1American Psychiatric Association (APA). Diagnostic and Statistical Manual of Mental Disorders (5th edn). APA, 2013.
2Kessler, RC, Ustun, TB. The WHO World Mental Health Surveys: Global Perspectives on the Epidemiology of Mental Disorders. Cambridge University Press, 2008.
3Dückers, ML, Alisic, E, Brewin, CR. A vulnerability paradox in the cross-national prevalence of post-traumatic stress disorder. Br J Psychiatry 2016; 209: 300–5.
6Amstadter, AB, Aggen, SH, Knudsen, GP, Reichborn-Kjennerud, T, Kendler, KS. Potentially traumatic event exposure, posttraumatic stress disorder, and Axis I and II comorbidity in a population-based study of Norwegian young adults. Soc Psychiatry Psychiatr Epidemiol 2013; 48: 215–23.
7Lassemo, E, Sandanger, I, Nygård, JF, Sørgaard, KW. The epidemiology of post-traumatic stress disorder in Norway: trauma characteristics and pre-existing psychiatric disorders. Soc Psychiatry Psychiatr Epidemiol 2017; 52: 11–9.
8Kessler, RC, Aguilar-Gaxiola, S, Alonso, J, Benjet, C, Bromet, EJ, Cardoso, G, et al. Trauma and PTSD in the WHO World Mental Health Surveys. Eur J Psychotraumatol 2017; 8: 1353383.
9Richardson, LK, Frueh, C, Acierno, R. Prevalence estimates of combat-related PTSD: a critical review. Aust N Z J Psychiatry 2010; 44: 4–19.
10Streiner, DL, Patten, SB, Anthony, JC, Cairney, J. Has ‘lifetime prevalence’ reached the end of its life? An examination of the concept. Int J Methods Psychiatr Res 2009; 18: 221–8.
11Schou-Bredal, I, Heir, T, Skogstad, L, Bonsaksen, T, Lerdal, A, Grimholt, T, et al. Population-based norms of the Life Orientation Test–Revised (LOT-R). Int J Clin Health Psychol 2017; 17: 216–24.
12Bonsaksen, T, Grimholt, TK, Skogstad, L, Lerdal, A, Ekeberg, Ø, Heir, T, et al. Self-diagnosed depression in the Norwegian general population - associations with neuroticism, extraversion, optimism, and general self-efficacy. BMC Public Health 2018; 18: 1076.
13Weathers, FW, Blake, DD, Schnurr, PP, Kaloupek, DG, Marx, BP, Keane, TM. , 2013 (https://www.ptsd.va.gov/professional/assessment/te-measures/life_events_checklist.asp).
14Silverstein, MW, Lee, DJ, Witte, TK, Weathers, FW. Is posttraumatic growth trauma-specific? Invariance across trauma- and stressor-exposed groups. Psychol Trauma 2017; 9: 553–60.
15Gray, MJ, Litz, BT, Hsu, JL, Lombardo, TW. Psychometric properties of the Life Events Checklist. Assessment 2004; 11: 330–41.
16Blevins, CA, Weathers, FW, Davis, MT, Witte, TK, Domino, JL. The Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5): development and initial psychometric evaluation. J Trauma Stress 2015; 28: 489–98.
17Ashbaugh, AR, Houle-Johnson, S, Herbert, C, El-Hage, W, Brunet, A. Psychometric validation of the English and French versions of the Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5). PLoS ONE 2016; 11(10): e0161645.
18Vijver, F, Hambleton, RK. Translating tests: some practical guidelines. Eur Psychol 1996; 1: 89–90.
19Sveen, J, Bondjers, K, Willebrand, M. Psychometric properties of the PTSD Checklist for DSM-5: a pilot study. Eur J Psychotraumatol 2016; 7: 30165.
20Benjet, C, Bromet, E, Karam, EG, Kessler, RC, McLaughlin, KA, Ruscio, AM, et al. The epidemiology of traumatic event exposure worldwide: results from the World Mental Health Survey Consortium. Psychol Med 2016; 46: 327–43.
21Chapman, C, Mills, K, Slade, T, McFarlane, AC, Bryant, RA, Creamer, M, et al. Remission from post-traumatic stress disorder in the general population. Psychol Med 2012; 42: 1695–703.
22Van Ameringen, M, Mancini, C, Patterson, B, Boyle, MH. Post-traumatic stress disorder in Canada. CNS Neurosci Ther 2008; 14: 171–81.
23Frans, Ö, Rimmö, PA, Åberg, L, Fredrikson, M. Trauma exposure and post-traumatic stress disorder in the general population. Acta Psychiatr Scand 2005; 111: 291–9.
24De Vries, GJ, Olff, M. The lifetime prevalence of traumatic events and posttraumatic stress disorder in the Netherlands. J Trauma Stress 2009; 22: 259–67.
27Florescu, S, Mihaescu-Pintia, C, Ciutan, M, Sasu, C, Gălăon, M. Trauma and posttraumatic stress disorder in Romania. Eur J Public Health 2014; 24: cku166–158.
28Borges, G, Benjet, C, Petukhova, M, Medina-Mora, ME. Posttraumatic stress disorder in a nationally representative Mexican community sample. J Trauma Stress 2014; 27: 323–30.
29Karam, ÃG, Mneimneh, ZN, Dimassi, H, Fayyad, JA, Karam, AN, Nasser, SC, et al. Lifetime prevalence of mental disorders in Lebanon: first onset, treatment, and exposure to war. PLoS Med 2008; 5: e61.
30Heir, T, Blix, I, Knatten, CK. Thinking that one's life was in danger: perceived life threat in individuals directly or indirectly exposed to terror. Br J Psychiatry 2016; 209: 306–10.
31Giosan, C, Malta, L, Jayasinghe, N, Spielman, L, Difede, J. Relationships between memory inconsistency for traumatic events following 9/11 and PTSD in disaster restoration workers. J Anxiety Disord 2009; 23: 557–61.
32Heir, T, Piatigorsky, A, Weisæth, L. Longitudinal changes in recalled perceived life threat after a natural disaster. Br J Psychiatry 2009; 194: 510–4.
33Schaeffer, NC. Asking questions about threatening topics: a selective overview. In The Science of Self-Report: Implications for Research and Practice (eds Stone, AA, Turkkan, JS, Bachrach, CA, Jobe, JB, Kurtzman, HS, Cain, VS): 105–21. Lawrence Erlbaum Associates, 2000.
34Thoresen, S, Myhre, M, Wentzel-Larsen, T, Aakvaag, HF, Hjemdal, OK. Violence against children, later victimisation, and mental health: a cross-sectional study of the general Norwegian population. Eur J Psychotraumatol 2015; 6: 26259.
38Morina, N, Wicherts, JM, Lobbrecht, J, Priebe, S. Remission from post-traumatic stress disorder in adults: a systematic review and meta-analysis of long term outcome studies. Clin Psychol Rev 2014; 34: 249–55.
39Oakley-Browne, MA, Wells, JE, Scott, KM. Te Rau Hinengaro: the New Zealand Mental Health Survey. In The WHO World Mental Health Surveys: Global Perspectives on the Epidemiology of Mental Disorders (eds Kessler, RC, Ustun, TB): 486–508. Cambridge University Press, 2008.
40Kessler, RC, Berglund, PA, Demler, O, Jin, R, Merikangas, KR, Walters, EE. Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication. Arch Gen Psychiatry 2005; 62: 593–602.
41Belli, RF. Autobiographical memory dynamics in survey research. In The SAGE Handbook of Applied Memory (eds Perfect, TJ, Lindsay, DS): 366–84. SAGE Publications; 2014.
42Ehlers, A, Clark, DM. A cognitive model of posttraumatic stress disorder. Behav Res Ther 2000; 38: 319–45.
43Rose, G. The Strategy of Preventive Medicine. Oxford University Press, 1992.
44Rose, G. Sick individuals and sick populations. Int J Epidemiol 2001; 30: 427–32.
45Rubin, DC, Berntsen, D, Bohni, MK. A memory-based model of posttraumatic stress disorder: evaluating basic assumptions underlying the PTSD diagnosis. Psychol Rev 2008; 115: 985–1011.
46Berntsen, D, Rubin, DC. When a trauma becomes a key to identity: enhanced integration of trauma memories predicts posttraumatic stress disorder symptoms. Appl Cogn Psychol 2007; 21: 417–31.
47Blix, I, Solberg, O, Heir, T. Centrality of event and symptoms of posttraumatic stress disorder after the 2011 Oslo bombing attack. Appl Cogn Psychol 2014; 28: 249–53.
48Blix, I, Birkeland, MS, Solberg, Ø, Hansen, MB, Heir, T. The launching and ensnaring effects of construing a traumatic event as central to one's identity and life story. Appl Cogn Psychol 2016; 30: 526–31.
49Shultz, JM, Thoresen, S, Galea, S. The Las Vegas shootings – underscoring key features of the firearm epidemic. JAMA 2017; 318: 1753–4.
50Kristensen, P, Dyregrov, A, Weisæth, L, Straume, M, Dyregrov, K, Heir, T, et al. Optimizing visits to the site of death for bereaved families after disasters and terrorist events. Disaster Med Public Health Prep 2018; 12: 523–7.
51Hussain, A, Weisæth, L, Heir, T. Non-response to a population based post disaster questionnaire study. J Trauma Stress 2009; 22: 324–8.
52Hem, C, Hussain, A, Wentzel-Larsen, T, Heir, T. The Norwegian version of the PTSD Checklist (PCL); construct validity in a community sample of 2004 tsunami survivors. Nord J Psychiatry 2012; 66: 355–9.
53Hussain, A, Weisæth, L, Heir, T. Psychiatric disorders and functional impairment among disaster victims after exposure to a natural disaster – a population based study. J Affect Disord 2011; 128: 135–41.
54van Giezen, AE, Arensman, E, Spinhoven, P, Wolters, G. Consistency of memory for emotionally arousing events: a review of prospective and experimental studies. Clin Psychol Rev 2005; 25: 935–53.