References

• Bækkelund, H., Karlsrud, I., Hoffart, A., & Arnevik, E. A. (2021). Stabilizing group treatment for childhood-abuse related PTSD: A randomized controlled trial. European Journal of Psychotraumatology, 12(1), 1859079. https://doi.org/10.1080/20008198.2020.1859079
   PubMed Web of Science ®Google Scholar
• Bennemann, B., Schwartz, B., Giesemann, J., & Lutz, W. (2022). Predicting patients who will drop out of out-patient psychotherapy using machine learning algorithms. The British Journal of Psychiatry, 220(4), 192–201. https://doi.org/10.1192/bjp.2022.17
   Web of Science ®Google Scholar
• Bisson, J. I., Berliner, L., Cloitre, M., Forbes, D., Jensen, T. K., Lewis, C., Monson, C. M., Olff, M., Pilling, S., Riggs, D. S., Roberts, N. P., & Shapiro, F. (2019). The international society for traumatic stress studies New guidelines for the prevention and treatment of posttraumatic stress disorder: Methodology and development process. Journal of Traumatic Stress, 32(4), 475–483. https://doi.org/10.1002/jts.22421
   PubMed Web of Science ®Google Scholar
• Blackburn, I.-M., James, I. A., Milne, D. L., Baker, C., Standart, S., Garland, A., & Reichelt, F. K. (2001). The revised cognitive therapy scale (CTS-R): psychometric properties. Behavioural and Cognitive Psychotherapy, 29(4), 431–446. https://doi.org/10.1017/S1352465801004040
   Web of Science ®Google Scholar
• Clark, D. M. (2018). Realizing the mass public benefit of evidence-based psychological therapies: The IAPT program. Annual Review of Clinical Psychology, 14(1), 159–183. https://doi.org/10.1146/annurev-clinpsy-050817-084833
   PubMed Web of Science ®Google Scholar
• Cloitre, M., Shevlin, M., Brewin, C. R., Bisson, J. I., Roberts, N. P., Maercker, A., Karatzias, T., & Hyland, P. (2018). The international trauma questionnaire: Development of a self-report measure of ICD-11 PTSD and complex PTSD. Acta Psychiatrica Scandinavica, 138(6), 536–546. https://doi.org/10.1111/acps.12956
   PubMed Web of Science ®Google Scholar
• Cloitre, M., Stovall-McClough, K. C., Nooner, K., Zorbas, P., Cherry, S., Jackson, C. L., Gan, W., & Petkova, E. (2010). Treatment for PTSD related to childhood abuse: A randomized controlled trial. American Journal of Psychiatry, 167(8), 915–924. https://doi.org/10.1176/appi.ajp.2010.09081247
   PubMed Web of Science ®Google Scholar
• Cohen, J. (1977). Statistical power analysis for the behavioral sciences. Elsevier, https://doi.org/10.1016/C2013-0-10517-X
   Google Scholar
• Cusack, K., Jonas, D. E., Forneris, C. A., Wines, C., Sonis, J., Middleton, J. C., Feltner, C., Brownley, K. A., Olmsted, K. R., Greenblatt, A., Weil, A., & Gaynes, B. N. (2016). Psychological treatments for adults with posttraumatic stress disorder: A systematic review and meta-analysis. Clinical Psychology Review, 43, 128–141. https://doi.org/10.1016/j.cpr.2015.10.003
   PubMed Web of Science ®Google Scholar
• de Bont, P. A., van den Berg, D. P., van der Vleugel, B. M., de Roos, C., Mulder, C. L., Becker, E. S., de Jongh, A., van der Gaag, M., & van Minnen, A. (2013). A multi-site single blind clinical study to compare the effects of prolonged exposure, eye movement desensitization and reprocessing and waiting list on patients with a current diagnosis of psychosis and co morbid post traumatic stress disorder: Study protocol for the randomized controlled trial treating trauma in psychosis. Trials, 14(1), 151. https://doi.org/10.1186/1745-6215-14-151
   PubMedGoogle Scholar
• Eftekhari, A., Ruzek, J. I., Crowley, J. J., Rosen, C. S., Greenbaum, M. A., & Karlin, B. E. (2013). Effectiveness of national implementation of prolonged exposure therapy in veterans affairs care. JAMA Psychiatry, 70(9), 949. https://doi.org/10.1001/jamapsychiatry.2013.36
   PubMed Web of Science ®Google Scholar
• Egeland, K. M., Skar, A.-M. S., Endsjø, M., Laukvik, E. H., Bækkelund, H., Babaii, A., Granly, L. B., Husebø, G. K., Borge, R. H., Ehrhart, M. G., Sklar, M., Brown, C. H., & Aarons, G. A. (2019). Testing the leadership and organizational change for implementation (LOCI) intervention in Norwegian mental health clinics: A stepped-wedge cluster randomized design study protocol. Implementation Science, 14(1), 28. https://doi.org/10.1186/s13012-019-0873-7
   PubMedGoogle Scholar
• Ehlers, A. (2020). Cognitive therapy. In D. Forbes, J. I. Bisson, C. M. Monson, & L. Berliner (Eds.), Effective Treatments for PTSD 3rd ed. (pp. 255–271). Guilford Publications.
   Google Scholar
• Ehlers, A., & Clark, D. M. (2000). A cognitive model of posttraumatic stress disorder. Behaviour Research and Therapy, 38(4), 319–345. https://doi.org/10.1016/S0005-7967(99)00123-0
   PubMed Web of Science ®Google Scholar
• Ehlers, A., Grey, N., Wild, J., Stott, R., Liness, S., Deale, A., Handley, R., Albert, I., Cullen, D., Hackmann, A., Manley, J., McManus, F., Brady, F., Salkovskis, P., & Clark, D. M. (2013). Implementation of cognitive therapy for PTSD in routine clinical care: Effectiveness and moderators of outcome in a consecutive sample. Behaviour Research and Therapy, 51(11), 742–752. https://doi.org/10.1016/j.brat.2013.08.006
   PubMed Web of Science ®Google Scholar
• Ehlers, A., & Wild, J. (2015). Cognitive therapy for PTSD: Updating memories and meanings of trauma. In U. Schnyder, & M. Cloitre (Eds.), Evidence Based Treatments for Trauma-Related Psychological Disorders (pp. 161–187). Springer.
   Google Scholar
• Goodman, L. A., Corcoran, C., Turner, K., Yuan, N., & Green, B. L. (1998). Assessing traumatic event exposure: General issues and preliminary findings for the stressful life events screening questionnaire. Journal of Traumatic Stress, 11(3), 521–542. https://doi.org/10.1023/A:1024456713321
   PubMed Web of Science ®Google Scholar
• Hem, C., Hussain, A., Wentzel-Larsen, T., & Heir, T. (2012). The Norwegian version of the PTSD checklist (PCL): construct validity in a community sample of 2004 tsunami survivors. Nordic Journal of Psychiatry, 66(5), 355–359. https://doi.org/10.3109/08039488.2012.655308
   PubMed Web of Science ®Google Scholar
• Herman, J. L. (1992). Complex PTSD: A syndrome in survivors of prolonged and repeated trauma. Journal of Traumatic Stress, 5(3), 377–391. https://doi.org/10.1002/jts.2490050305
   Web of Science ®Google Scholar
• Hoeboer, C. M., de Kleine, R. A., Oprel, D. A. C., Schoorl, M., van der Does, W., & van Minnen, A. (2021). Does complex PTSD predict or moderate treatment outcomes of three variants of exposure therapy? Journal of Anxiety Disorders, 80), https://doi.org/10.1016/j.janxdis.2021.102388
   PubMed Web of Science ®Google Scholar
• Imel, Z. E., Laska, K., Jakupcak, M., & Simpson, T. L. (2013). Meta-Analysis of dropout in treatments for posttraumatic stress disorder. Journal of Consulting and Clinical Psychology, https://doi.org/10.1037/a0031474
   Web of Science ®Google Scholar
• Karatzias, T., & Cloitre, M. (2019). Treating adults With complex posttraumatic stress disorder using a modular approach to treatment: Rationale, evidence, and directions for future research. Journal of Traumatic Stress, 32(6), 870–876. https://doi.org/10.1002/jts.22457
   PubMed Web of Science ®Google Scholar
• Kessler, R. C., Chiu, W. T., Demler, O., Merikangas, K. R., & Walters, E. E. (2005). Prevalence, severity, and comorbidity of 12-month DSM-IV disorders in the national comorbidity survey replication. Archives of General Psychiatry, 62(6), 617–627. https://doi.org/10.1001/archpsyc.62.6.617
   PubMed Web of Science ®Google Scholar
• Koenen, K. C., Ratanatharathorn, A., Ng, L., McLaughlin, K. A., Bromet, E. J., Stein, D. J., Karam, E. G., Ruscio, A. M., Benjet, C., Scott, K., & Atwoli, L. (2017). Posttraumatic stress disorder in the world mental health surveys. Psychological Medicine, 47(13), 2260–2274. https://doi.org/10.1017/S0033291717000708
   PubMed Web of Science ®Google Scholar
• Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2001). The PHQ-9. Journal of General Internal Medicine, 16(9), 606–613. https://doi.org/10.1046/j.1525-1497.2001.016009606.x
   PubMed Web of Science ®Google Scholar
• Lassemo, E., Sandanger, I., Nygård, J. F., & Sørgaard, K. W. (2017). The epidemiology of post-traumatic stress disorder in Norway: Trauma characteristics and pre-existing psychiatric disorders. Social Psychiatry and Psychiatric Epidemiology, 52(1), 11–19. https://doi.org/10.1007/s00127-016-1295-3
   PubMed Web of Science ®Google Scholar
• Lewis, C., Roberts, N. P., Andrew, M., Starling, E., & Bisson, J. I. (2020). Psychological therapies for post-traumatic stress disorder in adults: Systematic review and meta-analysis. European Journal of Psychotraumatology, 11(1), 1729633. https://doi.org/10.1080/20008198.2020.1729633
   PubMed Web of Science ®Google Scholar
• Maguen, S., Madden, E., Patterson, O. V., DuVall, S. L., Goldstein, L. A., Burkman, K., & Shiner, B. (2018). Measuring Use of evidence based psychotherapy for posttraumatic stress disorder in a large national healthcare system. Administration and Policy in Mental Health and Mental Health Services Research, 45(4), 519–529. https://doi.org/10.1007/s10488-018-0850-5
   PubMed Web of Science ®Google Scholar
• Mavranezouli, I., Megnin-Viggars, O., Grey, N., Bhutani, G., Leach, J., Daly, C., Dias, S., Welton, N. J., Katona, C., El-Leithy, S., Greenberg, N., Stockton, S., & Pilling, S. (2020). Cost-effectiveness of psychological treatments for post-traumatic stress disorder in adults. Plos One, 15(4), e0232245. https://doi.org/10.1371/journal.pone.0232245
   PubMed Web of Science ®Google Scholar
• McHugh, R. K., & Barlow, D. H. (2010). The dissemination and implementation of evidence-based psychological treatments: A review of current efforts. American Psychologist, 65(2), 73–84. https://doi.org/10.1037/a0018121
   PubMed Web of Science ®Google Scholar
• Murray, H. (2017). Evaluation of a trauma-focused CBT training programme for IAPT services. Behavioural and Cognitive Psychotherapy, 1–16. https://doi.org/10.1017/S1352465816000606
   Google Scholar
• National Institute for Health and Care Excellence. (2018). Post-traumatic stress disorder. NICE. https://www.nice.org.uk/guidance/ng116/resources/posttraumatic-stress-disorder-pdf-66141601777861.
   Google Scholar
• Rakovshik, S. G., & McManus, F. (2010). Establishing evidence-based training in cognitive behavioral therapy: A review of current empirical findings and theoretical guidance. Clinical Psychology Review, 30(5), 496–516. https://doi.org/10.1016/j.cpr.2010.03.004
   PubMed Web of Science ®Google Scholar
• Riggs, D. S., Willing, M. M. P., Mallonee, S., Rosen, C., Stirman, S. W., & Dorsey, S. (2020). Training and implementation of evidence–based psychotherapies for PTSD. In Effective Treatments for PTSD: Practice Guidelines from the International Society for Traumatic Stress Studies, 3rd ed (pp. 469–491. The Guilford Press.
   Google Scholar
• Rosen, C. S., Matthieu, M. M., Wiltsey Stirman, S., Cook, J. M., Landes, S., Bernardy, N. C., Chard, K. M., Crowley, J., Eftekhari, A., Finley, E. P., & Hamblen, J. L. (2016). A review of studies on the system-wide implementation of evidence-based psychotherapies for posttraumatic stress disorder in the veterans health administration. Administration and Policy in Mental Health and Mental Health Services Research, 43(6), 957–977. https://doi.org/10.1007/s10488-016-0755-0
   PubMed Web of Science ®Google Scholar
• Sele, P., Hoffart, A., Bækkelund, H., & Øktedalen, T. (2020). Psychometric properties of the international trauma questionnaire (ITQ) examined in a Norwegian trauma-exposed clinical sample. European Journal of Psychotraumatology, 11(1), 1796187. https://doi.org/10.1080/20008198.2020.1796187
   PubMed Web of Science ®Google Scholar
• Shapiro, F. (2001). Eye Movement Desensitization and Reprocessing. Guildford Press.
   Google Scholar
• Shapiro, F., & Laliotis, D. (2015). EMDR therapy for trauma-related disorders. In U. Schnyder, & M. Cloitre (Eds.), Evidence Based Treatments for Trauma-Related Psychological Disorders (pp. 205–228). Springer.
   Google Scholar
• Shapiro, F., Russel, M. C., Lee, C., & Schubert, S. J. (2020). Eye movement desensitization and reprocessing therapy. In D. Forbes, J. I. Bisson, C. M. Monson, & L. Berliner (Eds.), Effective Treatments for PTSD Third edition (pp. 234–254). Guildford Press.
   Google Scholar
• Skar, A.-M. S., Braathu, N., Peters, N., Bækkelund, H., Endsjø, M., Babaii, A., Borge, R. H., Wentzel-Larsen, T., Ehrhart, M. G., Sklar, M., Brown, C. H., Aarons, G. A., & Egeland, K. M. (2022). A stepped-wedge randomized trial investigating the effect of the leadership and organizational change for implementation (LOCI) intervention on implementation and transformational leadership, and implementation climate. BMC Health Services Research, 22(1), 298. https://doi.org/10.1186/s12913-022-07539-9
   PubMed Web of Science ®Google Scholar
• Spitzer, R. L., Kroenke, K., Williams, J. B. W., & Löwe, B. (2006). A brief measure for assessing generalized anxiety disorder. Archives of Internal Medicine, 166(10), 1092–1097. https://doi.org/10.1001/archinte.166.10.1092
   PubMed Web of Science ®Google Scholar
• van den Berg, D. P. G., de Bont, P. A. J. M., van der Vleugel, B. M., de Roos, C., de Jongh, A., van Minnen, A., & van der Gaag, M. (2016). Trauma-Focused treatment in PTSD patients With psychosis: Symptom exacerbation, adverse events, and revictimization. Schizophrenia Bulletin, 42(3), 693–702. https://doi.org/10.1093/schbul/sbv172
   PubMed Web of Science ®Google Scholar
• Voorendonk, E. M., De Jongh, A., Rozendaal, L., & Van Minnen, A. (2020). Trauma-focused treatment outcome for complex PTSD patients: Results of an intensive treatment programme. European Journal of Psychotraumatology, 11(1), 1783955. https://doi.org/10.1080/20008198.2020.1783955
   PubMed Web of Science ®Google Scholar
• Weathers, F. W., Litz, B. T., Keane, T. M., Palmieri, P. A., Marx, B. P., & Schnurr, P. P. (2013). The PTSD Checklist for DSM-5 (PCL-5). National Center for PTSD. www.ptsd.va.gov.
   Google Scholar
• World Health Organization. (2019). International Classification of Diseases, Eleventh Revision (ICD-11). World Health Organization. https://icd.who.int/browse11.
   Google Scholar