Swipe om te navigeren naar een ander artikel
It is important for clinical practice and research that measurement scales of well-being and quality of life exhibit only minimal differential item functioning (DIF). DIF occurs where different groups of people endorse items in a scale to different extents after being matched by the intended scale attribute. We investigate the equivalence or otherwise of common methods of assessing DIF.
Three methods of measuring age- and sex-related DIF (ordinal logistic regression, Rasch analysis and Mantel χ2 procedure) were applied to Hospital Anxiety Depression Scale (HADS) data pertaining to a sample of 1,068 patients consulting primary care practitioners.
Three items were flagged by all three approaches as having either age- or sex-related DIF with a consistent direction of effect; a further three items identified did not meet stricter criteria for important DIF using at least one method. When applying strict criteria for significant DIF, ordinal logistic regression was slightly less sensitive.
Ordinal logistic regression, Rasch analysis and contingency table methods yielded consistent results when identifying DIF in the HADS depression and HADS anxiety scales. Regardless of methods applied, investigators should use a combination of statistical significance, magnitude of the DIF effect and investigator judgement when interpreting the results.
Log in om toegang te krijgen
Met onderstaand(e) abonnement(en) heeft u direct toegang:
Warner, J. (2004). Clinicians’ guide to evaluating diagnostic and screening tests in psychiatry. Advances in Psychiatric Treatment, 10(6), 446–454. CrossRef
Scott, N. W., Fayers, P. M., Aaronson, N. K., Bottomley, A., De Graaf, R., Groenvold, M., et al. (2010). Differential Item Functioning (DIF) analysis of health-related quality of life instruments using logistic regression. Health and Quality of Life Outcomes, 8(81), 1–9.
Isacsson, G., Adler, M. (2011) Randomized clinical trials underestimate the efficacy of antidepressants in less severe depression. Acta Psychiatrica Scandinavica, 125(8), 453–459.
Clauser, B. E., & Mazor, K. M. (1998). Using statistical procedures to identify differentially functioning test items. Educational Measurement: Issues and Practice, 17(1), 31–44. CrossRef
Zumbo, B. D. (1999). A handbook on the theory and methods of Differential Item Functioning (DIF). Ottawa: Directorate of Human Resources Research and Evaluation, National Defense Headquarters.
Bond, T. G., & Fox, C. M. (2007). Applying The Rasch Model. Fundamental measurement in the human sciences (2nd ed.). New Jersey: Lawrence Eribaum Associates Inc.
Linacre, J. M. (2010). Winsteps Rash Measurement, 3.70.0.
Tennant, A., Penta, M., Tesio, L., Grimby, G., Thonnard, J. L., Slade, A., et al. (2004). Assessing and adjusting for cross-cultural validity of impairment and activity limitation scales through differential item functioning within the framework of the Rasch model: the PRO-ESOR project. Medical Care, 42(1 Suppl), I37–I48. PubMed
Penfield, R. D. (2007) DIFAS 4.0: Differential item functioning analysis system user’s manual.
Mantel, N. (1963). Chi square tests with one degree of freedom: Extension of the Mantel-Haenszel procedure. Journal of the American Statistical Association, 58, 690–700.
Penfield, R. D., & Algina, J. (2003). Applying the Liu-Agresti estimator of the cumulative common odds ratio to DIF detection in polytomous items. Journal of Educational Measurement, 40, 353–370. CrossRef
Lambert, S., Pallant, J. F., Girgis, A. (2010) Rasch analysis of the Hospital Anxiety and Depression Scale among caregivers of cancer survivors: Implications for its use in psycho-oncology. Psycho- Oncology , 20(9), 919–925.
Dorans, N. J., & Kulick, E. (2006) Differential item functioning on the Mini-Mental State Examination. An application of the Mantel-Haenszel and standardization procedures. Medical Care, 44(11 Suppl 3):S107–S114.
Jones, R. N. (2006). Identification of measurement differences between English and Spanish language versions of the Mini-Mental State Examination. Detecting differential item functioning using MIMIC modeling. Medial Care, 44(11 Suppl 3):S124–S133.
Orlando Edelen, M. O., Thissen, D., Teresi, J. A., Kleinman, M., & Ocepek-Welikson, K. (2006) Identification of differential item functioning using item response theory and the likelihood-based model comparison approach. Application to the Mini-Mental State Examination. Medical Care, 44(11 Suppl 3):S134–S142.
- A comparison of three methods of assessing differential item functioning (DIF) in the Hospital Anxiety Depression Scale: ordinal logistic regression, Rasch analysis and the Mantel chi-square procedure
Isobel M. Cameron
Neil W. Scott
Ian C. Reid
- Springer International Publishing