Specific and non-specific effects of psychotherapeutic interventions for depression: Results from a meta-analysis of 84 studies

Ahn, 2001, Where oh where are the specific ingredients? A meta-analysis of component studies in counseling and psychotherapy, J. Couns. Psychol., 48, 251, 10.1037/0022-0167.48.3.251 Altman, 2009, Missing outcomes in randomized trials: addressing the dilemma, Open Med., 3, e51 Barth, 2013, Comparative efficacy of seven psychotherapeutic interventions for patients with depression: a network meta-analysis, PLoS Med., 10, e1001454, 10.1371/journal.pmed.1001454 Budd, 2009, The Dodo Bird Verdict—controversial, inevitable and important: a commentary on 30 years of meta-analyses, Clin. Psychol. Psychother., 16, 510, 10.1002/cpp.648 Chatoor, 2001, The role of non-specific factors in treatment outcome of psychotherapy studies, Eur. Child. Adolesc. Psychiatry, 10, I19, 10.1007/s007870170004 Cuijpers, 2010, Efficacy of cognitive–behavioural therapy and other psychological treatments for adult depression: meta-analytic study of publication bias, Br. J. Psychiatry, 196, 173, 10.1192/bjp.bp.109.066001 Cuijpers, 2008, Psychotherapy for depression in adults: a meta-analysis of comparative outcome studies, J. Consult. Clin. Psychol., 76, 909, 10.1037/a0013075 Cuijpers, 2008, Psychological treatment of depression: a meta-analytic database of randomized studies, BMC Psychiatry, 8, 36, 10.1186/1471-244X-8-36 Ekers, 2008, A meta-analysis of randomized trials of behavioural treatment of depression, Psychol. Med., 38, 611, 10.1017/S0033291707001614 Gloaguen, 1998, A meta-analysis of the effects of cognitive therapy in depressed patients, J. Affect. Disord., 49, 59, 10.1016/S0165-0327(97)00199-7 Gøtzsche, 2014, Why I think antidepressants cause more harm than good, Lancet Psychiatry, 1, 104, 10.1016/S2215-0366(14)70280-9 Higgins, 2011, The Cochrane Collaboration's tool for assessing risk of bias in randomised trials, BMJ, 343, d5928, 10.1136/bmj.d5928 2011 Ilardi, 1994, The role of nonspecific factors in cognitive-behavior therapy for depression, Clin. Psychol. Sci. Pract., 1, 138, 10.1111/j.1468-2850.1994.tb00016.x Jacobson, 1996, A component analysis of cognitive-behavioral treatment for depression, J. Consult. Clin. Psychol., 64, 295, 10.1037/0022-006X.64.2.295 Leichsenring, 2004, The efficacy of short-term psychodynamic psychotherapy in specific psychiatric disorders: a meta-analysis, Arch. Gen. Psychiatry, 61, 1208, 10.1001/archpsyc.61.12.1208 Leykin, 2009, Allegiance in psychotherapy outcome research: separating association from bias, Clin. Psychol. Sci. Pract., 16, 54, 10.1111/j.1468-2850.2009.01143.x Liberati, 2009, The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration, PLoS Med., 6, e1000100, 10.1371/journal.pmed.1000100 Little, 2014 Munder, 2013, Researcher allegiance in psychotherapy outcome research: an overview of reviews, Clin. Psychol. Rev., 33, 501, 10.1016/j.cpr.2013.02.002 Munder, 2012, Is the allegiance effect an epiphenomenon of true efficacy differences between treatments? a meta-analysis, J. Couns. Psychol., 59, 631, 10.1037/a0029571 Naudet, 2011, Antidepressant response in major depressive disorder: a meta-regression comparison of randomized controlled trials and observational studies, PloS One, 6, e20811, 10.1371/journal.pone.0020811 Nüesch, 2009, The effects of excluding patients from the analysis in randomised controlled trials: meta-epidemiological study, BMJ, 339, 10.1136/bmj.b3244 Nutt, 2014, Attacks on antidepressants: signs of deep-seated stigma?, Lancet Psychiatry, 1, 102, 10.1016/S2215-0366(14)70232-9 Parker, 2003, Cognitive behavior therapy for depression? Choose horses for courses, Am. J. Psychiatry, 160, 825, 10.1176/appi.ajp.160.5.825 R Development Core Team, 2008 Sterne, 2011, Recommendations for examining and interpreting funnel plot asymmetry in meta-analyses of randomised controlled trials, BMJ, 343, 10.1136/bmj.d4002 Thompson, 2002, How should meta-regression analyses be undertaken and interpreted?, Stat. Med., 21, 1559, 10.1002/sim.1187 Wampold, 2002, A meta-(re)analysis of the effects of cognitive therapy versus “other therapies” for depression, J. Affect. Disord., 68, 159, 10.1016/S0165-0327(00)00287-1 Wampold, 2005, The placebo is powerful: estimating placebo effects in medicine and psychotherapy from randomized clinical trials, J. Clin. Psychol., 61, 835, 10.1002/jclp.20129 White, 2011, Multiple imputation using chained equations: issues and guidance for practice, Stat. Med., 30, 377, 10.1002/sim.4067