School of Sport, Exercise and Health Sciences


Dr Tom Norris PhD

Photo of Dr Tom Norris

Senior Research Associate in Epidemiology and Biostatistics

Tom graduated from Loughborough University in 2011 with a 1st in Human Biology. He then continued at Loughborough to pursue a PhD in Human Biology and Epidemiology, completing in 2015. Between 2015 and mid-2016, Tom was employed as a Research Associate in Epidemiology at the University of Bristol. He then moved to the University of Leicester to take up a Research Associate post (Pregnancy and Perinatal Epidemiology). He returned to Loughborough University in May 2018 to work on an MRC- funded project entitled ‘Body Size trajectories and cardio-metabolic resilience to obesity in three United Kingdom birth cohorts’.

Tom works primarily with birth cohort and longitudinal studies, predominantly in the UK, but also in China and North America. One of Tom’s interests is the production of growth references and he has produced several birth weight references for British, South Asian and Chinese populations. Tom is also interested in methods to model longitudinal data, particularly multilevel models, to produce trajectories of, for example, fetal and infant anthropometry. Tom has then used these trajectories as either outcome in themselves or to serve as exposures to relate to distal outcomes. He also has interests in causal inference methods used with observational data. 

Journal review (e.g. Ann Hum Biol, Br J Nutr, Int J Epidemiol, Public Health Nutr, Pediatr Obes, Psychoneuroendocrinology)

  • Norris, T., Souza, R.T., Xia, Y., Zhang, T., Rowan, A., Gallier, S., Zhang, H., Qi, H-B., Baker, P.N. 2019. Effect of supplementation of complex milk lipids in pregnancy on fetal growth: results from the Complex Lipids in Mothers and Babies (CLIMB) randomized controlled trial. The Journal of Maternal-Fetal & Neonatal Medicine.
  • Zhao, X., Xia, Y., Zhang, H., Baker, P.N. & Norris, T. 2019. Birth weight charts for a Chinese population: an analysis of 338,454 births in Chongqing. BMC Pediatrics. doi:
  • Norris, T., Bann, D., Hardy, R. & Johnson, W.O. Socioeconomic inequalities in childhood-to-adulthood BMI tracking in three British birth cohorts. International Journal of Obesity. doi: 10.1038/s41366-019-0387-z
  • Norris, T., Ramel, S.E., Catalano, P., ni Caoimh, C., Roggero, P., Murray, D., Fields, D. A., Demerath, E.W. & Johnson, W. New charts for the assessment of body composition, according to air-displacement plethysmography, at birth and across the first six months of life. American Journal of Clinical Nutrition. doi:
  • Pradeilles, R., Norris, T., Ferguson, E., Gazdar, H., Mazhar, S., Bux Mallah, H., Budhani, A., Mehmood, R., Aslam, S., Dangour, A.D., Allen, E., 2018. Factors associated with catch-up growth in early infancy in rural Pakistan: a longitudinal analysis of the Women's Work and Nutrition Study. Maternal and Child Nutrition. doi: 10.1111/mcn.12733
  • Norris, T., Johnson, W.O., Petherick, E., Cameron, N., et al. 2018. Investigating the relationship between fetal growth and academic attainment: secondary analysis of the Born in Bradford (BiB) cohort. International Journal of Epidemiology. doi: 10.1093/ije/dyy157
  • Johnson, W.O., Bell, J., Robson, E., Norris, T., Kivimaki, M. & Hamer, M. 2018. Worse baseline risk factors explain the association of healthy obesity with increased mortality risk: Whitehall II Study. International Journal of Obesity. doi: 10.1038/s41366-018-0192-0.
  • Collin, S.M., Norris, T., Gringras, P., Blair, P.S., Tilling, K. & Crawley, E. 2018. Childhood sleep and adolescent chronic fatigue syndrome (CFS/ME): evidence of associations in a UK birth cohort. Sleep Medicine. doi:  10.1016/j.sleep.2018.01.005
  • Collin, S.M., Norris, T., Deere, K.C., Jago, R., Ness, A.R., Crawley, E. 2018. Physical activity at age 11 years and chronic disabling fatigue at ages 13 and 16 years in a UK birth cohort. Arch Dis Child. doi: 10.1136/archdischild-2017-314138
  • Hawton, K., Norris, T., Crawley, E., Shield, J.P.H. 2018. Is child abuse associated with adolescent obesity? A population cohort study. Child Obes. doi: 10.1089/chi.2017.0141.
  • Norris, T., Seaton, S., Manktelow, B., Baker, P.N., Kurinczuk, J., Field, D., Draper, S., Smith, L. 2017. Updated birth weight centiles for England and Wales. Arch Dis Child Fetal Neonatal Ed. doi: 10.1136/archdischild-2017-313452
  • Norris, T., McCarthy, F.P., Khashan, A.S., Murray, D., Kiely, M., Hourihane, J.O’B., Baker, P.N., Kenny, L.C. 2017. Do changing levels of maternal exercise during pregnancy affect neonatal adiposity? Secondary analysis of the babies after SCOPE: evaluating the longitudinal impact using neurological and nutritional endpoints (BASELINE) birth cohort (Cork, Ireland). BMJ Open. doi: 10.1136/bmjopen-2017-017987
  • Norris, T., Manktelow, B.N., Smith, L.K. & Draper, E.S. 2017. Causes and temporal changes in nationally collected stillbirth audit data in high-resource settings. Semin Fetal Neonatal Med. doi: 10.1016/j.siny.2017.02.003.