Kessler RC, Angermeyer M, Anthony JC, De Graaf R, Demyttenaere K, Gasquet I, et al. Lifetime prevalence and age-of-onset distributions of mental disorders in the World Health Organization’s World Mental Health Survey Initiative. World Psychiatry 2007;6(3):168-76.
Clayborne ZM, Varin M, Colman I. Systematic review and meta-analysis: Adolescent depression and long-term psychosocial outcomes. J Am Acad Child Adolesc Psychiatry 2019;58(1):72-9.
Steinert C, Hofmann M, Leichsenring F, Kruse J. What do we know today about the prospective long-term course of social anxiety disorder? A systematic literature review. J Anxiety Disord 2013;27(7):692-702.
Pine DS, Cohen E, Cohen P, Brook J. Adolescent depressive symptoms as predictors of adult depression: Moodiness or mood disorder. Am J Psychiatry 1999;156(1):133-5.
Topper M, Emmelkamp PMG, Watkins ER, Ehring T. Prevention of anxiety disorders and depression by targeting excessive worry and rumination in adolescents and young adults: A randomized controlled trial. Behav Res Ther 2017;90:123-36.
Wilkinson PO, Croudace TJ, Goodyer IM. Rumination, anxiety, depressive symptoms and subsequent depression in adolescents at risk for psychopathology: A longitudinal cohort study. BMC Psychiatry 2013;13:250.
Van der Gucht K, Takano K, Raes F, Kuppens P. Processes of change in a school-based mindfulness programme: Cognitive reactivity and self-coldness as mediators. Cogn Emot 2018;32(3):658-65.
Perlman D, Peplau LA. Toward a social psychology of loneliness. In: Gilmour R, Duck S (eds.) Personal relationships: vol. 3. Personal relationships in disorder. London: Academic Press; 1981.
Lee RM, Draper M, Lee S. Social connectedness, dysfunctional interpersonal behaviors, and psychological distress: Testing a mediator model. J Couns Psychol 2001;48(3):310-8.
Vanhalst J, Klimstra TA, Luyckx K, Scholte RH, Engels RC, Goossens L. The interplay of loneliness and depressive symptoms across adolescence: Exploring the role of personality traits. J Youth Adolesc 2012;41:776-87.
Asher SR, Weeks MS. Loneliness and belongingness in the college years. In: Coplan RJ, Bowker J (eds.) The handbook of solitude: Psychological perspectives on social isolation, social withdrawal, and being alone. Hoboken, NJ: Wiley-Blackwell; 2014.
Vanhalst J, Luyckx K, Raes F, Goossens L. Loneliness and depressive symptoms: The mediating and moderating role of uncontrollable ruminative thoughts. J Psychol 2012;146(1-2):259-76.
Ehring T, Raes F, Weidacker K, Emmelkamp PMG. Validation of the Dutch version of the perseverative thinking questionnaire (PTQ-NL). Eur J Psychol Assess 2012;28(2):102-08.
Goossens L, Klimstra T, Luyckx K, Vanhalst J, Teppers E. Reliability and validity of the Roberts UCLA Loneliness Scale (RULS-8) with Dutch-speaking adolescents in Belgium. Psychol Belg 2013;54(1):5-18.
Smeets E, Neff K, Alberts H, Peters M. Meeting suffering with kindness: Effects of a brief self-compassion intervention for female college students. J Clin Psychol 2014;70(9):794-807.
Goméz-Pérez L, Wessa M, Flor H. Posttraumatic stress, physical health and chronic pain: The role of hyperarousal and depressive symptoms. J Trauma Stress Disord Treat 2017;6(2).
Xu S, Qiu D, Hahne J, Zhao M, Hu M. Psychometric properties of the short-form UCLA Loneliness Scale (ULS-8) among Chinese adolescents. Medicine 2018;97(38):e12373.
Kim, H. Y. (2013). Statistical notes for clinical researchers: assessing normal distribution (2) using skewness and kurtosis. Restor Dent Endod 2013;38(1):52-4.