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Published in: Social Psychiatry and Psychiatric Epidemiology 6/2011

01-06-2011 | Original Paper

Psychoses, PTSD, and depression in Somali refugees in Minnesota

Authors: Jerome Kroll, Ahmed Ismail Yusuf, Koji Fujiwara

Published in: Social Psychiatry and Psychiatric Epidemiology | Issue 6/2011

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Abstract

Introduction

Initial clinical observation of Somali patients seen at a busy inner-city community clinic (CUHCC) suggested that, in addition to the expected pictures of Posttraumatic Stress Disorder (PTSD) and depression previously seen in the clinic’s Southeast Asian refugee population from 1980 to 2000, there was an unusually high number of young Somali men presenting with acute psychotic disturbances.

Objectives

The aim of this study of health care utilization of Somali refugees (N = 600) seen in the mental health unit of the clinic from 2001 to 2009 was to investigate the major patterns of psychiatric disorders in this outpatient population and compare these findings with a cohort of non-Somali patients (N = 3,009) seen at the same outpatient clinic during the years 2007–2009. If the results supported the initial clinical observations that the rate of psychoses was higher among young Somali men than non-Somali men attending CUHCC clinic, then several areas of further research would recommend itself. First, since this study was not a study of prevalence of mental illness in the Somali community, the next step would be to undertake a study of community prevalence of mental illness among different age and gender cohorts. Second, further research should look into likely causative and contributory risk factors to explain the development of psychoses among Somali young men.

Methods

Somali and non-Somali patients were diagnosed according to DSM-IV-R criteria. Main outcome measures (diagnoses, age cohort, sex) were analyzed by Chi-square tests. Patterns of illness and adjustment varied significantly by age and gender cohorts, reflecting the relevance of age and gender at time of trauma on different trauma and loss experiences and cultural and religious shaping of subsequent adjustment and symptoms.

Results

The study confirmed that almost half of the Somali male patients are under age 30, 80% of whom presented with psychoses, compared with the rate of psychosis (13.7%) in the non-Somali control group of same-aged males at the clinic. The older male, and the majority of Somali female patients, show predominantly depressive and PTSD symptomatology.

Conclusions

War trauma experienced in childhood, early malnutrition from famines, head trauma, and excess Khat use in male adolescents provide partial explanations for the large number of young psychotic Somali men seen in the clinic from 2001 to 2009.
Literature
2.
go back to reference Lewis IM (2002) A modern history of the Somali, 4th edn. Ohio University Press, Athens Lewis IM (2002) A modern history of the Somali, 4th edn. Ohio University Press, Athens
3.
go back to reference Besteman C (1999) Unraveling Somalia: race, violence and the legacy of slavery. University of Pennsylvania Press, Philadelphia Besteman C (1999) Unraveling Somalia: race, violence and the legacy of slavery. University of Pennsylvania Press, Philadelphia
4.
go back to reference Feyissa AM, Kelly JP (2008) A review of the neuropharmacological properties of khat. Prog Neuropsychopharmacol Biol Psychiatry 32:1147–1166PubMedCrossRef Feyissa AM, Kelly JP (2008) A review of the neuropharmacological properties of khat. Prog Neuropsychopharmacol Biol Psychiatry 32:1147–1166PubMedCrossRef
5.
go back to reference Al-Motarreb A, Baker K, Broadley KJ (2002) Khat: pharmacological and medical aspects and its social use in Yemen. Phytother Res 16:403–413PubMedCrossRef Al-Motarreb A, Baker K, Broadley KJ (2002) Khat: pharmacological and medical aspects and its social use in Yemen. Phytother Res 16:403–413PubMedCrossRef
6.
go back to reference Cox G, Rampes H (2003) Adverse effects of khat: a review. Adv Psychiatr Treat 9:456–463CrossRef Cox G, Rampes H (2003) Adverse effects of khat: a review. Adv Psychiatr Treat 9:456–463CrossRef
7.
go back to reference Anthony C (2009) Africa’s displaced peoples: State-building realpolitik and stunted globalization. Harvard Int Rev 31(3):50–54 Anthony C (2009) Africa’s displaced peoples: State-building realpolitik and stunted globalization. Harvard Int Rev 31(3):50–54
9.
go back to reference Al-Saffar S, Borga P, Edman G, Hallstrom T (2003) The aetiology of posttraumatic stress disorder in four ethnic groups in outpatient psychiatry. Soc Psychiatry Psychiatr Epidemiol 38:456–462PubMedCrossRef Al-Saffar S, Borga P, Edman G, Hallstrom T (2003) The aetiology of posttraumatic stress disorder in four ethnic groups in outpatient psychiatry. Soc Psychiatry Psychiatr Epidemiol 38:456–462PubMedCrossRef
10.
go back to reference Yeomans PD, Herbert JD, Forman EM (2008) Symptom comparison across multiple solicitation methods among Burundians with traumatic event histories. J Trauma Stress 21:231–234PubMedCrossRef Yeomans PD, Herbert JD, Forman EM (2008) Symptom comparison across multiple solicitation methods among Burundians with traumatic event histories. J Trauma Stress 21:231–234PubMedCrossRef
11.
go back to reference Ichikawa M, Nakahara S, Wakai S (2006) Cross-cultural use of the predetermined scale cutoff points in refugee mental health research. Soc Psychiatry Psychiatr Epidemiol 41:248–250PubMedCrossRef Ichikawa M, Nakahara S, Wakai S (2006) Cross-cultural use of the predetermined scale cutoff points in refugee mental health research. Soc Psychiatry Psychiatr Epidemiol 41:248–250PubMedCrossRef
12.
go back to reference Bhui K, Abdi A, Abdi M, Pereira S, Dualeh M, Robertson D, Sathyamoorthy G, Ismail H (2003) Traumatic events, migration characteristics and psychiatric symptoms among Somali refugees. Soc Psychiatry Psychiatr Epidemiol 38:35–43PubMedCrossRef Bhui K, Abdi A, Abdi M, Pereira S, Dualeh M, Robertson D, Sathyamoorthy G, Ismail H (2003) Traumatic events, migration characteristics and psychiatric symptoms among Somali refugees. Soc Psychiatry Psychiatr Epidemiol 38:35–43PubMedCrossRef
13.
go back to reference Kroll J (2003) Posttraumatic symptoms and the complexity of responses to trauma. JAMA 290:667–670PubMedCrossRef Kroll J (2003) Posttraumatic symptoms and the complexity of responses to trauma. JAMA 290:667–670PubMedCrossRef
14.
go back to reference Briggs L, Macleod AD (2006) Demoralisation—a useful conceptualization of non-specific psychological distress among refugees attending mental health services. Int J Soc Psychiatry 52:512–524PubMedCrossRef Briggs L, Macleod AD (2006) Demoralisation—a useful conceptualization of non-specific psychological distress among refugees attending mental health services. Int J Soc Psychiatry 52:512–524PubMedCrossRef
15.
go back to reference Scuglik DL, Alarcon RD, Lapeyre AC, Williams MD, Logan KM (2007) When the poetry no longer rhymes: mental health issues among Somali immigrants in the USA. Transcult Psychiatry 44:581–595PubMedCrossRef Scuglik DL, Alarcon RD, Lapeyre AC, Williams MD, Logan KM (2007) When the poetry no longer rhymes: mental health issues among Somali immigrants in the USA. Transcult Psychiatry 44:581–595PubMedCrossRef
16.
go back to reference Kroll J, Habenicht M, Mackenzie T, Yang M, Chan S, Vang T, Nguyen T, Ly M, Phommasouvanh B, Nguyen H, Vang Y, Cabugao R (1989) Depression and post-traumatic stress disorder in Southeast Asian refugees. Am J Psychiatry 146:1592–1597PubMed Kroll J, Habenicht M, Mackenzie T, Yang M, Chan S, Vang T, Nguyen T, Ly M, Phommasouvanh B, Nguyen H, Vang Y, Cabugao R (1989) Depression and post-traumatic stress disorder in Southeast Asian refugees. Am J Psychiatry 146:1592–1597PubMed
17.
go back to reference Ellis BH, MacDonald HZ, Lincoln AK, Cabral HJ (2008) Mental health of Somali adolescent refugees: the role of trauma, stress, and perceived discrimination. J Consult Clin Psychol 76:184–193PubMedCrossRef Ellis BH, MacDonald HZ, Lincoln AK, Cabral HJ (2008) Mental health of Somali adolescent refugees: the role of trauma, stress, and perceived discrimination. J Consult Clin Psychol 76:184–193PubMedCrossRef
18.
go back to reference Odenwald M, Schauer M, Neuner F, Lingenfelder B, Horn R, Catani C, Klaschik C, Elbert T (2002) War trauma, Khat abuse and psychosis: mental health in the demobilization and reintegration program Somaliland. Final Report of the vivo mission 2 within the EC/GTZ, Sept–Nov. http://www.vivo.org. Accessed 27 August 2006 Odenwald M, Schauer M, Neuner F, Lingenfelder B, Horn R, Catani C, Klaschik C, Elbert T (2002) War trauma, Khat abuse and psychosis: mental health in the demobilization and reintegration program Somaliland. Final Report of the vivo mission 2 within the EC/GTZ, Sept–Nov. http://​www.​vivo.​org. Accessed 27 August 2006
21.
go back to reference Odenwald M, Hinkle H, Schauer E, Schauer M, Elbert TR, Neuner F, Rockstroh B (2009) Use of khat and posttraumatic stress disorder as risk factors for psychotic symptoms: a study of Somali combatants. Soc Sci Med 69:1040–1048PubMedCrossRef Odenwald M, Hinkle H, Schauer E, Schauer M, Elbert TR, Neuner F, Rockstroh B (2009) Use of khat and posttraumatic stress disorder as risk factors for psychotic symptoms: a study of Somali combatants. Soc Sci Med 69:1040–1048PubMedCrossRef
22.
go back to reference Bhui K, Craig T, Mohamud S, Warfa N, Standfeld SA, Thornicroft G, Curtis S, McCrone P (2006) Mental disorders among Somali refugees: developing culturally appropriate measures and assessing socio-cultural risk factors. Soc Psychiatry Psychiatr Epidemiol 41:400–408PubMedCrossRef Bhui K, Craig T, Mohamud S, Warfa N, Standfeld SA, Thornicroft G, Curtis S, McCrone P (2006) Mental disorders among Somali refugees: developing culturally appropriate measures and assessing socio-cultural risk factors. Soc Psychiatry Psychiatr Epidemiol 41:400–408PubMedCrossRef
23.
go back to reference Mavreas V, Bebbington P (1989) Does the act of immigration provoke psychiatric breakdown? A study of Greek Cypriote immigrants. Acta Psychiatrica Scand 80:469–473CrossRef Mavreas V, Bebbington P (1989) Does the act of immigration provoke psychiatric breakdown? A study of Greek Cypriote immigrants. Acta Psychiatrica Scand 80:469–473CrossRef
24.
go back to reference Selten JP, Sijben N (1994) First admission rates for schizophrenia in immigrants to the Netherlands: the Dutch National Registrar. Soc Psychiatry Psychiatr Epidemiol 29:71–77PubMed Selten JP, Sijben N (1994) First admission rates for schizophrenia in immigrants to the Netherlands: the Dutch National Registrar. Soc Psychiatry Psychiatr Epidemiol 29:71–77PubMed
25.
go back to reference Cantor-Graae E, Pedersen CB, McNeil TF, Mortensen PB (2003) Migration as a risk factor for schizophrenia: a Danish population based cohort study. Br J Psychiatry 182:117–122PubMedCrossRef Cantor-Graae E, Pedersen CB, McNeil TF, Mortensen PB (2003) Migration as a risk factor for schizophrenia: a Danish population based cohort study. Br J Psychiatry 182:117–122PubMedCrossRef
26.
go back to reference Leao TS, Sundquist J, Frank G, Johansson L-M, Johansson E-S, Sundquist K (2006) Incidence of schizophrenia or other psychoses in first-and second-generation immigrants, a national cohort study. J Nerv Ment Dis 194:27–33PubMedCrossRef Leao TS, Sundquist J, Frank G, Johansson L-M, Johansson E-S, Sundquist K (2006) Incidence of schizophrenia or other psychoses in first-and second-generation immigrants, a national cohort study. J Nerv Ment Dis 194:27–33PubMedCrossRef
27.
go back to reference Coid JW, Kirkbride JB, Barker D, Cowden F, Stamps R, Yang M, Jones PB (2008) Raised incidence rates of all psychoses among migrant groups. Arch Gen Psychiatry 65:1250–1258PubMedCrossRef Coid JW, Kirkbride JB, Barker D, Cowden F, Stamps R, Yang M, Jones PB (2008) Raised incidence rates of all psychoses among migrant groups. Arch Gen Psychiatry 65:1250–1258PubMedCrossRef
28.
go back to reference Lataster T, Van Os J, Drukker M, Henquet C, Feron F, Gunther N, Myin-Germeys I (2006) Childhood victimization and developmental expression of non-clinical delusional ideation and hallucinatory experiences: victimization and non-clinical psychotic experiences. Social Psychiatry Psychiatr Epidemiol 41:423–428CrossRef Lataster T, Van Os J, Drukker M, Henquet C, Feron F, Gunther N, Myin-Germeys I (2006) Childhood victimization and developmental expression of non-clinical delusional ideation and hallucinatory experiences: victimization and non-clinical psychotic experiences. Social Psychiatry Psychiatr Epidemiol 41:423–428CrossRef
29.
go back to reference Kilcommons AM, Morrison AP (2005) Relationships between trauma and psychosis: an exploration of cognitive and dissociative factors. Acta Psychiatr Scand 112:351–359PubMedCrossRef Kilcommons AM, Morrison AP (2005) Relationships between trauma and psychosis: an exploration of cognitive and dissociative factors. Acta Psychiatr Scand 112:351–359PubMedCrossRef
30.
go back to reference Shevlin M, Dorahy MJ, Adamson G (2007) Trauma and psychosis: an analysis of the National Comorbidity Study. Am J Psychiatry 164:166–169PubMedCrossRef Shevlin M, Dorahy MJ, Adamson G (2007) Trauma and psychosis: an analysis of the National Comorbidity Study. Am J Psychiatry 164:166–169PubMedCrossRef
31.
go back to reference Moore THM, Zammit S, Lingford-Hughes A, Barnes TRE, Jones PB, Burke M, Lewis G (2007) Cannabis use and risk of psychotic or affective mental health outcomes: a systematic review. Lancet 370:319–328PubMedCrossRef Moore THM, Zammit S, Lingford-Hughes A, Barnes TRE, Jones PB, Burke M, Lewis G (2007) Cannabis use and risk of psychotic or affective mental health outcomes: a systematic review. Lancet 370:319–328PubMedCrossRef
32.
go back to reference Degenhardt L, Hall W (2006) Is cannabis use a contributory cause of psychosis? Can J Psychiatry 51:556–565PubMed Degenhardt L, Hall W (2006) Is cannabis use a contributory cause of psychosis? Can J Psychiatry 51:556–565PubMed
33.
go back to reference Degenhardt L, Tennant C, Gilmour S, Schofield D, Nash L, Hall W, McKay D (2007) The temporal dynamics of relationships between cannabis, psychosis and depression among young adults with psychotic disorders: findings from a 10-month prospective study. Psychol Med 37:927–934PubMedCrossRef Degenhardt L, Tennant C, Gilmour S, Schofield D, Nash L, Hall W, McKay D (2007) The temporal dynamics of relationships between cannabis, psychosis and depression among young adults with psychotic disorders: findings from a 10-month prospective study. Psychol Med 37:927–934PubMedCrossRef
34.
go back to reference Henquet C, Krabbendam L, Spauwen J, Kaplan C, Lieb R, Wittchen H-U, van Os J (2005) Prospective cohort study of cannabis use, predisposition for psychosis, and psychotic symptoms in young people. Br Med J 330:11–14CrossRef Henquet C, Krabbendam L, Spauwen J, Kaplan C, Lieb R, Wittchen H-U, van Os J (2005) Prospective cohort study of cannabis use, predisposition for psychosis, and psychotic symptoms in young people. Br Med J 330:11–14CrossRef
35.
go back to reference Schweinsburg AD, Brown SA, Tapert SF (2008) The influence of marijuana use on neurocognitive functioning in adolescents. Curr Drug Abuse Rev 1:99–111PubMed Schweinsburg AD, Brown SA, Tapert SF (2008) The influence of marijuana use on neurocognitive functioning in adolescents. Curr Drug Abuse Rev 1:99–111PubMed
36.
go back to reference Warfa N, Klein A, Bhui K, Leavey G, Craig T, Stansfeld A (2007) Khat use and mental illness: a critical review. Soc Sci Med 65:309–318PubMedCrossRef Warfa N, Klein A, Bhui K, Leavey G, Craig T, Stansfeld A (2007) Khat use and mental illness: a critical review. Soc Sci Med 65:309–318PubMedCrossRef
37.
go back to reference Odenwald M (2007) Chronic khat use and psychotic disorder: a review of the literature and future prospects. Sucht 53:9–22 Odenwald M (2007) Chronic khat use and psychotic disorder: a review of the literature and future prospects. Sucht 53:9–22
39.
go back to reference Susser E, Neugebauer R, Hoek HW, Brown AS, Lin S, Labovitz D, Gorman JM (1996) Schizophrenia after prenatal famine. Arch Gen Psychiatry 53:25–31PubMed Susser E, Neugebauer R, Hoek HW, Brown AS, Lin S, Labovitz D, Gorman JM (1996) Schizophrenia after prenatal famine. Arch Gen Psychiatry 53:25–31PubMed
40.
go back to reference St. Clair D, Xu M, Wang P, Yu Y, Fang Y, Zhang F, Zheng X, Gu N, Feng G, Sham P, He L (2005) Rates of adult schizophrenia following prenatal exposure to the Chinese famine of 1959–61. JAMA 294:557–562PubMedCrossRef St. Clair D, Xu M, Wang P, Yu Y, Fang Y, Zhang F, Zheng X, Gu N, Feng G, Sham P, He L (2005) Rates of adult schizophrenia following prenatal exposure to the Chinese famine of 1959–61. JAMA 294:557–562PubMedCrossRef
41.
go back to reference McClennan JM, Susser E, King M-C (2006) Maternal famine, de novo mutations, and schizophrenia. JAMA 296:582–584CrossRef McClennan JM, Susser E, King M-C (2006) Maternal famine, de novo mutations, and schizophrenia. JAMA 296:582–584CrossRef
42.
43.
go back to reference Sargent J, Michael K (2005) The need for a digital aid framework in humanitarian relief. The 9th World Multi-Conference on Systematics, Cybernetics and Informatics, Orlando, FL, 10–13 July 2005. http://ro.uow.edu/infopapers/377. Accessed 26 August 2006 Sargent J, Michael K (2005) The need for a digital aid framework in humanitarian relief. The 9th World Multi-Conference on Systematics, Cybernetics and Informatics, Orlando, FL, 10–13 July 2005. http://​ro.​uow.​edu/​infopapers/​377. Accessed 26 August 2006
45.
go back to reference Patman RG (1997) Disarming Somalia: the contrasting fortunes of US and Australian peacekeepers during UN intervention 1992–93. Afr Aff 96:509–533 Patman RG (1997) Disarming Somalia: the contrasting fortunes of US and Australian peacekeepers during UN intervention 1992–93. Afr Aff 96:509–533
46.
go back to reference Moore PS, Marfin AA, Quenemoen LE, Gessner BD, Ayub YS, Miller DS, Sullivan KM, Toole MJ (1993) Mortality rates in displaced and resident populations of central Somalia during 1992 famine. Lancet 341:935–938PubMedCrossRef Moore PS, Marfin AA, Quenemoen LE, Gessner BD, Ayub YS, Miller DS, Sullivan KM, Toole MJ (1993) Mortality rates in displaced and resident populations of central Somalia during 1992 famine. Lancet 341:935–938PubMedCrossRef
47.
go back to reference Seal AJ, Creeke PI, Mirghani Z, Abdalla F, McBurney RP, Pratt LS, Brookes D, Ruth LJ, Marchand E (2005) Iron and vitamin A deficiency in long-term African refugees. J Nutr 135:808–813PubMed Seal AJ, Creeke PI, Mirghani Z, Abdalla F, McBurney RP, Pratt LS, Brookes D, Ruth LJ, Marchand E (2005) Iron and vitamin A deficiency in long-term African refugees. J Nutr 135:808–813PubMed
48.
go back to reference Collins S, Myatt M (2000) Short-term prognosis in severe adult and adolescent malnutrition during famine. JAMA 284:621–626PubMedCrossRef Collins S, Myatt M (2000) Short-term prognosis in severe adult and adolescent malnutrition during famine. JAMA 284:621–626PubMedCrossRef
49.
go back to reference McGrath J (1999) Hypothesis: is low prenatal vitamin D a risk-modifying factor for schizophrenia? Schizophrenia Res 40:173–177CrossRef McGrath J (1999) Hypothesis: is low prenatal vitamin D a risk-modifying factor for schizophrenia? Schizophrenia Res 40:173–177CrossRef
50.
go back to reference Dealburto MJ (2007) Why are immigrants at increased risk for psychosis? Vitamin D insufficiency, epigenetic mechanisms, or both? Med Hypotheses 68:259–267CrossRef Dealburto MJ (2007) Why are immigrants at increased risk for psychosis? Vitamin D insufficiency, epigenetic mechanisms, or both? Med Hypotheses 68:259–267CrossRef
51.
go back to reference Insel BJ, Schaefer CA, McKeague IW, Susser ES, Brown AS (2008) Maternal iron deficiency and the risk of schizophrenia in offspring. Arch Gen Psychiatry 65:1136–1144PubMedCrossRef Insel BJ, Schaefer CA, McKeague IW, Susser ES, Brown AS (2008) Maternal iron deficiency and the risk of schizophrenia in offspring. Arch Gen Psychiatry 65:1136–1144PubMedCrossRef
52.
go back to reference Onyut LP, Neuner F, Ertl V, Schauer E, Odenwald M, Elbert T (2009) Trauma, poverty and mental health among Somali and Rwandese refugees living in an African refugee settlement––an epidemiological study. Confl Health 3. doi:10.1186/1752-1505-3-6 (electronic version) Onyut LP, Neuner F, Ertl V, Schauer E, Odenwald M, Elbert T (2009) Trauma, poverty and mental health among Somali and Rwandese refugees living in an African refugee settlement––an epidemiological study. Confl Health 3. doi:10.​1186/​1752-1505-3-6 (electronic version)
53.
go back to reference Sheehan DV, Lecrubier Y, Sheehan KH, Amorim P, Janavs J, Weiller E, Hergueta T, Baker R, Dunbar GC (1998) The mini-international neuropsychiatric interview (MINI): the development and validation of a structured diagnostic interview for DSM-IV and ICD-10. J Clin Psychiatry 59(20):22–33PubMed Sheehan DV, Lecrubier Y, Sheehan KH, Amorim P, Janavs J, Weiller E, Hergueta T, Baker R, Dunbar GC (1998) The mini-international neuropsychiatric interview (MINI): the development and validation of a structured diagnostic interview for DSM-IV and ICD-10. J Clin Psychiatry 59(20):22–33PubMed
54.
go back to reference Gerritsen AAM, Bramsen I, Deville W, van Willigen LHM, Hovens JE, vander Ploeg HM (2006) Physical and mental health of Afghan, Iranian, and Somali asylum seekers and refugees living in the Netherlands. Soc Psychiatry Psychiatr Epidemiol 41:18–26PubMedCrossRef Gerritsen AAM, Bramsen I, Deville W, van Willigen LHM, Hovens JE, vander Ploeg HM (2006) Physical and mental health of Afghan, Iranian, and Somali asylum seekers and refugees living in the Netherlands. Soc Psychiatry Psychiatr Epidemiol 41:18–26PubMedCrossRef
55.
go back to reference Silove D, Steel Z, Bauman A, Chey T, McFarlane A (2007) Trauma, PTSD and the longer-term mental health burden amongst Vietnamese refugees. Soc Psychiatry Psychiatr Epidemiol 42:467–476PubMedCrossRef Silove D, Steel Z, Bauman A, Chey T, McFarlane A (2007) Trauma, PTSD and the longer-term mental health burden amongst Vietnamese refugees. Soc Psychiatry Psychiatr Epidemiol 42:467–476PubMedCrossRef
56.
go back to reference Al-Saffar S, Borga P, Hallstrom T (2002) Long-term consequences of unrecognized PTSD in general outpatient psychiatry. Soc Psychiatry Psychiatr Epidemiol 37:580–585PubMedCrossRef Al-Saffar S, Borga P, Hallstrom T (2002) Long-term consequences of unrecognized PTSD in general outpatient psychiatry. Soc Psychiatry Psychiatr Epidemiol 37:580–585PubMedCrossRef
57.
go back to reference Cougnard A, Marcelis M, Myin-Germeys I, De Graaf R, Vollebergh W, Krabbendam L, Lieb R, Wittchen HU, Henquet C, Spauwen J, Van Os J (2007) Does normal developmental expression of psychosis combine with environmental risk to cause persistence of psychosis? A psychosis proneness-persistence model. Psychol Med 37:513–527PubMedCrossRef Cougnard A, Marcelis M, Myin-Germeys I, De Graaf R, Vollebergh W, Krabbendam L, Lieb R, Wittchen HU, Henquet C, Spauwen J, Van Os J (2007) Does normal developmental expression of psychosis combine with environmental risk to cause persistence of psychosis? A psychosis proneness-persistence model. Psychol Med 37:513–527PubMedCrossRef
Metadata
Title
Psychoses, PTSD, and depression in Somali refugees in Minnesota
Authors
Jerome Kroll
Ahmed Ismail Yusuf
Koji Fujiwara
Publication date
01-06-2011
Publisher
Springer-Verlag
Published in
Social Psychiatry and Psychiatric Epidemiology / Issue 6/2011
Print ISSN: 0933-7954
Electronic ISSN: 1433-9285
DOI
https://doi.org/10.1007/s00127-010-0216-0

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