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Otago Medical School staff profiles

Associate Professor Giles Newton-Howes

PositionAssociate Professor
DepartmentDepartment of Psychological Medicine (Wellington)
Research summaryPsychiatry

Research

Giles trained in psychiatry at Imperial College in London, undertaking five years of clinical work in the Hawke's Bay before accepting a role in the Department of Psychological Medicine. He is a general adult consultant psychiatrist with a sub-specialty in substance misuse psychiatry. His research interests include the clinical understanding of personality disorders, particularly as they relate to psychiatric patients and mental state disorder. He is also interested in the interface between psychiatry and society, particularly the application of coercive practices.

Publications

Foulds, J. A., Boden, J. M., McKetin, R., & Newton-Howes, G. (2020). Methamphetamine use and violence: Findings from a longitudinal birth cohort. Drug & Alcohol Dependence, 207, 107826. doi: 10.1016/j.drugalcdep.2019.107826

Oldfield, K., Braithwaite, I., Beasley, R., Eathorne, A., Newton-Howes, G., & Semprini, A. (2020). Medical cannabis: Knowledge and expectations in a cohort of North Island New Zealand general practitioners. New Zealand Medical Journal, 133(1508), 12-28. Retrieved from https://www.nzma.org.nz/journal

Braithwaite, I., Bhagavan, C., Doppen, M., Kung, S., Oldfield, K., & Newton-Howes, G. (2020). Medicinal applications of cannabis/cannabinoids. Current Opinion in Psychology, 38, 1-10. doi: 10.1016/j.copsyc.2020.06.002

Boden, J., Blair, S., & Newton-Howes, G. (2020). Alcohol use in adolescents and adult psychopathology and social outcomes: Findings from a 35-year cohort study. Australian & New Zealand Journal of Psychiatry, 54(9), 909-918. doi: 10.1177/0004867420924091

Hemmati, A., Newton-Howes, G., Falahi, S., Mostafavi, S., Colarusso, C. A., & Komasi, S. (2020). Personality pathology among adults with history of childhood sexual abuse: Study of the relevance of DSM-5 proposed traits and psychobiological features of temperament and character. Indian Journal of Psychological Medicine. Advance online publication. doi: 10.1177/0253717620928813

Chapter in Book - Research

Newton-Howes, G., & Davidson, K. (2009). Management of personality disorder. In M. G. Gelder, N. C. Andreasen, J. J. Lópes-Ibor, Jr & J. R. Geddes (Eds.), New Oxford textbook of psychiatry (Vol. 1). (2nd ed.) (pp. 901-910). Oxford University Press.

Newton-Howes, G., & Tyrer, P. (2009). Personality disorders. In I. M. Salloum & J. E. Mezzich (Eds.), Psychiatric diagnosis: Challenges and prospects. (pp. 135-140). Oxford, UK: Wiley Blackwell.

Newton-Howes, G. (2006). Pharmacology and personality disorders. In M. J. Sampson, R. A. McCubbin & P. Tyrer (Eds.), Personality disorder and community mental health teams: A practitioner's guide. (pp. 143-160). Chichester, UK: John Wiley & Sons.

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Chapter in Book - Other

Newton-Howes, G., & Wood, R. (2015). Cognitive behavioural therapy and the psychopathology of schizophrenia: Systematic review and meta-analysis (Vol. 5). In G. Davey (Ed.), Psychopathology & abnormal psychology. (pp. 47-59). Sage.

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Journal - Research Article

Foulds, J. A., Boden, J. M., McKetin, R., & Newton-Howes, G. (2020). Methamphetamine use and violence: Findings from a longitudinal birth cohort. Drug & Alcohol Dependence, 207, 107826. doi: 10.1016/j.drugalcdep.2019.107826

Hemmati, A., Newton-Howes, G., Falahi, S., Mostafavi, S., Colarusso, C. A., & Komasi, S. (2020). Personality pathology among adults with history of childhood sexual abuse: Study of the relevance of DSM-5 proposed traits and psychobiological features of temperament and character. Indian Journal of Psychological Medicine. Advance online publication. doi: 10.1177/0253717620928813

Boden, J., Blair, S., & Newton-Howes, G. (2020). Alcohol use in adolescents and adult psychopathology and social outcomes: Findings from a 35-year cohort study. Australian & New Zealand Journal of Psychiatry, 54(9), 909-918. doi: 10.1177/0004867420924091

Braithwaite, I., Bhagavan, C., Doppen, M., Kung, S., Oldfield, K., & Newton-Howes, G. (2020). Medicinal applications of cannabis/cannabinoids. Current Opinion in Psychology, 38, 1-10. doi: 10.1016/j.copsyc.2020.06.002

Oldfield, K., Braithwaite, I., Beasley, R., Eathorne, A., Newton-Howes, G., & Semprini, A. (2020). Medical cannabis: Knowledge and expectations in a cohort of North Island New Zealand general practitioners. New Zealand Medical Journal, 133(1508), 12-28. Retrieved from https://www.nzma.org.nz/journal

Newton-Howes, G., Gordon, S., & Fedchuk, D. (2020). Making the World of Difference: A service user-led education programme reshaping the learning environment in psychiatry. Australasian Psychiatry, 28(2), 226-228. doi: 10.1177/1039856219878647

Newton-Howes, G., Cunningham, R., & Atkinson, J. (2020). Personality disorder prevalence and correlates in a whole of nation dataset. Social Psychiatry & Psychiatric Epidemiology. Advance online publication. doi: 10.1007/s00127-020-01876-y

Boden, J. M., Newton-Howes, G., Foulds, J., Spittlehouse, J., & Cook, S. (2019). Trajectories of alcohol use problems based on early adolescent alcohol use: Findings from a 35 year population cohort. International Journal of Drug Policy, 74, 18-25. doi: 10.1016/j.drugpo.2019.06.011

Newton-Howes, G. (2019). Do community treatment orders in psychiatry stand up to principalism: Considerations reflected through the prism of the Convention on the Rights of Persons with Disabilities. Journal of Law, Medicine & Ethics, 47(1), 126-133. doi: 10.1177/1073110519840492

Newton-Howes, G., Cook, S., Martin, G., Foulds, J. A., & Boden, J. M. (2019). Comparison of age of first drink and age of first intoxication as predictors of substance use and mental health problems in adulthood. Drug & Alcohol Dependence, 194, 238-243. doi: 10.1016/j.drugalcdep.2018.10.012

Newton-Howes, G., Pickering, N., & Young, G. (2019). Authentic decision-making capacity in hard medical cases. Clinical Ethics, 14(4), 173-177. doi: 10.1177/1477750919876248

Beaglehole, B., Mulder, R. T., Frampton, C. M., Boden, J. M., Newton-Howes, G., & Bell, C. J. (2018). Psychological distress and psychiatric disorder after natural disasters: Systematic review and meta-analysis. British Journal of Psychiatry, 213(6), 716-722. doi: 10.1192/bjp.2018.210

Olajide, K., Munjiza, J., Moran, P., O'Connell, L., Newton-Howes, G., Bassett, P., … Mulder, R., & Crawford, M. J. (2018). Development and psychometric properties of the Standardized Assessment of Severity of Personality Disorder (SASPD). Journal of Personality Disorders, 32(1), 44-56. doi: 10.1521/pedi_2017_31_285

Newton-Howes, G., Mulder, R., Ellis, P. M., Boden, J. M., & Joyce, P. (2018). Predictive utility of personality disorder in depression: Comparison of outcomes and taxonomic approach. Journal of Personality Disorders, 32(4), 513-526. doi: 10.1521/pedi_2017_31_311

Ford, K., Foulds, J., Coleman, O., Ardagh, M., Pearson, S., Droste, N., Newton-Howes, G., & Sellman, J. D. (2018). Alcohol-related emergency department attendances after the introduction of the Sale and Supply of Alcohol Act 2012. New Zealand Medical Journal, 131(1483), 40-49. Retrieved from https://www.nzma.org.nz/journal

Guy, N., Newton-Howes, G., Ford, H., Williman, J., & Foulds, J. (2018). The prevalence of comorbid alcohol use disorder in the presence of personality disorder: Systematic review and explanatory modelling. Personality & Mental Health, 12(3), 216-228. doi: 10.1002/pmh.1415

Newton-Howes, G., Beverley, G., Ellis, P. M., Gordon, S., & Levack, W. (2018). What do final year medical students understand by the concept of recovery? A descriptive qualitative study. Academic Psychiatry, 42(3), 382-385. doi: 10.1007/s40596-017-0823-0

Foulds, J. A., Boden, J. M., Newton-Howes, G. M., Mulder, R. T., & Horwood, L. J. (2017). The role of novelty seeking as a predictor of substance use disorder outcomes in early adulthood. Addiction, 112(9), 1629-1637. doi: 10.1111/add.13838

Every-Palmer, S., Newton-Howes, G., & Clarke, M. J. (2017). Pharmacological treatment for antipsychotic-related constipation (Review). Cochrane Database of Systematic Reviews, 1, CD011128. doi: 10.1002/14651858.CD011128.pub2

Foulds, J., Newton-Howes, G., Guy, N. H., Boden, J. M., & Mulder, R. T. (2017). Dimensional personality traits and alcohol treatment outcome: A systematic review and meta-analysis. Addiction, 112(8), 1345-1357. doi: 10.1111/add.13810

Herpertz, S. C., Huprich, S. K., Bohus, M., Chanen, A., Goodman, M., Mehlum, L., … Newton-Howes, G., … Sharp, C. (2017). The challenge of transforming the diagnostic system of personality disorders. Journal of Personality Disorders, 31(5), 577-589. doi: 10.1521/pedi_2017_31_338

Callaghan, S., & Newton-Howes, G. (2017). Coercive community treatment in mental health: An idea whose time has passed? Journal of Law & Medicine, 24(4), 900-914.

Newton-Howes, G. M., Foulds, J. A., Guy, N. H., Boden, J. M., & Mulder, R. T. (2017). Personality disorder and alcohol treatment outcome: Systematic review and meta-analysis. British Journal of Psychiatry, 211(1), 22-30. doi: 10.1192/bjp.bp.116.194720

Newton-Howes, G., Levack, W. M. M., McBride, S., Gilmore, M., & Tester, R. (2016). Non-physiological mechanisms influencing disulfiram treatment of alcohol use disorder: A grounded theory study. Drug & Alcohol Dependence, 165, 126-131. doi: 10.1016/j.drugalcdep.2016.05.027

Foulds, J. A., Mulder, R. T., Newton-Howes, G., Adamson, S. J., Boden, J. M., & Sellman, J. D. (2016). Personality predictors of drinking outcomes in depressed alcohol-dependent patients. Alcohol & Alcoholism, 51(3), 296-301. doi: 10.1093/alcalc/agv122

Newton-Howes, G., & Boden, J. M. (2016). Relation between age of first drinking and mental health and alcohol and drug disorders in adulthood: Evidence from a 35 year cohort study. Addiction, 111(4), 637-644. doi: 10.1111/add.13230

Newton-Howes, G., Clark, L. A., & Chanen, A. (2015). Personality disorder across the life course. Lancet, 385(9969), 727-734. doi: 10.1016/s0140-6736(14)61283-6

Newton-Howes, G., & Stanley, J. (2015). Patient characteristics and predictors of completion in residential treatment for substance use disorders. Psychiatric Bulletin, 39, 221-227. doi: 10.1192/pb.bp.114.047639

Newton-Howes, G., Horwood, J., & Mulder, R. (2015). Personality characteristics in childhood and outcomes in adulthood: Findings from a 30 year longitudinal study. Australian & New Zealand Journal of Psychiatry, 49(4), 377-386. doi: 10.1177/0004867415569796

Newton-Howes, G. (2014). The impact of mental state disorder and personality on social functioning in patients engaged in community mental health care. Australasian Psychiatry, 22(1), 19-22. doi: 10.1177/1039856213500093

Newton-Howes, G., Lacey, C. J., & Banks, D. (2014). Community treatment orders: The experiences of non-Maori and Maori within mainstream and Maori mental health services. Social Psychiatry & Psychiatric Epidemiology, 49(2), 267-273. doi: 10.1007/s00127-013-0734-7

Newton-Howes, G., & Banks, D. (2014). The subjective experience of community treatment orders: Patients' views and clinical correlations. International Journal of Social Psychiatry, 60(5), 474-481. doi: 10.1177/0020764013498870

Newton-Howes, G., Tyrer, P., Johnson, T., Mulder, R., Kool, S., Dekker, J., & Schoeveres, R. (2014). Influence of personality on the outcome of treatment in depression: Systematic review and meta-analysis. Journal of Personality Disorders, 28(4), 577-593. doi: 10.1521/pedi_2013_27_070

Newton-Howes, G., & Wood, R. (2013). Cognitive behavioural therapy and the psychopathology of schizophrenia: Systematic review and meta-analysis. Psychology & Psychotherapy: Theory, Research & Practice, 86(2), 127-138. doi: 10.1111/j.2044-8341.2011.02048.x

Newton-Howes, G. (2013). Use of seclusion for managing behavioural disturbances in patients. Advances in Psychiatric Treatment, 19, 422-428. doi: 10.1192/apt.bp.112.011114

Newton-Howes, G., & Marsh, R. (2013). Personality dysfunction and social functioning in schizophrenia. Personality & Mental Health, 7(2), 114-121. doi: 10.1002/pmh.1206

Newton-Howes, G. (2013). A factor analysis of patients’ views of compulsory community treatment orders: The factors associated with detention. Psychiatry, Psychology & Law, 20(4), 519-526. doi: 10.1080/13218719.2012.715827

Missen, R. L., Brannelly, T., & Newton-Howes, G. (2013). Qualitative exploration of family perspectives of smoke-free mental health and addiction services. International Journal of Mental Health Nursing, 22(4), 294-303. doi: 10.1111/j.1447-0349.2012.00882.x

Newton-Howes, G., & Stanley, J. (2012). Prevalence of perceived coercion among psychiatric patients: Literature review and meta-regression modelling. Psychiatrist, 36(9), 335-340. doi: 10.1192/pb.bp.111.037358

Newton-Howes, G., & Mullen, R. (2011). Coercion in psychiatric care: Systematic review of correlates and themes. Psychiatric Services, 62(5), 465-470. doi: 10.1176/appi.ps.62.5.465

Mulder, R. T., Newton-Howes, G., Crawford, M. J., & Tyrer, P. J. (2011). The central domains of personality pathology in psychiatric patients. Journal of Personality Disorders, 25(3), 364-377. doi: 10.1521/pedi.2011.25.3.364

Davidson, K., Halford, J., Kirkwood, L., Newton-Howes, G., Sharp, M., & Tata, P. (2010). CBT for violent men with antisocial personality disorder: Reflections on the experience of carrying out therapy in MASCOT, a pilot randomized controlled trial. Personality & Mental Health, 4(2), 86-95. doi: 10.1002/pmh.94

Newton-Howes, G., Tyrer, P., Anagnostakis, K., Cooper, S., Bowden-Jones, O., & Weaver, T. (2010). The prevalence of personality disorder, its comorbidity with mental state disorders, and its clinical significance in community mental health teams. Social Psychiatry & Psychiatric Epidemiology, 45(4), 453-460. doi: 10.1007/s00127-009-0084-7

Tyrer, P., Mulder, R., Crawford, M., Newton-Howes, G., Simonsen, E., Ndetei, D., … Barrett, B. (2010). Personality disorder: A new global perspective. World Psychiatry, 9(1), 56-60.

Newton-Howes, G., Tyrer, P., North, B., & Yang, M. (2008). The prevalence of personality disorder in schizophrenia and psychotic disorders: Systematic review of rates and explanatory modelling. Psychological Medicine, 38(8), 1075-1082. doi: 10.1017/S0033291707002036

Newton-Howes, G. (2008). The influence of personality disorders on the outcome of depression. Psychiatry (Abingdon), 7(3), 105-108. doi: 10.1016/j.mppsy.2008.01.006

Newton-Howes, G., Tyrer, P., & Weaver, T. (2008). Social functioning of patients with personality disorder in secondary care. Psychiatric Services, 59(9), 1033-1037. doi: 10.1176/appi.ps.59.9.1033

Newton-Howes, G., Weaver, T., & Tyrer, P. (2008). Attitudes of staff towards patients with personality disorder in community mental health teams. Australian & New Zealand Journal of Psychiatry, 42, 572-577. doi: 10.1080/00048670802119739

Newton-Howes, G., Tyrer, P., Moore, A., & Nur, U. (2007). Personality disorder and outcome in schizophrenia: A negative systematic review. Personality & Mental Health, 1(1), 21-26. doi: 10.1002/pmh.6

Malone, D., Marriott, S., Newton-Howes, G., Simmonds, S., & Tyrer, P. (2007). Community mental health teams (CMHTs) for people with severe mental illnesses and disordered personality (Review). Cochrane Database of Systematic Reviews, 3, CD000270. doi: 10.1002/14651858.CD000270.pub2

Newton-Howes, G., Tyrer, P., & Johnson, T. (2006). Personality disorder and the outcome of depression: Meta-analysis of published studies. British Journal of Psychiatry, 188, 13-20. doi: 10.1192/bjp.188.1.13

Tyrer, P., & Newton-Howes, G. (2005). Rational drug treatment for personality disorders. Psychiatry (Abingdon), 4(3), 11-14.

Newton-Howes, G. (2004). What happens when children with attention deficit/hyperactivity disorder grow up? Journal of the Royal Society of Medicine, 97, 531-535.

Newton-Howes, G., & Tyrer, P. (2003). Pharmacotherapy for personality disorders. Expert Opinion on Pharmacotherapy, 4(10), 1643-1649. doi: 10.1517/14656566.4.10.1643

Newton-Howes, P. A. G., Bedford, N. D., Dobbs, B. R., & Frizelle, F. A. (1998). Informed consent: What do patients want to know? New Zealand Medical Journal, 111, 340-342.

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Journal - Research Other

Newton-Howes, G., & Gordon, S. (2020). Who controls your future: The convention on the rights of persons with disabilities from a service user focused perspective. Australian & New Zealand Journal of Psychiatry, 54(2), 134-137. doi: 10.1177/0004867419893443

Newton-Howes, G. (2020). Is the problem bioethics versus law or the principles of doctors. American Journal of Bioethics Neuroscience, 11(1), 28-31. doi: 10.1080/21507740.2019.1704919

Braithwaite, I., Newton-Howes, G., Oldfield, K., & Semprini, A. (2019). Cannabis-based medicinal products and the role of the doctor: Should we be cautious or cautiously optimistic? New Zealand Medical Journal, 132(1500), 82-88. Retrieved from https://www.nzma.org.nz/journal

Newton-Howes, G. (2018). Risk in mental health: A review on and of the psychiatrist. Journal of Mental Health Training, Education and Practice, 13(1), 14-21. doi: 10.1108/JMHTEP-04-2017-0030

Newton-Howes, G., & Foulds, J. (2018). Personality disorder and treatment outcome in alcohol use disorder. Current Opinion in Psychiatry, 31(1), 50-56. doi: 10.1097/yco.0000000000000375

Newton-Howes, G., & Foulds, J. (2018). Personality disorder and alcohol use disorder: An overview. Psychopathology, 51(2), 130-136. doi: 10.1159/000486602

Newton-Howes, G. (2018). The challenges of 'medical cannabis' and mental health: A clinical perspective. British Journal of Clinical Pharmacology, 84(11), 2499-2501. doi: 10.1111/bcp.13687

Simonsen, E., & Newton-Howes, G. (2018). Personality pathology and schizophrenia. Schizophrenia Bulletin, 44(6), 1180-1184. doi: 10.1093/schbul/sby053

Newton-Howes, G., Foulds, J., & McBride, S. (2018). Cannabis and the primary care physician. Clinical Focus Primary Care, 12(2), 84-91. [Review].

Newton-Howes, G. (2017). Cannabis as medicine. BMJ, 357, j2130. doi: 10.1136/bmj.j2130

Newton-Howes, G., & Ryan, C. J. (2017). The use of community treatment orders in competent patients is not justified. British Journal of Psychiatry, 210(5), 311-312. doi: 10.1192/bjp.bp.116.193920

Mulder, R. T., Newton-Howes, G., & Cold, J. (2017). The red corner: In support of formal risk prediction in psychiatry: Author's reply. British Journal of Psychiatry, 210(5), 369-370. doi: 10.1192/bjp.210.5.369b

Newton-Howes, G., & Gordon, S. (2017). The recovery paradigm and distress conceptualized as personality disorder: Lack of evidence does not equate to a lack of importance. Personality & Mental Health, 11(1), 33-36. doi: 10.1002/pmh.1364

Newton-Howes, G., & McBride, S. (2016). Medicinal cannabis: Moving the debate forward. New Zealand Medical Journal, 129(1445), 103-109. Retrieved from http://www.nzma.org.nz/journal

Mulder, R., Newton-Howes, G., & Coid, J. W. (2016). The futility of risk prediction in psychiatry. British Journal of Psychiatry, 209(4), 271-272. doi: 10.1192/bjp.bp.116.184960

Newton-Howes, G., & McBride, S. (2016). Cannabis in New Zealand: Smoking gun of medicalised smokescreen? New Zealand Medical Journal, 129(1433), 13-16. Retrieved from http://www.nzma.org.nz/journal

Newton-Howes, G., Mulder, R., & Tyrer, P. (2015). Diagnostic neglect: The potential impact of losing a separate axis for personality disorder. British Journal of Psychiatry, 206(5), 355-356. doi: 10.1192/bjp.bp.114.155259

Every-Palmer, S., Newton-Howes, G., & Clarke, M. J. (2014). Pharmacological treatment for antipsychotic-related constipation (Protocol). Cochrane Database of Systematic Reviews, (5), CD011128. doi: 10.1002/14651858.CD011128

Newton-Howes, G. (2010). Coercion in psychiatric care: Where are we now, what do we know, where do we go? [Editorial]. Psychiatrist, 34(6), 217-220. doi: 10.1192/pb.bp.109.027391

Newton-Howes, G. (2009). The low down: Clinical response complicated by tonic–clonic seizures on low-dose clozapine [Correspondence]. Australian & New Zealand Journal of Psychiatry, 43, 979-980. doi: 10.1080/00048670903179186

Malone, D., Marriott, S., Newton-Howes, G., Simmonds, S., & Tyrer, P. (2009). Community mental health teams for people with severe mental illnesses and disordered personality [Special feature]. Schizophrenia Bulletin, 35(1), 13-14. doi: 10.1093/schbul/sbn164

Newton-Howes, G. (2007). The impact of personality and personality disorders on the treatment of depression by Gabbard and Simonsen [Commentary]. Personality & Mental Health, 1(2), 179-180. doi: 10.1002/pmh

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