John retired from the University in 2021 after 44 years' service as the lead biostatistician for the Christchurch Health and Development Study (CHDS). From 2015 to 2019, he served as the third Director in the history of the CHDS. He was a much respected academic and colleague and will be greatly missed.
His research focussed 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
Watson, H. J., Thornton, L. M., Yilmaz, Z., Baker, J. H., Coleman, J. R. I., Adan, R. A. H., … Boden, J. M., … Horwood, L. J., … Jordan, J., Kennedy, M., … Bulik, C. M. (2022). Common genetic variation and age at onset of anorexia nervosa. Biological Psychiatry: Global Open Science, 2, 368-378. doi: 10.1016/j.bpsgos.2021.09.001
Journal - Research Article
McLeod, G. F. H., Cleland, L., Welch, J., Spittlehouse, J. K., Fenton, A., Boden, J. M., & Horwood, L. J. (2022). Menopause status and climacteric symptoms in a birth cohort of mid-life New Zealand women. Climacteric, 25(3), 271-277. doi: 10.1080/13697137.2021.1948005
Journal - Research Article
McLeod, G. F. H., Horwood, L. J., Darlow, B. A., Boden, J. M., Martin, J., Spittlehouse, J. K., Carter, F. A., Jordan, J., Porter, R., Bell, C., Douglas, K., … McIntosh, V. V. W., … Vierck, E. (2022). Recruitment and retention of participants in longitudinal studies after a natural disaster. Longitudinal & Life Course Studies, 13(2), 287-306. doi: 10.1332/175795921X16168462584238
Journal - Research Article
Noble, A. J., Pearson, J. F., Kennedy, M. A., Boden, J. M., Horwood, L. J., & Osborne, A. J. (2021). Does DNA methylation link the association between maternal tobacco use during pregnancy and altered offspring neurodevelopment. Proceedings of the 16th Congress of the Federation of Asian & Oceanic Biochemists & Molecular Biologists (FAOBMB). (pp. 292). Retrieved from https://www.faobmb2021.org
Conference Contribution - Published proceedings: Abstract
Greer, C., Harris, S. L., Troughton, R., Adamson, P. D., Horwood, J., Frampton, C., & Darlow, B. A. (2021). Right ventricular structure and function in young adults born preterm at very low birth weight. Journal of Clinical Medicine, 10(21), 4864. doi: 10.3390/jcm10214864
Journal - Research Article
Ip, H. F., van der Laan, C. M., Krapohl, E. M. L., Brikell, I., Sánchez-Mora, C., Nolte, I. M., … Miller, A., … Boden, J., Pearson, J., Horwood, L. J., Kennedy, M., Poulton, R., … Boomsma, D. I. (2021). Genetic association study of childhood aggression across raters, instruments, and age. Translational Psychiatry, 11, 413. doi: 10.1038/s41398-021-01480-x
Journal - Research Article
Darlow, B. A., Horwood, J., Dhakal, B., Harris, S. L., McKelvey, V. A., Elliott, J. M., Yang, J., & Mackay, R. J. (2021). Biomarkers of ageing in New Zealand VLBW young adults and controls. Pediatric Research, 89, 533-539. doi: 10.1038/s41390-020-0882-x
Journal - Research Article
Eves, R., Mendonça, M., Baumann, N., Ni, Y., Darlow, B. A., Horwood, J., Woodward, L. J., … Wolke, D. (2021). Association of very preterm birth or very low birth weight with intelligence in adulthood: An individual participant data meta-analysis. JAMA Pediatrics, 175(8), e211058. doi: 10.1001/jamapediatrics.2021.1058
Journal - Research Article
McKelvey, V., Darlow, B. A., Horwood, L. J., & Martin, J. (2021). Dental status of young adults born with very low birthweight: A national cohort study. Community Dentistry & Oral Epidemiology, 49, 240-248. doi: 10.1111/cdoe.12595
Journal - Research Article
McLeod, G. F. H., Horwood, J., Boden, J. M., & Woodward, L. J. (2021). Parental use of physical punishment in a birth cohort. New Zealand Medical Journal, 134(1534), 17-30. Retrieved from https://www.nzma.org.nz/journal
Journal - Research Article
Munn-Chernoff, M. A., Johnson, E. C., Chou, Y.-L., Coleman, J. R. I., Thornton, L. M., Walters, R. K., … Boden, J. M., … Horwood, L. J., … Pearson, J. F., … Jordan, J., Kennedy, M. A., … Agrawal, A. (2021). Shared genetic risk between eating disorder- and substance-use-related phenotypes: Evidence from genome-wide association studies. Addiction Biology, 26, e12880. doi: 10.1111/adb.12880
Journal - Research Article
Boden, J. M., Cleland, L., Dhakal, B., & Horwood, L. J. (2020). Attitudes towards cannabis and cannabis law change in a New Zealand birth cohort. New Zealand Medical Journal, 133(1515), 79-88. Retrieved from https://www.nzma.org.nz/journal
Journal - Research Article
Boden, J. M., Dhakal, B., Foulds, J. A., & Horwood, L. J. (2020). Life-course trajectories of cannabis use: A latent class analysis of a New Zealand birth cohort. Addiction, 115(2), 279-290. doi: 10.1111/add.14814
Journal - Research Article
Clare, P. J., Dobbins, T., Bruno, R., Peacock, A., Boland, V., Yuen, W. S., … Horwood, J., … McCambridge, J. (2020). The overall effect of parental supply of alcohol across adolescence on alcohol-related harms in early adulthood: A prospective cohort study. Addiction, 115, 1833-1843. doi: 10.1111/add.15005
Journal - Research Article
Darlow, B. A., Woodward, L. J., Levin, K. J., Melzer, T., & Horwood, L. J. (2020). Perinatal and childhood predictors of general cognitive outcome at 28 years in a very-low-birthweight national cohort. Developmental Medicine & Child Neurology, 62, 1423-1428. doi: 10.1111/dmcn.14649
Journal - Research Article
Johnson, E. C., Demontis, D., Thorgeirsson, T. E., Walters, R. K., Polimanti, R., Hatoum, A. S., … Boden, J., … Pearson, J. F., … Horwood, J., … Kennedy, M. A., … Agrawal, A. (2020). A large-scale genome-wide association study meta-analysis of cannabis use disorder. Lancet Psychiatry, 7, 1032-1045. doi: 10.1016/S2215-0366(20)30339-4
Journal - Research Article
Lee, J. O., Horwood, L. J., Lee, W. J., Hackman, D. A., McLeod, G. F. H., & Boden, J. M. (2020). Social causation, social selection, or common determinants? Examining competing explanations for the link between young adult unemployment and nicotine dependence. Nicotine & Tobacco Research, 22(11), 2006-2013. doi: 10.1093/ntr/ntz131
Journal - Research Article
Mulder, R. T., Horwood, L. J., & Tyrer, P. (2020). The borderline pattern descriptor in the International Classification of Diseases, 11th Revision: A redundant addition to classification. Australian & New Zealand Journal of Psychiatry, 54(11), 1095-1100. doi: 10.1177/0004867420951608
Journal - Research Article
Osborne, A. J., Pearson, J. F., Noble, A. J., Gemmell, N. J., Horwood, L. J., Boden, J. M., … Kennedy, M. A. (2020). Genome-wide DNA methylation analysis of heavy cannabis exposure in a New Zealand longitudinal cohort. Translational Psychiatry, 10, 114. doi: 10.1038/s41398-020-0800-3
Journal - Research Article
Spittlehouse, J. K., Boden, J. M., & Horwood, L. J. (2020). Sexual orientation and mental health over the life course in a birth cohort. Psychological Medicine, 50, 1348-1355. doi: 10.1017/S0033291719001284
Journal - Research Article
Yang, J., Kingsford, R. A., Horwood, J., Epton, M. J., Swanney, M. P., Stanton, J., & Darlow, B. A. (2020). Lung function of adults born at very low birth weight. Pediatrics, 145(2), e20192359. doi: 10.1542/peds.2019-2359
Journal - Research Article
Yuen, W. S., Chan, G., Bruno, R., Clare, P., Mattick, R., Aiken, A., … Horwood, J., … Peacock, A. (2020). Adolescent alcohol use trajectories: Risk factors and adult outcomes. Pediatrics, 146(4), e20200440. doi: 10.1542/peds.2020-0440
Journal - Research Article
Duncan, R., Horwood, J., Razvi, S., & Mulhern, S. (2020). Psychogenic nonepileptic seizures that remit when the diagnosis is given: Just good luck? Epilepsy & Behavior, 102, 106667. doi: 10.1016/j.yebeh.2019.106667
Journal - Research Other
Poulton, R., Robertson, K., Boden, J., Horwood, J., Theodore, R., Potiki, T., & Ambler, A. (2020). Patterns of recreational cannabis use in Aotearoa-New Zealand and their consequences: Evidence to inform voters in the 2020 referendum. Journal of the Royal Society of New Zealand, 50(2), 348-365. doi: 10.1080/03036758.2020.1750435
Journal - Research Other
Greer, C., Adamson, P., Harris, S., Horwood, J., Troughton, R., & Darlow, B. (2020). Very low birth weight is associate with reduced right ventricular function detected by strain imaging in early adulthood: Findings from a prospective cohort study. Heart, Lung & Circulation, 29(Suppl. 1), (pp. S2). doi: 10.1016/j.hlc.2020.05.007
Conference Contribution - Published proceedings: Abstract
Noble, A., Pearson, J., Boden, J., Horwood, J., Kennedy, M., & Osborne, A. (2020). Understanding the interaction between maternal tobacco use during pregnancy and adult offspring with conduct disorder. New Zealand Medical Journal, 133(1524), (pp. 144). Retrieved from https://www.nzma.org.nz/journal
Conference Contribution - Published proceedings: Abstract
Bell, C. J., Foulds, J. A., Horwood, L. J., Mulder, R. T., & Boden, J. M. (2019). Childhood abuse and psychotic experiences in adulthood: Findings from a 35-year longitudinal study. British Journal of Psychiatry, 214, 153-158. doi: 10.1192/bjp.2018.264
Journal - Research Article
Duncan, R., Mulder, R., Wilkinson, S. H., & Horwood, J. (2019). Medically unexplained symptoms and antecedent sexual abuse: An observational study of a birth cohort. Psychosomatic Medicine, 81, 622-628. doi: 10.1097/psy.0000000000000726
Journal - Research Article
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, 45, 427-436. doi: 10.1002/ab.21828
Journal - Research Article
Richards, A., Horwood, J., Boden, J., Kennedy, M., Sellers, R., Riglin, L., … Harold, G. T. (2019). Associations between schizophrenia genetic risk, anxiety disorders and manic/hypomanic episode in a longitudinal population cohort study. British Journal of Psychiatry, 214, 96-102. doi: 10.1192/bjp.2018.227
Journal - Research Article
Walker, G. H., Boden, J. M., Fergusson, D. M., & Horwood, L. J. (2019). Examining the associations between offending trajectories in adolescence/young adulthood and subsequent mental health disorders. Journal of Criminal Justice, 62, 94-100. doi: 10.1016/j.jcrimjus.2018.09.008
Journal - Research Article
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
Journal - Research Article
Osborne, A., Pearson, J., Gemmell, N., Boden, J., Horwood, J., & Kennedy, M. (2019). Methylome impacts of cannabis use in the Christchurch Health and Development Study. European Neuropsychopharmacology, 29(Suppl. 3), (pp. S851). doi: 10.1016/j.euroneuro.2017.08.125
Conference Contribution - Published proceedings: Abstract
Yuen, W. S., Chan, G. C. K., Clarke, P. J., Bruno, R., Boland, V., Aiken, A., … Horwood, J., … Peacock, A. (2019). Trajectories of adolescent alcohol consumption: A prospective cohort study. Drug & Alcohol Review, 38(Suppl. 1), (pp. S107-S108). doi: 10.1111/dar.12991
Conference Contribution - Published proceedings: Abstract
Horwood, J. (2019, October). Childhood adversity and mental health: Lifecourse implications. Verbal presentation at the Otago Spotlight Series: Mental Health Research, Wellington, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
Pearson, J., Osborne, A., Noble, A., Kennedy, M., Horwood, J., & Boden, J. (2019, August-September). Epigenetic impact of cannabis use in the Christchurch Health and Development Study. Verbal presentation at the Queenstown Molecular Biology (QMB) Meetings, Queenstown, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
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
Journal - Research Article
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
Journal - Research Article
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
Journal - Research Article
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, 113(10), 1811-1825. doi: 10.1111/add.14263
Journal - Research Article
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
Journal - Research Article
Horwood, J. (2018). Causal effect decomposition in the context of time varying exposures and mediators: An example. Proceedings of the World Psychiatric Association Epidemiology and Public Health Section Meeting. (pp. 16). Retrieved from https://www.erasmus.gr/microsites/1115
Conference Contribution - Published proceedings: Abstract
Pascoe, M., Melzer, T., Horwood, L. J., & Darlow, B. (2018). Adults born with very-low-birth-weight demonstrate alterations in grey matter volume, perfusion, and white matter integrity. In K. Hillman (Ed.), Proceedings of the 36th International Australasian Winter Conference on Brain Research. (pp. 71). AWCBR. Retrieved from https://www.otago.ac.nz/awcbr
Conference Contribution - Published proceedings: Abstract
Horwood, J. (2018, August). Child development study. Verbal presentation at the George Abbott Symposium & Festschrift for Emeritus Professor Brian Darlow, Christchurch, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
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
Journal - Research Article
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
Journal - Research Article
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
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., 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
Journal - Research Article
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
Journal - Research Article
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
Journal - Research Article
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
Journal - Research Article
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
Journal - Research Article
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
Journal - Research Article
McLeod, G. F. H., Fergusson, D. M., Horwood, L. J., Boden, J. M., & Carter, F. A. (2017, May). Prevalence and predictors of adiposity, a known risk factor for Type 2 diabetes. Verbal presentation at the New Zealand Society for the Study of Diabetes (NZSSD) Annual Scientific Meeting, Dunedin, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
Emeritus Professor