Loneliness, depression, anxiety, and post-traumatic stress disorder among Chinese adults during COVID-19: A cross-sectional online survey.

Objectives: This study aims to investigate the potential factors associated with mental health outcomes among Chinese adults during the Coronavirus disease 2019 (COVID-19) epidemic.

Methods: This is an online cross-sectional survey conducted among Chinese adults in February 2020. Outcome measurements included the three-item UCLA Loneliness Scale (UCLA-3), two-item Patient Health Questionnaire (PHQ-2), two-item Generalized Anxiety Disorder Questionnaire (GAD-2), and two items from the Clinician-Administered Post-traumatic Stress Disorder (PTSD) Scale.