Measuring Depression-Severity in Critically Ill Patients' Families with the Patient Health Questionnaire (PHQ): Tests for Unidimensionality and Longitudinal Measurement Invariance, with Implications for CONSORT Lois Downey, MA, Leslie A. Hayduk, PhD, J. Randall Curtis, MD, MPH, Ruth A. Engelberg, PhD Journal of Pain and Symptom Management Volume 51, Issue 5, Pages 938-946 (May 2016) DOI: 10.1016/j.jpainsymman.2015.12.303 Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions
Fig. 1 The Patient Health Questionnaire-2 model with exogenous predictors. WLSMV = weighted least squares estimation with mean- and variance adjusted χ2. Journal of Pain and Symptom Management 2016 51, 938-946DOI: (10.1016/j.jpainsymman.2015.12.303) Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions