Abstract
Purpose
Caregivers, or proxies, often complete patient-reported outcome measures (PROMs) on behalf of patients with stroke. The objective of our study was to assess the validity and responsiveness of proxy-responses compared to patient-responses across multiple domains of health.
Methods
Stroke patients and their proxies were recruited to complete PROMs between 7/2018–11/2019. PROMs included Neuro-QoL cognitive function, PROMIS physical function, satisfaction with social roles, anxiety, fatigue, pain interference, sleep disturbance, Global Health, and PHQ-9. Internal consistency and convergent validity were compared between patient- and proxy-reported measures. Known-groups validity was assessed across levels of stroke disability. Internal responsiveness was evaluated using paired t-tests for a subset of patients who attended rehabilitation following stroke. Analyses were stratified by patients ≤ 3 vs > 3 months from stroke.
Results
This cross-sectional study included 200 stroke patients (age 62.2 ± 13.3, 41.5% female) and their proxies (age 56.5 ± 13.9, 70% female, 72% spouses). PROMs had high internal consistency and were significantly correlated for patients and proxies. Patient- and proxy-reported measures worsened with increasing stroke disability. For 34 (17%) patients who attended rehabilitation, patients self-reported improvement on 5 domains whereas proxies reported no improvement. Compared to patient self-reports, validity was worse for proxy-reports on patients ≤ 3 months but better > 3 months from stroke.
Conclusions
Both patient- and proxy-reported PROMs demonstrated strong validity. Only patient-reported PROMs were responsive to change, and proxies had worse validity for patients ≤ 3 months from stroke but better validity for patients > 3 months from stroke. These findings justify the utilization of proxy responses in stroke patients > 3 months from stroke.
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Data availability
Data not published within the article are available and will be shared by reasonable request.
Code availability
SAS and R code will be shared upon reasonable request.
References
Mayo, N. E., Wood-Dauphinee, S., Cote, R., Durcan, L., & Carlton, J. (2002). Activity, participation, and quality of life 6 months poststroke. Archives of Physical Medicine and Rehabilitation, 83(8), 1035–1042.
Choi-Kwon, S., & Kim, J. S. (2011). Poststroke fatigue: an emerging, critical issue in stroke medicine. International Journal of Stroke, 6(4), 328–336. https://doi.org/10.1111/j.1747-4949.2011.00624.x.
De Wit, L., Putman, K., Baert, I., Lincoln, N. B., Angst, F., Beyens, H., et al. (2008). Anxiety and depression in the first six months after stroke. A longitudinal multicentre study. Disability and Rehabilitation, 30(24), 1858–1866. https://doi.org/10.1080/09638280701708736.
Jonsson, A. C., Lindgren, I., Hallstrom, B., Norrving, B., & Lindgren, A. (2006). Prevalence and intensity of pain after stroke: A population based study focusing on patients’ perspectives. Journal of Neurology, Neurosurgery and Psychiatry, 77(5), 590–595. https://doi.org/10.1136/jnnp.2005.079145.
Katzan, I. L., Thompson, N. R., Uchino, K., & Lapin, B. (2018). The most affected health domains after ischemic stroke. Neurology, 90(16), e1364–e1371. https://doi.org/10.1212/WNL.0000000000005327.
Stewart, J. C., & Cramer, S. C. (2013). Patient-reported measures provide unique insights into motor function after stroke. Stroke, 44(4), 1111–1116. https://doi.org/10.1161/STROKEAHA.111.674671.
Ali, M., Fulton, R., Quinn, T., Brady, M., & Collaboration, V. (2013). How well do standard stroke outcome measures reflect quality of life? A retrospective analysis of clinical trial data. Stroke, 44(11), 3161–3165. https://doi.org/10.1161/STROKEAHA.113.001126.
Katzan, I. L., Thompson, N. R., Lapin, B., & Uchino, K. (2017). Added value of patient-reported outcome measures in stroke clinical practice. Journal of the American Heart Association, 6(7), e005356. https://doi.org/10.1161/JAHA.116.005356.
Reeves, M., Lisabeth, L., Williams, L., Katzan, I., Kapral, M., Deutsch, A., et al. (2018). Patient-Reported Outcome Measures (PROMs) for acute stroke: rationale, methods and future directions. Stroke, 49(6), 1549–1556. https://doi.org/10.1161/STROKEAHA.117.018912.
Cella, D., Riley, W., Stone, A., Rothrock, N., Reeve, B., Yount, S., et al. (2010). The Patient-Reported Outcomes Measurement Information System (PROMIS) developed and tested its first wave of adult self-reported health outcome item banks: 2005–2008. Journal of Clinical Epidemiology, 63(11), 1179–1194. https://doi.org/10.1016/j.jclinepi.2010.04.011.
Cella, D., Lai, J. S., Nowinski, C. J., Victorson, D., Peterman, A., Miller, D., et al. (2012). Neuro-QOL: brief measures of health-related quality of life for clinical research in neurology. Neurology, 78(23), 1860–1867. https://doi.org/10.1212/WNL.0b013e318258f744.
Katzan, I. L., Thompson, N., & Uchino, K. (2016). Innovations in stroke: the use of PROMIS and NeuroQoL scales in clinical stroke trials. Stroke, 47(2), e27-30. https://doi.org/10.1161/STROKEAHA.115.011377.
Katzan, I. L., & Lapin, B. (2018). PROMIS GH (Patient-Reported Outcomes Measurement Information System Global Health) Scale in stroke: A validation study. Stroke, 49(1), 147–154. https://doi.org/10.1161/STROKEAHA.117.018766.
Lapin, B., Thompson, N. R., Schuster, A., & Katzan, I. L. (2019). Clinical utility of patient-reported outcome measurement information system domain scales. Circulation: Cardiovascular Quality and Outcomes, 12(1), e004753. https://doi.org/10.1161/CIRCOUTCOMES.118.004753.
Katzan, I. L., Schuster, A., Bain, M., & Lapin, B. (2019). Clinical symptom profiles after mild-moderate stroke. Journal of the American Heart Association, 8(11), e012421. https://doi.org/10.1161/JAHA.119.012421.
Williams, L. S., Bakas, T., Brizendine, E., Plue, L., Tu, W., Hendrie, H., et al. (2006). How valid are family proxy assessments of stroke patients’ health-related quality of life? Stroke, 37(8), 2081–2085. https://doi.org/10.1161/01.STR.0000230583.10311.9f.
Dorman, P. J., Waddell, F., Slattery, J., Dennis, M., & Sandercock, P. (1997). Are proxy assessments of health status after stroke with the EuroQol questionnaire feasible, accurate, and unbiased? Stroke, 28(10), 1883–1887.
Carod-Artal, F. J., Ferreira Coral, L., StievenTrizotto, D., & Menezes Moreira, C. (2009). Self- and proxy-report agreement on the Stroke Impact Scale. Stroke, 40(10), 3308–3314. https://doi.org/10.1161/STROKEAHA.109.558031.
Pickard, A. S., Johnson, J. A., Feeny, D. H., Shuaib, A., Carriere, K. C., & Nasser, A. M. (2004). Agreement between patient and proxy assessments of health-related quality of life after stroke using the EQ-5D and Health Utilities Index. Stroke, 35(2), 607–612. https://doi.org/10.1161/01.STR.0000110984.91157.BD.
Skolarus, L. E., Sanchez, B. N., Morgenstern, L. B., Garcia, N. M., Smith, M. A., Brown, D. L., et al. (2010). Validity of proxies and correction for proxy use when evaluating social determinants of health in stroke patients. Stroke, 41(3), 510–515. https://doi.org/10.1161/STROKEAHA.109.571703.
Hilari, K., Owen, S., & Farrelly, S. J. (2007). Proxy and self-report agreement on the Stroke and Aphasia Quality of Life Scale-39. Journal of Neurology, Neurosurgery and Psychiatry, 78(10), 1072–1075. https://doi.org/10.1136/jnnp.2006.111476.
Oczkowski, C., & O’Donnell, M. (2010). Reliability of proxy respondents for patients with stroke: A systematic review. The Journal of Stroke & Cerebrovascular Diseases, 19(5), 410–416. https://doi.org/10.1016/j.jstrokecerebrovasdis.2009.08.002.
Sneeuw, K. C., Aaronson, N. K., de Haan, R. J., & Limburg, M. (1997). Assessing quality of life after stroke. The value and limitations of proxy ratings. Stroke, 28(8), 1541–1549.
Lapin, B. R., Thompson, N. R., Schuster, A., & Katzan, I. L. (2020). Magnitude and variability of stroke patient-proxy disagreement across multiple health domains. Archives of Physical Medicine and Rehabilitation. https://doi.org/10.1016/j.apmr.2020.09.378.
Quinn, T. J., Dawson, J., & Walters, M. (2008). Dr John Rankin; his life, legacy and the 50th anniversary of the Rankin Stroke Scale. Scottish Medical Journal, 53(1), 44–47. https://doi.org/10.1258/RSMSMJ.53.1.44.
Kroenke, K., Spitzer, R. L., & Williams, J. B. (2001). The PHQ-9: validity of a brief depression severity measure. Journal of General Internal Medicine, 16(9), 606–613.
Hays, R. D., Bjorner, J. B., Revicki, D. A., Spritzer, K. L., & Cella, D. (2009). Development of physical and mental health summary scores from the patient-reported outcomes measurement information system (PROMIS) global items. Quality of Life Research, 18(7), 873–880. https://doi.org/10.1007/s11136-009-9496-9.
HealthMeasures. (2020). PROMIS. Retrieved December 3, 2020, from www.healthmeasures.net.
Pickard, A. S., & Knight, S. J. (2005). Proxy evaluation of health-related quality of life: a conceptual framework for understanding multiple proxy perspectives. Medical Care, 43(5), 493–499.
Harris, P. A., Taylor, R., Thielke, R., Payne, J., Gonzalez, N., & Conde, J. G. (2009). Research electronic data capture (REDCap)—a metadata-driven methodology and workflow process for providing translational research informatics support. Journal of Biomedical Informatics, 42(2), 377–381. https://doi.org/10.1016/j.jbi.2008.08.010.
Terwee, C. B., Bot, S. D., de Boer, M. R., van der Windt, D. A., Knol, D. L., Dekker, J., et al. (2007). Quality criteria were proposed for measurement properties of health status questionnaires. Journal of Clinical Epidemiology, 60(1), 34–42. https://doi.org/10.1016/j.jclinepi.2006.03.012.
Kline, R. (2011). Principles and practice of structural equation modeling (3rd ed.). New York: Guilford Press.
Reeve, B. B., Wyrwich, K. W., Wu, A. W., Velikova, G., Terwee, C. B., Snyder, C. F., et al. (2013). ISOQOL recommends minimum standards for patient-reported outcome measures used in patient-centered outcomes and comparative effectiveness research. Quality of Life Research, 22(8), 1889–1905. https://doi.org/10.1007/s11136-012-0344-y.
Cicchetti, D. V., & Sparrow, S. A. (1981). Developing criteria for establishing interrater reliability of specific items: Applications to assessment of adaptive behavior. American Journal of Mental Deficiency, 86(2), 127–137.
R Core Team. (2016). R: a language and environment for statistical computing. www.R-project.org. Vienna: R Foundation for Statistical Computing.
Qiu, W., Guan, H., Chen, Z., Yu, Y., Wu, H., Yu, W. S., et al. (2019). Psychometric properties of the Chinese-version Stroke and Aphasia Quality of Life Scale 39-generic version (SAQOL-39g). Topics in Stroke Rehabilitation, 26(2), 106–112. https://doi.org/10.1080/10749357.2018.1544842.
Muus, I., Petzold, M., & Ringsberg, K. C. (2009). Health-related quality of life after stroke: Reliability of proxy responses. Clinical Nursing Research, 18(2), 103–118. https://doi.org/10.1177/1054773809334912.
Schlote, A., Richter, M., Wunderlich, M. T., Poppendick, U., Moller, C., Schwelm, K., et al. (2009). WHODAS II with people after stroke and their relatives. Disability and Rehabilitation, 31(11), 855–864. https://doi.org/10.1080/09638280802355262.
Kozlowski, A. J., Singh, R., Victorson, D., Miskovic, A., Lai, J. S., Harvey, R. L., et al. (2015). Agreement between responses from community-dwelling persons with stroke and their proxies on the NIH neurological quality of life (Neuro-QoL) short forms. Archives of Physical Medicine and Rehabilitation, 96(11), 1986–1992e1914. https://doi.org/10.1016/j.apmr.2015.07.005.
Duncan, P. W., Lai, S. M., Tyler, D., Perera, S., Reker, D. M., & Studenski, S. (2002). Evaluation of proxy responses to the Stroke Impact Scale. Stroke, 33(11), 2593–2599.
Sneeuw, K. C., Sprangers, M. A., & Aaronson, N. K. (2002). The role of health care providers and significant others in evaluating the quality of life of patients with chronic disease. Journal of Clinical Epidemiology, 55(11), 1130–1143. https://doi.org/10.1016/s0895-4356(02)00479-1.
Katzan, I. L., Schuster, A., Newey, C., Uchino, K., & Lapin, B. (2018). Patient-reported outcomes across cerebrovascular event types: More similar than different. Neurology, 91(23), e2182–e2191. https://doi.org/10.1212/WNL.0000000000006626.
Dhand, A., Lang, C. E., Luke, D. A., Kim, A., Li, K., McCafferty, L., et al. (2019). Social network mapping and functional recovery within 6 months of ischemic stroke. Neurorehabilitation and Neural Repair, 33(11), 922–932. https://doi.org/10.1177/1545968319872994.
Rhudy, L. M., Wells-Pittman, J., & Flemming, K. D. (2020). Psychosocial sequelae of stroke in working-age adults: A pilot study. Journal of Neuroscience Nursing. https://doi.org/10.1097/JNN.0000000000000523.
Tran, P. L., Leigh Blizzard, C., Srikanth, V., Hanh, V. T., Lien, N. T., Thang, N. H., et al. (2015). Health-related quality of life after stroke: Reliability and validity of the Duke Health Profile for use in Vietnam. Quality of Life Research, 24(11), 2807–2814. https://doi.org/10.1007/s11136-015-1016-5.
Gershon, R. C., Lai, J. S., Bode, R., Choi, S., Moy, C., Bleck, T., et al. (2012). Neuro-QOL: quality of life item banks for adults with neurological disorders: Item development and calibrations based upon clinical and general population testing. Quality of Life Research, 21(3), 475–486. https://doi.org/10.1007/s11136-011-9958-8.
Buysse, D. J., Yu, L., Moul, D. E., Germain, A., Stover, A., Dodds, N. E., et al. (2010). Development and validation of patient-reported outcome measures for sleep disturbance and sleep-related impairments. Sleep, 33(6), 781–792. https://doi.org/10.1093/sleep/33.6.781.
Kim, J., Chung, H., Amtmann, D., Revicki, D. A., & Cook, K. F. (2013). Measurement invariance of the PROMIS pain interference item bank across community and clinical samples. Quality of Life Research, 22(3), 501–507. https://doi.org/10.1007/s11136-012-0191-x.
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This research was supported by the PhRMA Foundation 2018 Research Starter Grant in Health Outcomes.
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Lapin, B.R., Thompson, N.R., Schuster, A. et al. The validity of proxy responses on patient-reported outcome measures: Are proxies a reliable alternative to stroke patients’ self-report?. Qual Life Res 30, 1735–1745 (2021). https://doi.org/10.1007/s11136-021-02758-9
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DOI: https://doi.org/10.1007/s11136-021-02758-9