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John HorwoodProfessor

BA BSc(Auck) MSc(Cant)

Email john.horwood@otago.ac.nz

John is the biostatistician and former Director of the Christchurch Health and Development Study research unit.

His current research interests focus on aspects of psychosocial development in adolescence and young adulthood including:

  • the development, course and consequences of cannabis and other illicit drug use
  • life course trajectories in antisocial behaviour
  • the consequences of early onset psychiatric disorder for later adult functioning
  • the psychosocial consequences of the Canterbury earthquakes
  • and the long term functional outcomes of preterm birth and very low birthweight

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Publications

Duncan, R., Mulder, R., Wilkinson, S. H., & Horwood, L. J. (2019). Medically unexplained symptoms and antecedent sexual abuse: An observational study of a birth cohort. Psychosomatic Medicine. Advance online publication. doi: 10.1097/psy.0000000000000726

Spittlehouse, J. K., Boden, J. M., & Horwood, L. J. (2019). Sexual orientation and mental health over the life course in a birth cohort. Psychological Medicine. Advance online publication. doi: 10.1017/S0033291719001284

Watson, H. J., Yilmaz, Z., Thornton, L. M., Hübel, C., Coleman, J. R. I., Gaspar, H. A., … Roberts, M., … Boden, J. M., … Horwood, L. J., … Pearson, J. F., … Jordan, J., Kennedy, M., … Bulik, C. M. (2019). Genome-wide association study identifies eight risk loci and implicates metabo-psychiatric origins for anorexia nervosa. Nature Genetics, 51, 1207-1214. doi: 10.1038/s41588-019-0439-2

Najman, J. M., Plotnikova, M., Horwood, J., Silins, E., Fergusson, D., Patton, G. C., … Mattick, R. P. (2019). Does adolescent heavier alcohol use predict young adult aggression and delinquency? Parallel analyses from four Australasian cohort studies. Aggressive Behavior. Advance online publication. doi: 10.1002/ab.21828

Richards, A., Horwood, J., Boden, J., Kennedy, M., Sellers, R., Riglin, L., … Harold, G. T. (2018). Associations between schizophrenia genetic risk, anxiety disorders and manic/hypomanic episode in a longitudinal population cohort study. British Journal of Psychiatry. Advance online publication. doi: 10.1192/bjp.2018.227

Authored Book - Research

Sturrock, F., Gray, D., Fergusson, D., Horwood, J., & Smits, C. (2014). Incredible years: Follow up study: Long-term follow-up of the New Zealand Incredible Years Pilot Study. Wellington, New Zealand: Ministry of Social Development, 33p.

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Journal - Research Article

Spittlehouse, J. K., Boden, J. M., & Horwood, L. J. (2019). Sexual orientation and mental health over the life course in a birth cohort. Psychological Medicine. Advance online publication. doi: 10.1017/S0033291719001284

Najman, J. M., Plotnikova, M., Horwood, J., Silins, E., Fergusson, D., Patton, G. C., … Mattick, R. P. (2019). Does adolescent heavier alcohol use predict young adult aggression and delinquency? Parallel analyses from four Australasian cohort studies. Aggressive Behavior. Advance online publication. doi: 10.1002/ab.21828

Duncan, R., Mulder, R., Wilkinson, S. H., & Horwood, L. J. (2019). Medically unexplained symptoms and antecedent sexual abuse: An observational study of a birth cohort. Psychosomatic Medicine. Advance online publication. doi: 10.1097/psy.0000000000000726

Watson, H. J., Yilmaz, Z., Thornton, L. M., Hübel, C., Coleman, J. R. I., Gaspar, H. A., … Roberts, M., … Boden, J. M., … Horwood, L. J., … Pearson, J. F., … Jordan, J., Kennedy, M., … Bulik, C. M. (2019). Genome-wide association study identifies eight risk loci and implicates metabo-psychiatric origins for anorexia nervosa. Nature Genetics, 51, 1207-1214. doi: 10.1038/s41588-019-0439-2

Sillins, E., Horwood, L. J., Najman, J. M., Patton, G. C., Toumbourou, J. W., Olsson, C. A., … Fergusson, D., … Boden, J. M., … for the Cannabis Cohorts Research Consortium. (2018). Adverse adult consequences of different alcohol use patterns in adolescence: An integrative analysis of data to age 30 years from four Australasian cohorts. Addiction. Advance online publication. doi: 10.1111/add.14263

Bell, C. J., Foulds, J. A., Horwood, L. J., Mulder, R. T., & Boden, J. M. (2018). Childhood abuse and psychotic experiences in adulthood: findings from a 35-year longitudinal study. British Journal of Psychiatry. Advance online publication. doi: 10.1192/bjp.2018.264

McLeod, G. F. H., Fergusson, D. M., Horwood, L. J., Boden, J. M., & Carter, F. A. (2018). Childhood predictors of adult adiposity: Findings from a longitudinal study. New Zealand Medical Journal, 131(1472), 10-20. Retrieved from https://www.nzma.org.nz/journal

Walker, G. H., Boden, J. M., Fergusson, D. M., & Horwood, L. J. (2018). Examining the associations between offending trajectories in adolescence/young adulthood and subsequent mental health disorders. Journal of Criminal Justice. Advance online publication. doi: 10.1016/j.jcrimjus.2018.09.008

Thornton, L. M., Munn-Chernoff, M. A., Baker, J. H., Juréus, A., Parker, R., Henders, A. K., … Horwood, L. J., Boden, J. M., Pearson, J. F., … Jordan, J., Kennedy, M. A., … Bulik, C. M. (2018). The Anorexia Nervosa Genetics Initiative (ANGI): Overview and methods. Contemporary Clinical Trials, 74, 61-69. doi: 10.1016/j.cct.2018.09.015

Richards, A., Horwood, J., Boden, J., Kennedy, M., Sellers, R., Riglin, L., … Harold, G. T. (2018). Associations between schizophrenia genetic risk, anxiety disorders and manic/hypomanic episode in a longitudinal population cohort study. British Journal of Psychiatry. Advance online publication. doi: 10.1192/bjp.2018.227

McLeod, G. F. H., Horwood, L. J., Boden, J. M., & Fergusson, D. M. (2018). Early childhood education and later educational attainment and socioeconomic wellbeing outcomes to age 30. New Zealand Journal of Educational Studies, 53(2), 257-273. doi: 10.1007/s40841-018-0106-7

Culverhouse, R. C., Saccone, N. L., Horton, A. C., Ma, Y., Anstey, K. J., Banaschewski, T., … Horwood, J., … Fergusson, D. M., … Kennedy, M., … Bierut, L. J. (2018). Collaborative meta-analysis finds no evidence of a strong interaction between stress and 5-HTTLPR genotype contributing to the development of depression. Molecular Psychiatry, 23, 133-142. doi: 10.1038/mp.2017.44

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

McKinlay, A., & Horwood, L. J. (2017). The accuracy of adult recall for early mild traumatic brain injury. Disability & Rehabilitation, 39(13), 1296-1299. doi: 10.1080/09638288.2016.1193905

Mangin, K. S., Horwood, L. J., & Woodward, L. J. (2017). Cognitive development trajectories of very preterm and typically developing children. Child Development, 88(1), 282-298. doi: 10.1111/cdev.12585

Boden, J. M., Lee, J. O., Horwood, L. J., Grest, C. V., & McLeod, G. F. H. (2017). Modelling possible causality in the associations between unemployment, cannabis use, and alcohol misuse. Social Science & Medicine, 175, 127-134. doi: 10.1016/j.socscimed.2017.01.001

McKinlay, A., Corrigan, J. D., Bogner, J. A., & Horwood, L. J. (2017). Obtaining a history of childhood traumatic brain injury using the Ohio State University TBI Identification Method to elicit adult recall. Journal of Head Trauma Rehabilitation, 32(6), E24-E28. doi: 10.1097/htr.0000000000000284

Bagshaw, A. T. M., Horwood, L. J., Fergusson, D. M., Gemmell, N. J., & Kennedy, M. A. (2017). Microsatellite polymorphisms associated with human behavioural and psychological phenotypes including a gene-environment interaction. BMC Medical Genetics, 18, 12. doi: 10.1186/s12881-017-0374-y

Foulds, J., Boden, J., Horwood, J., & Mulder, R. (2017). High novelty seeking as a predictor of antisocial behaviour in early adulthood. Personality & Mental Health, 11(4), 256-265. doi: 10.1002/pmh.1393

Bell, C. J., Boden, J. M., Horwood, L. J., & Mulder, R. T. (2017). The role of peri-traumatic stress and disruption distress in predicting symptoms of major depression following exposure to a natural disaster. Australian & New Zealand Journal of Psychiatry, 51(7), 711-718. doi: 10.1177/0004867417691852

Schaefer, J. D., Caspi, A., Belsky, D. W., Harrington, H., Houts, R., Horwood, L. J., … Ramrakha, S., Poulton, R., & Moffitt, T. E. (2017). Enduring mental health: Prevalence and prediction. Journal of Abnormal Psychology, 126(2), 212-224. doi: 10.1037/abn0000232

Friesen, M. D., Horwood, L. J., Fergusson, D. M., & Woodward, L. J. (2017). Exposure to parental separation in childhood and later parenting quality as an adult: Evidence from a 30-year longitudinal study. Journal of Child Psychology & Psychiatry, 58(1), 30-37. doi: 10.1111/jcpp.12610

Boden, J. M., Foulds, J. A., & Horwood, L. J. (2016). Examination of a possible J-shaped relationship between alcohol consumption and internalizing disorders in a longitudinal birth cohort. Drug & Alcohol Dependence, 162, 88-91. doi: 10.1016/j.drugalcdep.2016.02.032

McLeod, G. F. H., Horwood, L. J., Fergusson, D. M., & Boden, J. M. (2016). Life-stress and reactivity by gender in a longitudinal birth cohort at 30 and 35 years. Social Psychiatry & Psychiatric Epidemiology, 51(10), 1385-1394. doi: 10.1007/s00127-016-1254-z

McLeod, G. F. H., Fergusson, D. M., Horwood, L. J., & Carter, F. A. (2016). Adiposity and psychosocial outcomes at ages 30 and 35. Social Psychiatry & Psychiatric Epidemiology, 51, 309-318. doi: 10.1007/s00127-015-1101-7

McLeod, G. F. H., Horwood, L. J., & Fergusson, D. M. (2016). Adolescent depression, adult mental health and psychosocial outcomes at 30 and 35 years. Psychological Medicine, 46(7), 1401-1412. doi: 10.1017/S0033291715002950

Boden, J. M., van Stockum, S., Horwood, L. J., & Fergusson, D. M. (2016). Bullying victimization in adolescence and psychotic symptomatology in adulthood: Evidence from a 35-year study. Psychological Medicine, 46(6), 1311-1320. doi: 10.1017/S0033291715002962

Fergusson, D. M., Boden, J. M., & Horwood, L. J. (2015). From evidence to policy: Findings from the Christchurch Health and Development Study. Australian & New Zealand Journal of Criminology, 48(3), 386-408. doi: 10.1177/0004865815589827

Morris, R. W., Taylor, A. E., Fluharty, M. E., Bjørngaard, J. H., Åsvold, B. O., Gabrielsen, M. E., … Horwood, J., Fergusson, D. M., Kennedy, M. A., … Sattar, N. (2015). Heavier smoking may lead to a relative increase in waist circumference: Evidence for a causal relationship from a Mendelian randomisation meta-analysis: The CARTA consortium. BMJ Open, 5(8), e008808. doi: 10.1136/bmjopen-2015-008808

Badiani, A., Boden, J. M., De Pirro, S., Fergusson, D. M., Horwood, L. J., & Harold, G. T. (2015). Tobacco smoking and cannabis use in a longitudinal birth cohort: Evidence of reciprocal causal relationships. Drug & Alcohol Dependence, 150, 69-76. doi: 10.1016/j.drugalcdep.2015.02.015

Silins, E., Fergusson, D. M., Patton, G. C., Horwood, L. J., Olssen, C. A., Hutchinson, D. M., … for the Cannabis Cohorts Research Consortium. (2015). Adolescent substance use and educational attainment: An integrative data analysis comparing cannabis and alcohol from three Australasian cohorts. Drug & Alcohol Dependence, 156, 90-96. doi: 10.1016/j.drugalcdep.2015.08.034

Fergusson, D. M., McLeod, G. F. H., & Horwood, L. J. (2015). Leaving school without qualifications and mental health problems to age 30. Social Psychiatry & Psychiatric Epidemiology, 50, 469-478. doi: 10.1007/s00127-014-0971-4

Boden, J. M., Fergusson, D. M., Horwood, L. J., & Mulder, R. T. (2015). The role of peri-traumatic stress and disruption distress in predicting post-traumatic stress disorder symptoms following exposure to a natural disaster. BJPsych Open, 1(1), 81-86. doi: 10.1192/bjpo.bp.115.001180

Fergusson, D. M., McLeod, G. F. H., Horwood, L. J., Swain, N. R., Chapple, S., & Poulton, R. (2015). Life satisfaction and mental health problems (18 to 35 years). Psychological Medicine, 45, 2427-2436. doi: 10.1017/s0033291715000422

Fergusson, D. M., Boden, J. M., & Horwood, L. J. (2015). Psychosocial sequelae of cannabis use and implications for policy: Findings from the Christchurch Health and Development Study. Social Psychiatry & Psychiatric Epidemiology, 50, 1317-1326. doi: 10.1007/s00127-015-1070-x

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

Fergusson, D. M., Boden, J. M., Horwood, L. J., & Mulder, R. T. (2015). Perceptions of distress and positive consequences following exposure to a major disaster amongst a well-studied cohort. Australian & New Zealand Journal of Psychiatry, 49(4), 351-359. doi: 10.1177/0004867414560652

Boden, J. M., Fergusson, D. M., & Horwood, L. J. (2015). Outcomes for children and families following unplanned pregnancy: Findings from a longitudinal birth cohort. Child Indicators Research, 8(2), 389-402. doi: 10.1007/s12187-014-9241-y

Boden, J. M., Fergusson, D. M., & Horwood, L. J. (2014). Associations between exposure to stressful life events and alcohol use disorder in a longitudinal birth cohort studied to age 30. Drug & Alcohol Dependence, 142, 154-160. doi: 10.1016/j.drugalcdep.2014.06.010

Taylor, A. E., Morris, R. W., Fluharty, M. E., Bjorngaard, J. H., Åsvold, B. O., Gabrielsen, M. E., … Horwood, J., Fergusson, D. M., Kennedy, M. A., … Sattar, N. (2014). Stratification by smoking status reveals a direct association of CHRNA5-A3-B4 genotype with body mass index in never smokers. PLoS Genetics, 10(12), e1004799. doi: 10.1371/journal.pgen.1004799

Silins, E., Horwood, L. J., Patton, G. C., Fergusson, D. M., Olsson, C. A., Hutchinson, D. M., … for the Cannabis Cohorts Research Consortium. (2014). Young adult sequelae of adolescent cannabis use: An integrative analysis. Lancet Psychiatry, 1(4), 286-293. doi: 10.1016/S2215-0366(14)70307-4

Fergusson, D. M., Horwood, L. J., Boden, J. M., & Mulder, R. T. (2014). Impact of a major disaster on the mental health of a well-studied cohort. JAMA Psychiatry, 71(9), 1025-1031. doi: 10.1001/jamapsychiatry.2014.652

Fergusson, D. M., McLeod, G. F. H., & Horwood, L. J. (2014). Breast feeding, infant growth, and body mass index at 30 and 35 years. Paediatric & Perinatal Epidemiology, 28(6), 545-552. doi: 10.1111/ppe.12144

Darlow, B. A., Horwood, L. J., Pere-Bracken, H. M., & Woodward, L. J. (2013). Psychosocial outcomes of young adults born very low birth weight. Pediatrics, 132(6), e1521-e1528. doi: 10.1542/peds.2013-2024

Fergusson, D. M., Boden, J. M., & Horwood, L. J. (2013). Childhood self-control and adult outcomes: Results from a 30-year longitudinal study. Journal of the American Academy of Child & Adolescent Psychiatry, 52(7), 709-717. doi: 10.1016/j.jaac.2013.04.008

Fergusson, D. M., Boden, J. M., & Horwood, L. J. (2013). Nine-year follow-up of a home-visitation program: A randomized trial. Pediatrics, 131(2), 297-303. doi: 10.1542/peds.2012-1612

Fergusson, D. M., McLeod, G. F. H., & Horwood, L. J. (2013). Childhood sexual abuse and adult developmental outcomes: Findings from a 30-year longitudinal study in New Zealand. Child Abuse & Neglect, 37(9), 664-674. doi: 10.1016/j.chiabu.2013.03.013

Boden, J. M., Fergusson, D. M., & Horwood, L. J. (2013). Alcohol misuse and criminal offending: Findings from a 30-year longitudinal study. Drug & Alcohol Dependence, 128(1-2), 30-36. doi: 10.1016/j.drugalcdep.2012.07.014

Horwood, L. J., Fergusson, D. M., Coffey, C., Patton, G. C., Tait, R., Smart, D., … Hutchinson, D. M. (2012). Cannabis and depression: An integrative data analysis of four Australasian cohorts. Drug & Alcohol Dependence, 126(3), 369-378. doi: 10.1016/j.drugalcdep.2012.06.002

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