I am an Assistant Professor of Psychology at the Department of Psychology & Communication at the University of Idaho.
My main areas of research are on using statistical modeling to better understand psychological disorders, especially on the predictive modeling of psychiatric treatment outcomes, aggregation of epidemiological and clinical trial data, and modeling the processes of change over the course of treatments for depression.
As of Fall 2025, I am currently recruiting a graduate student and a postdoctoral fellow for a Department of Defense funded research project on the statistical modeling of PTSD risk.
My research has received funding from the Department of Defense (DoD), NIH, and American Psychological Foundation (APF).
Journal Articles
Kim, T., Xu, C., Amsterdam, J. (2025). Comparison of effectiveness and side effects of selegiline transdermal system versus oral monoamine oxidase inhibitors and tricyclic antidepressants for treatment-resistant depression. Journal of Affective Disorders, 376, 47-51 https://doi.org/10.1016/j.jad.2025.02.003
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Kim, T. & Xu, C. (2024). Not all types of depressed patients who persist with their antidepressant treatment improve in side effect complaints: A comparison of treatment completers and dropouts in the STAR*D trial. Acta Psychiatrica Scandinavica, 151(2): 152-162. https://doi.org/10.1111/acps.13764
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Amsterdam, J., & Xu, C. (2023). Multi-trial, aggregated, individual participant data mega-analysis of short-term antidepressant versus mood stabilizer monotherapy of bipolar type II major depressive episode. Bipolar Disorders., 26(3), 255-264. https://doi.org/10.1111/bdi.13378
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Xu, C., Miao, L., Turner, D., & DeRubeis, R. (2023). Urbanicity and depression: A global meta-analysis. Journal of Affective Disorders, 340, 299-311. https://doi.org/10.1016/j.jad.2023.08.030
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Pigott, H. E., Kim, T., Xu, C., Kirsch, I., & Amsterdam, J. (2023). What are the treatment remission, response and extent of improvement rates after up to four trials of antidepressant therapies in real-world depressed patients? A reanalysis of the STAR* D study's patient-level data with fidelity to the original research protocol. BMJ open, 13(7), e063095. http://doi.org/10.1136/bmjopen-2022-063095
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Bredemeier, K., Larsen, S., Shivakumar, G., Grubbs, K., McLean, C., Tress, C., Rosenfield, D., DeRubeis, R., Xu, C., Foa, E., Morland, L., Pai, A., Tsao, C., Crawford, J., Weitz, E., Mayinja, L., Feler, B., Wachsman, T., Lupo, M., Hooper, V., … Thase, M. (2022). A comparison of prolonged exposure therapy, pharmacotherapy, and their combination for PTSD: What works best and for whom; study protocol for a randomized trial. Contemporary Clinical Trials, 119, 106850. https://doi.org/10.1016/j.cct.2022.106850
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Kim, T. T., Xu, C., & DeRubeis, R. J. (2022). Mapping Female Patients’ Judgments of Satisfaction to Hypothetical Changes in Depression Symptom Severity. Behavior Therapy, 53(2), 392-399. https://doi.org/10.1016/j.beth.2021.10.003
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Kim, T. T., Xu, C., & Derubeis, R. J. (2022). Patients’ judgments of the importance of treatment-induced reductions in symptoms of depression: The role of specific symptoms, magnitudes of change, and post-treatment levels. Psychotherapy Research, 32(3), 404-413. https://doi.org/10.1080/10503307.2021.1938731
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Xu, C., Gelberg, H., & DeRubeis, R. J. (2021). Emotion regulation strategy correlates with discrete state emotion in major depression. Anxiety, Stress, & Coping, 1-12. https://doi.org/10.1080/10615806.2021.2015578
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Khazanov, G. K., Xu, C., Hollon, S. D., DeRubeis, R. J., & Thase, M. E. (2021). Adding cognitive therapy to antidepressant medications decreases suicidal ideation. Journal of Affective Disorders, 281, 183-191. https://doi.org/10.1016/j.jad.2020.12.032
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DeRubeis, R. J., Zajecka, J., Shelton, R. C., Amsterdam, J. D., Fawcett, J., Xu, C., ... & Hollon, S. D. (2020). Prevention of recurrence after recovery from a major depressive episode with antidepressant medication alone or in combination with cognitive behavioral therapy: a Phase 2 randomized clinical trial. JAMA Psychiatry, 77(3), 237-245. https://doi.org/10.1001/jamapsychiatry.2019.3900
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Dunn, B. D., German, R. E., Khazanov, G., Xu, C., Hollon, S. D., & DeRubeis, R. J. (2020). Changes in positive and negative affect during pharmacological treatment and cognitive therapy for major depressive disorder: A secondary analysis of two randomized controlled trials. Clinical Psychological Science, 8(1), 36-51. https://doi.org/10.1177/2167702619863427
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Khazanov, G. K., Xu, C., Dunn, B. D., Cohen, Z. D., DeRubeis, R. J., & Hollon, S. D. (2020). Distress and anhedonia as predictors of depression treatment outcome: a secondary analysis of a randomized clinical trial. Behaviour Research and Therapy, 125, 103507. https://doi.org/10.1016/j.brat.2019.103507
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Kim, T., Xu, C., Amsterdam, J. D. (2019). Relative effectiveness of tricyclic antidepressant versus monoamine oxidase inhibitor monotherapy for treatment-resistant depression. Journal of Affective Disorders 250, 199-203. https://doi.org/10.1016/j.jad.2019.03.028
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Book Chapters
Fung, K., Xu, C., Glazier, B. L., Parsons, C. A., Alden, L. E. (2016). Research in Clinical Psychology: Social Exclusion in Clinical Samples. P. Riva & J. Eck (Eds.) Social Exclusion: Psychological Approaches to Understanding and Reducing Its Impact. Springer. https://doi.org/10.1007/978-3-319-33033-4_8
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