OBJECTIVE: The goal of this study was to explore the psychometric properties of the Patient Health Questionnaire-9 (PHQ-9; R. L. Spitzer, K. Kroenke, & J. B. W. Williams, 1999). METHOD: Factor analysis and Rasch rating scale analysis were used to examine the psychometric properties of the PHQ-9. The sample consisted of 202 adults with spinal cord injury (SCI). RESULTS: The PHQ-9 items appear to form a usefully unidimensional scale. One "double-barreled" item, "Moving or speaking so slowly that other people could have noticed or being so fidgety or restless that you've been moving around a lot more than usual," misfit the Rasch model. Category probability curves indicate respondent difficulty in distinguishing between the 2 intermediate rating scale categories: several days and more than half the days. Combining these categories eliminated this problem and resulted in all items fitting the measurement model. CONCLUSIONS: The measurement properties of the PHQ-9 can be improved by collapsing rating scale categories and by restructuring several double- and triple-barreled items. Adopting these changes may improve sensitivity in measuring depression after SCI. (PsycINFO Database Record (c) 2009 APA, all rights reserved).
OBJECTIVE: The goal of this study was to explore the psychometric properties of the Patient Health Questionnaire-9 (PHQ-9; R. L. Spitzer, K. Kroenke, & J. B. W. Williams, 1999). METHOD: Factor analysis and Rasch rating scale analysis were used to examine the psychometric properties of the PHQ-9. The sample consisted of 202 adults with spinal cord injury (SCI). RESULTS: The PHQ-9 items appear to form a usefully unidimensional scale. One "double-barreled" item, "Moving or speaking so slowly that other people could have noticed or being so fidgety or restless that you've been moving around a lot more than usual," misfit the Rasch model. Category probability curves indicate respondent difficulty in distinguishing between the 2 intermediate rating scale categories: several days and more than half the days. Combining these categories eliminated this problem and resulted in all items fitting the measurement model. CONCLUSIONS: The measurement properties of the PHQ-9 can be improved by collapsing rating scale categories and by restructuring several double- and triple-barreled items. Adopting these changes may improve sensitivity in measuring depression after SCI. (PsycINFO Database Record (c) 2009 APA, all rights reserved).
Authors: Rebecca M Saracino; Ezgi Aytürk; Heining Cham; Barry Rosenfeld; Leah M Feuerstahler; Christian J Nelson Journal: Psychol Assess Date: 2019-08-08
Authors: P K Crane; L E Gibbons; J H Willig; M J Mugavero; S T Lawrence; J E Schumacher; M S Saag; M M Kitahata; H M Crane Journal: AIDS Care Date: 2010-07
Authors: David S Tulsky; Pamela A Kisala; Claire Z Kalpakjian; Charles H Bombardier; Ryan T Pohlig; Allen W Heinemann; Adam Carle; Seung W Choi Journal: J Spinal Cord Med Date: 2015-05 Impact factor: 1.985
Authors: Nicole Gideon; Nick Hawkes; Jonathan Mond; Rob Saunders; Kate Tchanturia; Lucy Serpell Journal: PLoS One Date: 2016-05-03 Impact factor: 3.240