Psychometric Evaluation of the Brief Illness Perception Questionnaire among Iraqi Patients with Type II Diabetes
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Background: The Brief Illness Perception Questionnaire (B-IPQ) is one of the most widely used measures of emotional and cognitive representations of illness. The B-IPQ has been translated and adapted into many languages. However, the scale has not been translated into Iraqi Arabic in patients with type II diabetes. The main purpose of the present study was to investigate psychometric properties of the B-IPQ among Iraqi patients with type II diabetes.
Methods: In this quantitative study, the Arabic Version of the B-IPQ was given to 192 Iraqi patients with type II diabetes. The participants were randomly selected from 5 hospitals and a diabetes society in Baghdad, Iraq. The participants included individuals diagnosed at least 1 year before this research. Using WINSTEPS computer program, the Rating Scale Model (RSM) was employed as a polytomous extension of the Rasch model (RM) to evaluate the scale in terms of unidimensionality, local independence, item statistics, and rating structures.
Results: The results indicated that the values of infit and oufit mean square (MNSQ) are within the ideal range of 0.60 and 1.40, suggesting that the items of the scale fit to the RM. The data was found to be unidimensional because the first factor explains 5.5% of the unexplained variance with an eigenvalue of 1.5 (< 2). The results also showed that items are locally independent, and both persons and items have high Rasch separation reliability indices. More importantly, the response options or categories of the scale work optimally because with the increase in category values, observed averages also increased.
Conclusion: The overall findings showed that the Arabic version of the B-IPQ is a valid and reliable instrument and can be employed to assess illness perceptions among Iraqi patients with type II diabetes.
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Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43(4), 561-573.
Baghaei, P., & Tabatabaee Yazdi, M. (2016). The logic of latent variable analysis as validity evidence in psychological measurement. Open Psychology Journal, 9(168), 175.
Baghaei, P., & Cassady, J. (2014). Validation of the Persian translation of the Cognitive Test Anxiety Scale. SAGE Open, 4(4), 2158244014555113.
Baghaei, P., Yanagida, T., & Heene, M. (2017). Development of a descriptive fit statistic for the Rasch model. N Am J Psychol, 19(1), 155-168.
Baghaei, P. (2019). A note on the Rasch Model and the instrument-based account of validity. Rasch Measurement Transactions, 32, 1705-1708.
Bazzazian, S., & Besharat, M. A. (2010). Reliability and validity of a Farsi version of the brief illness perception questionnaire. Procedia - Social and Behavioral Sciences, 5, 962-965.
Bond, T. G., & Fox, C. M. (2001). Applying the Rasch Model: Fundamental measurement in the human sciences. New York, NY: Routledge.
Broadbent, E., Petrie, K. J., Main, J., & Weinman, J. (2006). The brief illness perception questionnaire. J Psychosom.Res., 60(6), 631-637. doi:S0022-3999(05)00491-5 [pii];10.1016/j.jpsychores.2005.10.020 [doi]. Retrieved from PM:16731240
Broadbent, E., Wilkes, C., Koschwanez, H., Weinman, J., Norton, S., & Petrie, K. J. (2015). A systematic review and meta-analysis of the Brief Illness Perception Questionnaire. Psychol.Health, 30(11), 1361-1385. doi:10.1080/08870446.2015.1070851 [doi]. Retrieved from PM:26181764
de Raaij, E. J., Schroder, C., Maissan, F. J., Pool, J. J., & Wittink, H. (2012). Cross-cultural adaptation and measurement properties of the Brief Illness Perception Questionnaire-Dutch Language Version. Man Ther, 17(4), 330-335. doi:S1356-689X(12)00051-3 [pii];10.1016/j.math.2012.03.001 [doi]. Retrieved from PM:22483222
Epstein, J., Santo, R. M., & Guillemin, F. (2015). A review of guidelines for cross-cultural adaptation of questionnaires could not bring out a consensus. J Clin.Epidemiol, 68(4), 435-441. doi:S0895-4356(14)00499-5 [pii];10.1016/j.jclinepi.2014.11.021 [doi]. Retrieved from PM:25698408
Hudson, J. L., Bundy, C., Coventry, P. A., & Dickens, C. (2014). Exploring the relationship between cognitive illness representations and poor emotional health and their combined association with diabetes self-care. A systematic review with meta-analysis. J Psychosom.Res., 76(4), 265-274. doi:S0022-3999(14)00046-4 [pii];10.1016/j.jpsychores.2014.02.004 [doi]. Retrieved from PM:24630175
Leventhal, H. , Nerenz, D.R. and Steele, D.J. (1984) Illness representations and coping with health threats. In: Baum, A., Taylor, S.E. and Singer, J.E. (Eds). Handbook of psychology and health, Volume IV: Social psychological aspects of health (pp. 219-252). Hillsdale, NJ: Erlbaum.
Linacre, J. M. (2009). A user's guide to wINSTEPS MINISTEP Rasch-Model computer programs. Chicago, IL: Winsteps.
Linacre, J. M. (2022). Winsteps® Rasch measurement computer program(Version 5.2.2). Portland, OR: Winsteps.
Linacre, J. (1994). Sample Size and Item Calibration Stability. Rasch Measurement Transactions, 7(4), 328.
Linacre, J. (2002). What do infit and outfit, mean-square and standardized mean? Rasch Meas Trans, 16(2), 878.
Moss-Morris, R., Weinman, J., Petrie, K., Horne, R., Cameron, L., & Buick, D. (2002). The Revised Illness Perception Questionnaire (IPQ-R). Psychol Health, 17(1), 1-16.
Petricek, G., Vrcic-Keglevic, M., Vuletic, G., Cerovecki, V., Ozvacic, Z., & Murgic, L. (2009). Illness perception and cardiovascular risk factors in patients with type 2 diabetes: cross-sectional questionnaire study. Croat.Med J, 50(6), 583-593. doi:10.3325/cmj.2009.50.583 [doi]. Retrieved from PM:20017227
Petrie, K. J., & Weinman, J. (2012). Patients’ perceptions of their illness: The dynamo of volition in health care. Curr. Dir. Psychol. Sci., 21(1), 60-65.
Rasch, G. (1960/1980). Probabilistic models for some intelligence and attainment tests (Expanded ed.). Chicago, IL: University of Chicago Press.
Shim, E. J., Jeong, D., Song, Y. W., Lee, S. H., Kim, N. J., & Hahm, B. J. (2020). A network analysis of the Brief Illness Perception Questionnaire in patients with rheumatic diseases and human immunodeficiency virus infection. Psychol Health, 35(7), 838-853. doi:10.1080/08870446.2019.1686150 [doi]. Retrieved from PM:31690118
van Oort, L., Schroder, C., & French, D. P. (2011). What do people think about when they answer the Brief Illness Perception Questionnaire? A 'think-aloud' study. Br.J Health Psychol, 16(Pt 2), 231-245. doi:10.1348/135910710X500819 [doi]. Retrieved from PM:21489052
Weinman, J., Petrie, K. J., Moss-Morris, R., & Horne, R. (1996). The illness perception questionnaire: A new method for assessing the cognitive representation of illness. Psychol Health, 11(3), 431-445.
Wild, D., Grove, A., Martin, M., Eremenco, S., McElroy, S., Verjee-Lorenz, A. et al. (2005). Principles of good practice for the translation and cultural adaptation process for patient-reported outcomes (PRO) measures: Report of the ISPOR Task Force for Translation and Cultural Adaptation. Value.Health, 8(2), 94-104. doi:VHE4054 [pii];10.1111/j.1524-4733.2005.04054.x [doi]. Retrieved from PM:15804318
Wright, B. D. (1996). Local dependency, correlations and principal components. Rasch Measurement Transactions, 10(3), 509-511.
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