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Evaluation Of The Brief Illness Perception Questionnaire In Sub-Acute And Chronic Low Back Pain Patients: Data Quality, Reliability And Validity | OMICS International | Abstract
ISSN: 2167-0846

Journal of Pain & Relief
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Research Article

Evaluation Of The Brief Illness Perception Questionnaire In Sub-Acute And Chronic Low Back Pain Patients: Data Quality, Reliability And Validity

Løchting I1,2*, Garratt AM3,4, Storheim K1,5,6, Werner EL7 and Grotle M1,8
1Communication and Research Unit for Musculoskeletal Disorders (FORMI), Oslo University Hospital, Ullevaal, PO Box 4950 Nydalen, 0424 Oslo, Norway
2University of Oslo, Department of Clinical Medicine, P.O. Box 1171 Blindern0318 Oslo
3National Resource Centre for Rehabilitation in Rheumatology, Department of Rheumatology, Diakonhjemmet Hospital, Oslo, PO Box 23 Vinderen, 0319 Oslo, Norway
4Norwegian Knowledge Centre for the Health Services, PO Box 7004, St. Olavs plass, N-0130 Oslo, Norway
5Orthopedic Department, Oslo University Hospital Ullevaal, PO Box 4950 Nydalen, 0424 Oslo, Norway
6University of Oslo, Department of Health Sciences, PO Box 1074, Blindern, 0316 Oslo, Norway
7Research Unit for General Practice, Uni Research, Uni Health, Bergen, Norway
8Oslo University college, Faculty of Health Science, PO Box 4, St. Olavs Plass, N-0130 Oslo, Norway
Corresponding Author : Ida Løchting
Communication and Research Unit for Musculoskeletal Disorders (FORMI)
Oslo University Hospital, Ullevaal
PO Box 4950 Nydalen, 0424 Oslo, Norway
Tel: 0047 91 83 27 00
E-mail: [email protected]
Received September 04, 2013; Accepted October 09, 2013; Published October 11, 2013
Citation: Løchting I, Garratt AM, Storheim K, Werner EL, Grotle M (2013) Evaluation of the Brief Illness Perception Questionnaire in Sub-Acute and Chronic Low Back Pain Patients: Data Quality, Reliability and Validity. J Pain Relief 2:122. doi: 10.4172/2167-0846.1000122
Copyright: © 2013 Løchting I, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Background

Illness perceptions have received increasing attention in the treatment of a range of illnesses and medical conditions, however, the instruments available have not been evaluated on sub-acute and chronic low back pain patients. This study aims to evaluate the Brief IPQ in the prevailing patient group. Methods

The Brief IPQ was administered to 90 patients attending care in Norway and evaluated for data quality, reliability and validity. The questionnaire was re-administered to 61 patients within a week for re-test purposes. The evaluation followed COSMIN recommendations for measurement properties.

Results

Item missing data ranged from 0% to 6.7%. Item-total correlation ranged from 0.12 to 0.67. Cronbach’s alpha was 0.72 for the Brief IPQ scale. Test-retest intra class correlation (ICC) values were 0.86 for the scale and ranged from 0.64 to 0.88 for the individual items. The standard error of measurement (SEM) for the Brief IPQ scale (0- 10) was 0.63 and the minimal detectable change (MDC) was 1.75. The MDC for single items (0-10) ranged from 3.16 to 4.40. Brief IPQ scale scores were approximately normally distributed and had small to moderate correlations with the reference scales supporting the hypotheses, however, the hypothesis were only partly supported on single item level.

Conclusions

The Brief IPQ can be applied as a concise instrument for assessing illness perceptions of patients with sub-acute and chronic low back pain. The Brief IPQ scale has evidence for reliability and validity however the evidence was less satisfactory at the item level.

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