1. 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 (May 2016)
DOI: /j.jpainsymman
Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions

2. 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  , DOI: ( /j.jpainsymman )
Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions