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The online version of this article (doi:10.1007/s11136-017-1522-8) contains supplementary material, which is available to authorized users.
Participants experiencing homelessness and mental illness who received housing and support through the At Home/Chez Soi trial showed modest gains in quality of life (QOL) compared to treatment as usual participants. Participants’ QOL ratings over time may have been affected by either response shift triggered by new life circumstances or by random variation in the meaning of QOL ratings. This study seeks to identify both phenomena to estimate the intervention’s effect on true change in QOL.
Using the residuals from a regression model of the global item of Lehman’s 20-item quality of life interview (QOLI-20), latent trajectory analysis was used to identify response shift, while a measure of overall variability in residuals identified random variation of QOL. The latter was used to adjust group comparisons of QOLI-20 total scores and the global item.
Equivalent distributions of both groups’ participants across latent trajectory classes (χ2 = 2.97, p = .397) suggest that the intervention did not trigger response shift. However, random variation interacted significantly with the treatment effect on global item ratings. For every increase of one standard deviation of residuals, treatment odds ratios decreased by a factor of 0.70 (SE 1.18, p = .036, 95% CI 0.50–0.98).
Measuring random variation in QOL ratings from the standard deviation of residuals offers the ability to approximate, although indirectly, how participants’ QOL is truly affected by a housing intervention. Specifically, we found that QOL improvement is more evident when QOL ratings have a consistent meaning over time.
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Sprangers, M. A., & Schwartz, C. E. (1999). Integrating response shift into health-related quality of life research: A theoretical model. Social Science and Medicine (1982), 48(11), 1507–1515. CrossRef
Mayo, N. E., Scott, S. C., Dendukuri, N., Ahmed, S., & Wood-Dauphinee, S. (2008). Identifying response shift statistically at the individual level. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 17(4), 627–639. doi: 10.1007/s11136-008-9329-2. CrossRef
Schwartz, C. E., Bode, R., Repucci, N., Becker, J., Sprangers, M. A. G., & Fayers, P. M. (2006). The clinical significance of adaptation to changing health: A meta-analysis of response shift. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 15(9), 1533–1550. doi: 10.1007/s11136-006-0025-9. CrossRef
Schwartz, C. E., Merriman, M. P., Reed, G. W., & Hammes, B. J. (2004). Measuring patient treatment preferences in end-of-life care research: Applications for advance care planning interventions and response shift research. Journal of Palliative Medicine, 7(2), 233–245. doi: 10.1089/109662104773709350. CrossRefPubMed
Goering, P. N., Streiner, D. L., Adair, C., Aubry, T., Barker, J., Distasio, J., … Zabkiewicz, D. M. (2011). The At Home/Chez Soi trial protocol: A pragmatic, multi-site, randomised controlled trial of a Housing First intervention for homeless individuals with mental illness in five Canadian cities. BMJ Open, 1(2), e000323–e000323. doi: 10.1136/bmjopen-2011-000323. CrossRefPubMedPubMedCentral
Goering, P., Veldhuizen, S., Watson, A., Adair, C. E., Kopp, B. C., Latimer, E., … Aubry, T. (2014). National At Home/ Chez Soi Final Report. Calgary, AB: Mental Health Commission of Canada. Retrieved from http://www.mentalhealthcommission.ca.
Ahmed, S., Mayo, N., Scott, S., Kuspinar, A., & Schwartz, C. (2011). Using latent trajectory analysis of residuals to detect response shift in general health among patients with multiple sclerosis. [corrected]. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 20(10), 1555–1560. doi: 10.1007/s11136-011-0005-6. CrossRef
Stergiopoulos, V., Hwang, S. W., Gozdzik, A., Nisenbaum, R., Latimer, E., Rabouin, D., Goering, P. N. (2015). Effect of scattered-site housing using rent supplements and intensive case management on housing stability among homeless adults with mental illness: A Randomized Trial. JAMA: The Journal of The American Medical Association, 313(9), 905. doi: 10.1001/jama.2015.1163. CrossRefPubMed
Aubry, T., Goering, P., Veldhuizen, S., Adair, C. E., Bourque, J., Distasio, J., Streiner, D. L. (2015). A randomized controlled trial in five Canadian cities of the effectiveness of housing first with assertive community treatment for persons with serious mental illness and a history of homelessness. Psychiatric Services, 67(3), 275–281. CrossRefPubMed
Sheehan, D., & Lecrubier, Y. (2010). The Mini International Neuropsychiatric Interview Version 6.0 (MINI 6.0). Jacksonville, FL: Medical Outcomes System Inc.
Lam, J. A., & Rosenheck, R. A. (2000). Correlates of improvement in quality of life among homeless persons with serious mental illness. Psychiatric Services (Washington, D.C.), 51(1), 116–118. CrossRef
Lehman, A. F., Postrado, L. T., & Rachuba, L. T. (1993). Convergent validation of quality of life assessments for persons with severe mental illnesses. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 2(5), 327–333. CrossRef
Lehman, A. F., Kernan, E., DeForge, B. R., & Dixon, L. B. (1995). Effects of homelessness on the quality of life of persons with severe mental illness. Psychiatric Services (Washington, D.C.), 46(9), 922–926. CrossRef
Statistics Canada. (2005). Canadian Community Health Survey (Survey). Ottawa, ON: Statistical Society of Canada.
Dennis, M. L., Chan, Y.-F., & Funk, R. R. (2006). Development and validation of the GAIN Short Screener (GSS) for internalizing, externalizing and substance use disorders and crime/violence problems among adolescents and adults. The American Journal on Addictions/ American Academy of Psychiatrists in Alcoholism and Addictions, 15 (Suppl 1), 80–91. doi: 10.1080/10550490601006055. CrossRef
Boucekine, M., Boyer, L., Baumstarck, K., Millier, A., Ghattas, B., Auquier, P., & Toumi, M. (2015). Exploring the response shift effect on the quality of life of patients with schizophrenia: An application of the random forest method. Medical Decision Making: An International Journal of the Society for Medical Decision Making, 35(3), 388–397. doi: 10.1177/0272989X14559273. CrossRef
Proust-Lima, C., Philipps, V., & Liquet, B. (2015). Estimation of extended mixed models using latent classes and latent processes: the R package lcmm. arXiv:1503.00890 [stat]. Retrieved from http://arxiv.org/abs/1503.00890.
StataCorp (2013). Stata Statistical Software: Release 13. College Station, TX: StataCorp LP.
Spearman, C. (1910). Correlation calculated from faulty data. British Journal of Psychology (1904), 3(3), 271–295. doi: 10.1111/j.2044-8295.1910.tb00206.x.
Barclay-Goddard, R., Epstein, J. D., & Mayo, N. E. (2009). Response shift: A brief overview and proposed research priorities. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 18(3), 335–346. doi: 10.1007/s11136-009-9450-x. CrossRef
Schwartz, C. E., Quaranto, B. R., Rapkin, B. D., Healy, B. C., Vollmer, T., & Sprangers, M. A. G. (2014). Fluctuations in appraisal over time in the context of stable versus non-stable health. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 23(1), 9–19. doi: 10.1007/s11136-013-0471-0. CrossRef
Evans, S., & Huxley, P. (2005). Adaptation, response-shift and quality of life ratings in mentally well and unwell groups. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 14(7), 1719–1732. CrossRef
Ahmed, S., Mayo, N. E., Wood-Dauphinee, S., Hanley, J. A., & Cohen, S. R. (2005). Using the patient generated index to evaluate response shift post-stroke. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 14(10), 2247–2257. doi: 10.1007/s11136-005-8118-4. CrossRef
Schwartz, C. E., Sprangers, M. A. G., Oort, F. J., Ahmed, S., Bode, R., Li, Y., & Vollmer, T. (2011). Response shift in patients with multiple sclerosis: An application of three statistical techniques. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 20(10), 1561–1572. doi: 10.1007/s11136-011-0056-8. CrossRef
- Changes in quality of life from a homelessness intervention: true change, response shift, or random variation
Guido Antonio Powell
Carol E. Adair
David L. Streiner
- Springer International Publishing