Instituto Peruano de Orientación Psicológica

Psychometric Properties of a Spanish Version of the Fear of COVID-19 Scale in General Population of Lima, Peru

Jeff Huarcaya-Victoria, David Villarreal‐Zegarra, Ángela Podestà et al. · International Journal of Mental Health and Addiction · 2020 · 190 citations · Full text

Valid group comparisons can be made with the Patient Health Questionnaire (PHQ-9): A measurement invariance study across groups by demographic characteristics

David Villarreal‐Zegarra, Anthony Copez-Lonzoy, Antonio Bernabé‐Ortiz et al. · PLoS ONE · 2019 · 182 citations · Full text

Sensitivity and specificity of the Patient Health Questionnaire (PHQ-9, PHQ-8, PHQ-2) and General Anxiety Disorder scale (GAD-7, GAD-2) for depression and anxiety diagnosis: a cross-sectional study in a Peruvian hospital population

David Villarreal‐Zegarra, Juan Barrera-Begazo, Sharlyn Otazú-Alfaro et al. · BMJ Open · 2023 · 60 citations · Full text

Trends in the prevalence and treatment of depressive symptoms in Peru: a population-based study

David Villarreal‐Zegarra, Milagros Cabrera-Alva, Rodrigo M. Carrillo‐Larco et al. · BMJ Open · 2020 · 50 citations · Full text

Depression, post-traumatic stress, anxiety, and fear of COVID-19 in the general population and health-care workers: prevalence, relationship, and explicative model in Peru

David Villarreal‐Zegarra, Anthony Copez-Lonzoy, Ana L. Vilela-Estrada et al. · BMC Psychiatry · 2021 · 34 citations · Full text