Liming Dong1, Linda S Williams2, Emily Briceno3, Lewis B Morgenstern4, Lynda D Lisabeth5. 1. Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA. Electronic address: lmdong@umich.edu. 2. Health Services Research and Development Center for Health Information and Communication, Roudebush VA Medical Center, Indianapolis, IN, USA; Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA; Regenstrief Institute, Inc., Indianapolis, IN, USA. Electronic address: linda.williams6@va.gov. 3. Department of Physical Medicine and Rehabilitation, University of Michigan Medical School, Ann Arbor, MI, USA. Electronic address: emilande@med.umich.edu. 4. Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA; Stroke Program, University of Michigan Medical School, Ann Arbor, MI, USA. Electronic address: lmorgens@med.umich.edu. 5. Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA. Electronic address: llisabet@umich.edu.
Abstract
OBJECTIVE: Repeated measurement of depression using summative scores of commonly used depression scales assumes that the construct is unidimensional and invariant across time, but little is known about the validity of these assumptions in stroke patients. The study examined the assumptions during the first year after mild to moderate stroke using the 8-item Patient Health Questionnaire (PHQ-8). METHODS: Data were obtained from the 2014-2016 Brain Attack Surveillance in Corpus Christi project, a population-based stroke surveillance study with longitudinal follow-up in Texas, United States. Depressive symptoms were assessed with the PHQ-8 at 3, 6, and 12 months post-stroke (n = 648, 542, 533, respectively). Dimensionality of the PHQ-8 was examined using exploratory bifactor analysis and confirmatory factor analysis (CFA). Based on a one-factor CFA model, longitudinal measurement invariance was examined by fitting configural, weak, strong and strict invariance models sequentially. RESULTS: Mean age was 65.6 (SD = 11.2), half were women, and 56.7% were Mexican American. Reliability measures suggested a generally unidimensional construct (Omega Hierarchical: 0.79-0.86), good internal consistency (Cronbach's alpha: 0.84-0.88) and good temporal stability (intraclass correlation coefficient: 0.838). Configural invariance for equality of item-factor structure (RMSEA = 0.038, CFI = 0.982, WRMR = 0.970) was supported. Partial weak invariance for equality of factor loadings (p = 0.11) was supported by chi-square difference tests, whereas full longitudinal invariance was supported by changes in comparative fit index and root mean square error of approximation. CONCLUSIONS: The findings suggest the PHQ-8 may be a reasonable tool for repeated measurement of depression in stroke patients, and more research on its longitudinal psychometric properties is needed.
OBJECTIVE: Repeated measurement of depression using summative scores of commonly used depression scales assumes that the construct is unidimensional and invariant across time, but little is known about the validity of these assumptions in stroke patients. The study examined the assumptions during the first year after mild to moderate stroke using the 8-item Patient Health Questionnaire (PHQ-8). METHODS: Data were obtained from the 2014-2016 Brain Attack Surveillance in Corpus Christi project, a population-based stroke surveillance study with longitudinal follow-up in Texas, United States. Depressive symptoms were assessed with the PHQ-8 at 3, 6, and 12 months post-stroke (n = 648, 542, 533, respectively). Dimensionality of the PHQ-8 was examined using exploratory bifactor analysis and confirmatory factor analysis (CFA). Based on a one-factor CFA model, longitudinal measurement invariance was examined by fitting configural, weak, strong and strict invariance models sequentially. RESULTS: Mean age was 65.6 (SD = 11.2), half were women, and 56.7% were Mexican American. Reliability measures suggested a generally unidimensional construct (Omega Hierarchical: 0.79-0.86), good internal consistency (Cronbach's alpha: 0.84-0.88) and good temporal stability (intraclass correlation coefficient: 0.838). Configural invariance for equality of item-factor structure (RMSEA = 0.038, CFI = 0.982, WRMR = 0.970) was supported. Partial weak invariance for equality of factor loadings (p = 0.11) was supported by chi-square difference tests, whereas full longitudinal invariance was supported by changes in comparative fit index and root mean square error of approximation. CONCLUSIONS: The findings suggest the PHQ-8 may be a reasonable tool for repeated measurement of depression in stroke patients, and more research on its longitudinal psychometric properties is needed.
Authors: Boliang Guo; Catherine Kaylor-Hughes; Anne Garland; Neil Nixon; Tim Sweeney; Sandra Simpson; Tim Dalgleish; Rajini Ramana; Min Yang; Richard Morriss Journal: J Affect Disord Date: 2017-05-08 Impact factor: 4.839
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Authors: Yin Wu; Brooke Levis; Kira E Riehm; Nazanin Saadat; Alexander W Levis; Marleine Azar; Danielle B Rice; Jill Boruff; Pim Cuijpers; Simon Gilbody; John P A Ioannidis; Lorie A Kloda; Dean McMillan; Scott B Patten; Ian Shrier; Roy C Ziegelstein; Dickens H Akena; Bruce Arroll; Liat Ayalon; Hamid R Baradaran; Murray Baron; Charles H Bombardier; Peter Butterworth; Gregory Carter; Marcos H Chagas; Juliana C N Chan; Rushina Cholera; Yeates Conwell; Janneke M de Man-van Ginkel; Jesse R Fann; Felix H Fischer; Daniel Fung; Bizu Gelaye; Felicity Goodyear-Smith; Catherine G Greeno; Brian J Hall; Patricia A Harrison; Martin Härter; Ulrich Hegerl; Leanne Hides; Stevan E Hobfoll; Marie Hudson; Thomas Hyphantis; Masatoshi Inagaki; Nathalie Jetté; Mohammad E Khamseh; Kim M Kiely; Yunxin Kwan; Femke Lamers; Shen-Ing Liu; Manote Lotrakul; Sonia R Loureiro; Bernd Löwe; Anthony McGuire; Sherina Mohd-Sidik; Tiago N Munhoz; Kumiko Muramatsu; Flávia L Osório; Vikram Patel; Brian W Pence; Philippe Persoons; Angelo Picardi; Katrin Reuter; Alasdair G Rooney; Iná S Santos; Juwita Shaaban; Abbey Sidebottom; Adam Simning; Lesley Stafford; Sharon Sung; Pei Lin Lynnette Tan; Alyna Turner; Henk C van Weert; Jennifer White; Mary A Whooley; Kirsty Winkley; Mitsuhiko Yamada; Andrea Benedetti; Brett D Thombs Journal: Psychol Med Date: 2019-07-12 Impact factor: 10.592