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Associate Professor Giles Newton-Howes

Senior Lecturer

Giles_Newton-Howes_profile

Contact details

Email giles.newton-howes@otago.ac.nz

Research interests and activities

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. 

He is a member of the International Society for the Study of Personality Disorders and the Australasian Society for Psychiatric Research. He is one of the systematic reviews editors of the British Journal of Psychiatry and sits on the board of the British Journal of Psychiatry and The Psychiatrist.

At the University he is responsible for the sixth year program in psychological medicine in Wellington. He is an accredited examiner for the RANZCP and works as a consultant psychiatrist for CCDHB in the Regional Personality Disorder Service.

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Publications

Newton-Howes, G., Daly, M., Cooney, J., Gledhill, K., & Gordon, S. (2022). Supported decision making teaching in New Zealand postgraduate psychiatry trainees. Australasian Psychiatry. Advance online publication. doi: 10.1177/10398562221100702

Knipe, D., Padmanathan, P., Newton-Howes, G., Chan, L. F., & Kapur, N. (2022). Suicide and self-harm. Lancet. Advance online publication. doi: 10.1016/S0140-6736(22)00173-8

Pickering, N. J., Newton-Howes, G., & Walker, S. (2022). Risk-related standards of competence are a nonsense. Journal of Medical Ethics. Advance online publication. doi: 10.1136/medethics-2021-108107

Cumming, C., Armstrong, G., Borschmann, R., Foulds, J. A., Newton-Howes, G., McKetin, R., … Young, J. (2022). Amphetamine-type stimulant use and self-harm: Protocol for a systematic review of observational studies. BMJ Open, 12(1), e057029. doi: 10.1136/bmjopen-2021-057029

Tyrer, P., Mulder, R., Newton-Howes, G., & Duggan, C. (2022). Galenic syndromes: Combinations of mental state and personality disorders too closely entwined to be separated. British Journal of Psychiatry. Advance online publication. doi: 10.1192/bjp.2021.220

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.

Chapter in Book - Research

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.

Chapter in Book - Research

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.

Chapter in Book - Research

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.

Chapter in Book - Other

Newton-Howes, G., Daly, M., Cooney, J., Gledhill, K., & Gordon, S. (2022). Supported decision making teaching in New Zealand postgraduate psychiatry trainees. Australasian Psychiatry. Advance online publication. doi: 10.1177/10398562221100702

Journal - Research Article

Pickering, N. J., Newton-Howes, G., & Walker, S. (2022). Risk-related standards of competence are a nonsense. Journal of Medical Ethics. Advance online publication. doi: 10.1136/medethics-2021-108107

Journal - Research Article

Bach, B., Brown, T. A., Mulder, R. T., Newton-Howes, G., Simonsen, E., & Sellbom, M. (2021). Development and initial evaluation of the ICD-11 personality disorder severity scale: PDS-ICD-11. Personality & Mental Health. Advance online publication. doi: 10.1002/pmh.1510

Journal - Research Article

Beaglehole, B., Newton-Howes, G., & Frampton, C. (2021). Compulsory Community Treatment Orders in New Zealand and the provision of care: An examination of national databases and predictors of outcome. Lancet Regional Health: Western Pacific, 17, 100275. doi: 10.1016/j.lanwpc.2021.100275

Journal - Research Article

Boden, J. M., Crossin, R., Cook, S., Martin, G., Foulds, J., & Newton-Howes, G. (2021). Parenting and home environment in childhood and adolescence and alcohol use disorder in adulthood. Journal of Adolescent Health. Advance online publication. doi: 10.1016/j.jadohealth.2020.12.136

Journal - Research Article

Boden, J. M., Foulds, J. A., Newton-Howes, G., & McKetin, R. (2021). Methamphetamine use and psychotic symptoms: Findings from a New Zealand longitudinal birth cohort. Psychological Medicine. Advance online publication. doi: 10.1017/S0033291721002415

Journal - Research Article

Every-Palmer, S., Kininmonth, L., Newton-Howes, G., & Gordon, S. (2021). Applying human rights and reducing coercion in psychiatry following service user-led education: A qualitative study. Health & Human Rights. Advance online publication. Retrieved from https://www.hhrjournal.org

Journal - Research Article

Gordon, S. E., Kininmonth, L. A., Newton-Howes, G., Purdie, G. L., & Gardiner, T. (2021). A comparative analysis of two alternative programmes to counter stigma and discrimination associated with mental illness delivered to medical students. Australasian Psychiatry, 29(3), 357-360. doi: 10.1177/1039856220971935

Journal - Research Article

Hemmati, A., Newton-Howes, G., Falahi, S., Mostafavi, S., Colarusso, C. A., & Komasi, S. (2021). 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, 43(2), 135-143. doi: 10.1177/0253717620928813

Journal - Research Article

Newton-Howes, G., Senior, J., Beaglehole, B., Purdie, G. L., & Gordon, S. E. (2021). Does a comprehensive service user-led education programme effect more positive attitudes towards recovery and less stigmatising attitudes towards people with lived experience of mental distress in medical students? A comparative cohort study. Australian & New Zealand Journal of Psychiatry. Advance online publication. doi: 10.1177/0004867420987886

Journal - Research Article

Oldfield, K., Ryan, J., Doppen, M., Kung, S., Braithwaite, I., & Newton-Howes, G. (2021). A systematic review of the label accuracy of cannabinoid-based products in regulated markets: Is what's on the label what's in the product? Australasian Psychiatry, 29(1), 88-96. doi: 10.1177/1039856220965334

Journal - Research Article

Pickering, N., Newton-Howes, G., & Young, G. (2021). Harmful choices, the case of C, and decision-making competence. American Journal of Bioethics. Advance online publication. doi: 10.1080/15265161.2021.1941422

Journal - Research Article

Bhagavan, C., Kung, S., Doppen, M., John, M., Vakalalabure, I., Oldfield, K., Braithwaite, I., & Newton-Howes, G. (2020). Cannabinoids in the treatment of insomnia disorder: A systematic review and meta-analysis. CNS Drugs, 34, 1217-1228. doi: 10.1007/s40263-020-00773-x

Journal - Research Article

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

Journal - Research Article

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

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

Journal - Research Article

Newton-Howes, G., Cunningham, R., & Atkinson, J. (2020). Personality disorder prevalence and correlates in a whole of nation dataset. Social Psychiatry & Psychiatric Epidemiology, 56(4), 679-685. doi: 10.1007/s00127-020-01876-y

Journal - Research Article

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

Journal - Research Article

Newton-Howes, G., Kininmonth, L., & Gordon, S. (2020). Substituted decision making and coercion: The socially accepted problem in psychiatric practice and a CRPD-based response to them. International Journal of Mental Health & Capacity Law, 26, 4-12. doi: 10.19164/ijmhcl.26.1091

Journal - Research Article

Newton-Howes, G., Savage, M. K., Arnold, R., Hasegawa, T., Staggs, V., & Kisely, S. (2020). The use of mechanical restraint in Pacific Rim countries: An international epidemiological study. Epidemiology & Psychiatric Sciences, 29, e190. doi: 10.1017/S2045796020001031

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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.

Journal - Research Article

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

Journal - Research Article

Foulds, J. A., Boden, J. M., Newton-Howes, G., 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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

Newton-Howes, G., 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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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

Journal - Research Article

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