Depressive Symptoms and Anxiety During the COVID-19 Pandemic: Large, Longitudinal, Cross-sectional Survey

James J MacDonald   ¹ , MA ;   Ryan Baxter-King   ² , BA ;   Lynn Vavreck   ^{2, 3} , PhD ;   Arash Naeim   ⁴ , MD, PhD ;   Neil Wenger   ⁵ , MD, MPH ;   Karen Sepucha   ⁶ , PhD ;   Annette L Stanton   ^{1, 7} , PhD

¹ Department of Psychology, University of California, Los Angeles, Los Angeles, CA, US

² Department of Political Science, College of Letters and Sciences, University of California, Los Angeles, Los Angeles, CA, US

³ Department of Communication, College of Letters and Sciences, University of California, Los Angeles, Los Angeles, CA, US

⁴ Center for SMART Health, Clinical and Translational Science Institute, University of California, Los Angeles, Los Angeles, CA, US

⁵ Division of General Internal Medicine and Health Sciences Research, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, US

⁶ Health Decision Sciences Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, US

⁷ Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, US