa Self-Injury Inventory (OSI) is a self-report measure that offers a comprehensive assessment of nonsuicidal self-injury (NSSI), including measurement of its functions and addictive features. In a preliminary investigation of self injuring college students who completed the OSI, exploratory analysis revealed four function factors (Internal Emotion Regulation, Social Influence, External Emotion Regulation and Sensation Seeking) and a single Addictive Features factor. Rates of NSSI are particularly high in inpatient psychiatry youth. The OSI can assistin both standardizing assessment regarding functions and potential addictive features and aid case formulation leading to informed treatment planning. This report will describe a confirmatory factor analysis (CFA) of the OSI on youth hospitalized in a psychiatric unit in southwestern Ontario.

Methods

Demographic and self-report data were collected from all youth consecutively admitted to an adolescent in-patient unit who provided consent or assent.

Results

The mean age of the sample was 15.71 years (SD = 1.5) and 76 (81 %) were female. The CFA proved the same four function factors relevant, as in the previous study on college students (χ 2(183) = 231.98, p = .008; χ 2/df = 1.27; CFI = .91; RMSEA = .05). The model yielded significant correlations between factors (rs = .44-.90, p < .001). Higher NSSI frequency was related to higher scores on each function factor (rs = .24-.29, p < .05), except the External Emotion Regulation factor (r = .11, p > .05). The factor structure of the Addictive Features function was also confirmed (χ 2(14) = 21.96, p > .05; χ 2/df = 1.57; CFI = .96; RMSEA = .08). All the items had significant path estimates (.52 to .80). Cronbach’s alpha for the Addictive Features scale was .84 with a mean score of 16.22 (SD = 6.90). Higher Addictive Features scores were related to more frequent NSSI (r = .48, p < .001).

Conclusions

Results show further support for the OSI as a valid and reliable assessment tool in adolescents, in this case in a clinical setting, where results can inform case conceptualization and treatment planning.
Appendix
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Metadata
Title
The Ottawa Self-Injury Inventory: Evaluation of an assessment measure of nonsuicidal self-injury in an inpatient sample of adolescents
Authors
Mary K Nixon
Christine Levesque
Michèle Preyde
John Vanderkooy
Paula F. Cloutier
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Child and Adolescent Psychiatry and Mental Health / Issue 1/2015
Electronic ISSN: 1753-2000
DOI
https://doi.org/10.1186/s13034-015-0056-5

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