Overview
I develop novel statistical theory and methodology, and collaborate with colleagues in Cardiff and beyond on applications to epidemiology, clinical medicine, and public health. I have longstanding interests in repeated measurements, causal inference, and missing data.
I maintain a particular focus on regression models, using ideas from abstract algebra (group actions on affine spaces, for example) to explore their structure and composition. Group actions can be combined to create new kinds of statistical models, and affine spaces shed light on subtle notions like Simpson's paradox.
Publication
2026
- Chatfield, M. D. et al., 2026. Characterizing the back-transformed standard deviation and closely related quantities [Letter]. Communications in Statistics - Theory and Methods 55 (7), pp.5663-5668. (10.1080/03610926.2026.2649788)
- Chatfield, M. D. et al., 2026. Report tau or exp(tau) rather than tau-squared in random-effects meta-analyses. Research Synthesis Methods 17 (4), pp.830-834. (10.1017/rsm.2026.10075)
- Farewell, D. M. et al. 2026. Regression by composition. Journal of the Royal Statistical Society: Statistical Methodology Series B (10.1093/jrsssb/qkag112)
- Underwood, J. et al. 2026. Risk of dementia after bloodstream infection - a nationwide propensity score matched cohort study. Age and Ageing 55 (6) afag178. (10.1093/ageing/afag178)
- Roberts, R. et al. 2026. Reproducibility of echocardiographic measurements of left ventricular systolic function: a systematic review and meta-analysis comparing artificial intelligence and clinician estimates. European Heart Journal – Digital Health 7 (3) ztaf145. (10.1093/ehjdh/ztaf145)
- Sanyaolu, L. et al. 2026. Prophylactic antibiotics to prevent recurrent UTIs and risk of antibiotic resistance: target trial emulation using the SAIL Databank. The Lancet Obstetrics, Gynaecology, & Women’s Health 2 (3), pp.e209-e217. (10.1016/S3050-5038(25)00178-5)
2025
- Ponsford, M. et al. 2025. TAP-I Deficiency presenting with chronic granulomatous rubella virus-driven cutaneous ulceration: a case report and scoping literature review. Journal of Clinical Immunology 46 1. (10.1007/s10875-025-01919-6)
- Currie, J. et al. 2025. Exploring the equity of distribution of general medical services funding allocations in Wales: a time-series analysis. BJGP Open 9 (1) 0080. (10.3399/BJGPO.2024.0080)
- Chatfield, M. D. et al., 2025. Mean relative error and standard relative deviation. Statistica Neerlandica 79 (1) e70001. (10.1111/stan.70001)
2024
- Ahmed, H. et al. 2024. Antibiotic prescribing patterns and risk of antibiotic-resistant infections and clostridium difficile in Warfarin and direct oral anticoagulant users: matched population-based cohort study. Discover Public Health 21 (1) 132. (10.1186/s12982-024-00263-1)
- Chatfield, M. D. et al., 2024. blandaltman: A command to create variants of Bland–Altman plots. The Stata Journal: Promoting communications on statistics and Stata 23 (3), pp.851-874. (10.1177/1536867x231196488)
- Daniel, R. M. , Farewell, D. M. and Huitfeldt, A. 2024. ‘Does God toss logistic coins?’ and other questions that motivate regression by composition. Journal of the Royal Statistical Society, Series A (Statistics in Society) 187 (3), pp.636–655. (10.1093/jrsssa/qnae074)
- Imtiaz, A. et al., 2024. ChatGPTversusBing: a clinician assessment of the accuracy of AI platforms when responding to COPD questions. European Respiratory Journal 63 (6) 2400163. (10.1183/13993003.00163-2024)
- Ahmed, H. et al. 2024. Risk of bleeding amongst warfarin and direct oral anticoagulant users prescribed immediate antibiotics for respiratory tract infection: cohort study. Pharmacoepidemiology & Drug Safety 33 (5) e5794. (10.1002/pds.5794)
2022
- Gadalla, A. et al. 2022. Antibiotic consumption and time to recovery from uncomplicated urinary tract infection: secondary analysis of observational data from a point-of-care test trial. British Journal of General Practice 72 (725), pp.882-890. (10.3399/BJGP.2022.0011)
- Farewell, D. , Daniel, R. and Seaman, S. 2022. Missing at random: a stochastic process perspective. Biometrika 109 (1), pp.227-241. (10.1093/biomet/asab002)
- Fallowfield, L. J. et al., 2022. IMPARTER, Phase 1 of an intervention to improve patients' understanding of gene expression profiling tests in breast cancer. Breast Cancer Research and Treatment (10.1007/s10549-021-06491-2)
2021
- Ponsford, M. J. et al. 2021. Burden of nosocomial COVID-19 in Wales: results from a multicentre retrospective observational study of 2508 hospitalised adults. Thorax 76 (12), pp.1246-1249. (10.1136/thoraxjnl-2021-216964)
- Ponsford, M. J. et al. 2021. A systematic review and meta-analysis of inpatient mortality associated with nosocomial and community COVID-19 exposes the vulnerability of immunosuppressed adults. Frontiers in Immunology 12 744696. (10.3389/fimmu.2021.744696)
- Acton, J. H. et al. 2021. Response to Comment on: Agreement between optometrists and ophthalmologists in the certification for vision impairment. Eye 35 , pp.2325-2326. (10.1038/s41433-020-01143-z)
- Kemp, A. M. et al. 2021. Can TEN4 distinguish bruises from abuse, inherited bleeding disorders or accidents?. Archives of Disease in Childhood 106 (8), pp.774-779. (10.1136/archdischild-2020-320491)
- Daniel, R. , Zhang, J. and Farewell, D. 2021. Making apples from oranges: Comparing noncollapsible effect estimators and their standard errors after adjustment for different covariate sets. Biometrical Journal 63 (3), pp.528-557. (10.1002/bimj.201900297)
- Trefan, L. et al. 2021. Visualisation and optimisation of alcohol-related hospital admission ICD-10 codes in Welsh e-cohort data. International Journal of Population Data Science 6 (1) 09. (10.23889/ijpds.v6i1.1373)
- Bartlett, R. et al. 2021. Agreement between ophthalmologists and optometrists in the certification of vision impairment. Eye 35 , pp.433-440. (10.1038/s41433-020-0860-x)
- Evans, A. et al. 2021. Association of asthma severity and educational attainment at age 6-7 years in a birth cohort: population-based record-linkage study. Thorax 76 (2)(10.1136/thoraxjnl-2020-215422)
- Ponsford, M. J. et al. 2021. Increased respiratory viral detection and symptom burden among patients with primary antibody deficiency: results from the BIPAD study. The Journal of Allergy and Clinical Immunology: In Practice 9 (2), pp.735-744.e6. (10.1016/j.jaip.2020.08.016)
- Lewis, R. D. et al. 2021. Complement activation in polycystic ovary syndrome occurs in the post-prandial and fasted state, and is influenced by obesity and insulin sensitivity. Clinical Endocrinology 94 (1), pp.74-84. (10.1111/cen.14322)
- Chatfield, M. D. and Farewell, D. 2021. Understanding between-cluster variation in prevalence, and limits for how much variation is plausible. Statistical Methods in Medical Research 30 (1), pp.286-298. (10.1177/0962280220951831)
- Ahmed, H. et al. 2021. Respiratory tract infection and risk of bleeding in oral anticoagulant users: self-controlled case series. British Medical Journal 2021 375. (10.1136/bmj-2021-068037)
- Ashworth, I. et al. 2021. Telomere length in Cystic Fibrosis patients - are patients with CF ageing too quickly?. International Journal of Aging Research 4 90. (10.28933/ijoar-2021-06-2005)
2020
- Evans, A. et al. 2020. Adverse childhood experiences during childhood and academic attainment at age 7 and 11 years: an electronic birth cohort study. Public Health 189 , pp.37-47. (10.1016/j.puhe.2020.08.027)
- Greene, G. et al. 2020. Improving mental health through neighbourhood regeneration: the role of cohesion, belonging, quality and disorder. European Journal of Public Health 30 (5), pp.964-966. (10.1093/eurpub/ckz221)
- Adekanmbi, V. et al. 2020. Antibiotic use and deprivation: an analysis of Welsh primary care antibiotic prescribing data by socioeconomic status. Journal of Antimicrobial Chemotherapy 75 (8), pp.2363–2371. (10.1093/jac/dkaa168)
- Gartner, A. et al. 2020. Demographic and socioeconomic patterns in the risk of alcohol-related hospital admission in children and young adults with childhood onset type-1 diabetes from a record-linked longitudinal population cohort study in Wales. Pediatric Diabetes 21 (7), pp.1333-1342. (10.1111/pedi.13089)
- Ponsford, M. J. et al. 2020. Clinical and laboratory characteristics of clozapine-treated patients with schizophrenia referred to a national immunodeficiency clinic reveals a B-cell signature resembling common variable immunodeficiency (CVID). Journal of Clinical Pathology 73 , pp.587-592. (10.1136/jclinpath-2019-206235)
- Christofides, S. R. et al. 2020. The influence of migratory Paraburkholderia on growth and competition of wood-decay fungi. Fungal Ecology 45 100937. (10.1016/j.funeco.2020.100937)
- Watkins, W. J. et al. 2020. Modelling predictive gender- and gestation-specific weight reference centiles for preterm infants using a population-based cohort study. Scientific Reports 10 4302. (10.1038/s41598-020-60895-6)
- Greene, G. et al. 2020. Mental health selection: common mental disorder and migration between multiple states of deprivation in a UK cohort. BMJ Open 10 (2) e033238. (10.1136/bmjopen-2019-033238)
2019
- Gartner, A. et al. 2019. Drinking beer, wine or spirits - does it matter for inequalities in alcohol-related hospital admission? A record-linked longitudinal study in Wales. BMC Public Health 19 1651. (10.1186/s12889-019-8015-3)
- Cowley, L. et al. 2019. Methodological standards for the development and evaluation of clinical prediction rules: A review of the literature. Diagnostic and Prognostic Research 3 16. (10.1186/s41512-019-0060-y)
- Ahmed, H. et al. 2019. Impact of antibiotic treatment duration on outcomes in older men with suspected urinary tract infection: retrospective cohort study. Pharmacoepidemiology and Drug Safety 28 (6), pp.857-866. (10.1002/pds.4791)
- Trefan, L. et al. 2019. Epidemiology of alcohol-related emergency hospital admissions in children and adolescents: an e-cohort analysis in Wales in 2006-2011. PLoS ONE 14 (6) e0217598. (10.1371/journal.pone.0217598)
- Ahmed, H. et al. 2019. Choice of empirical antibiotic therapy and adverse outcomes in older adults with suspected urinary tract infection: cohort study. Open Forum Infectious Diseases 6 (3), pp.-. ofz039. (10.1093/ofid/ofz039)
- Ahmed, H. et al. 2019. Antibiotic prophylaxis and clinical outcomes among older adults with recurrent urinary tract infection: cohort study. Age and Ageing 48 (2), pp.228-234. (10.1093/ageing/afy146)
- Ponsford, M. et al. 2019. Clozapine is associated with secondary antibody deficiency. British Journal of Psychiatry 214 (2), pp.83-89. (10.1192/bjp.2018.152)
- McQuire, C. et al. 2019. Screening prevalence of fetal alcohol spectrum disorders in a region of the United Kingdom: a population-based birth-cohort study. Preventive Medicine 118 , pp.344-351. (10.1016/j.ypmed.2018.10.013)
- Trefan, L. et al. 2019. Electronic Longitudinal Alcohol Study in Communities (ELAStiC) Wales - protocol for platform development. International Journal of Population Data Science 4 (1) 14. (10.23889/ijpds.v4i1.581)
2018
- Cowley, L. E. , Farewell, D. M. and Kemp, A. M. 2018. Potential impact of the validated Predicting Abusive Head Trauma (PredAHT) clinical prediction tool: A clinical vignette study. Child Abuse and Neglect 86 , pp.184-196. (10.1016/j.chiabu.2018.09.017)
- Ahmed, H. et al. 2018. Risk of adverse outcomes following urinary tract infection in older people with renal impairment: retrospective cohort study using linked health record data. PLoS Medicine 15 (9) e1002652. (10.1371/journal.pmed.1002652)
- Cowley, L. et al. 2018. Letter to the editor. Law, Probability and Risk 17 (3), pp.275-277. (10.1093/lpr/mgy002)
- Powell, W. E. et al. 2018. Loss of CXCR3 expression on memory B cells in individuals with long-standing type 1 diabetes. Diabetologia 61 , pp.1794-1803. (10.1007/s00125-018-4651-x)
- Cowley, L. et al. 2018. Factors influencing child protection professionals' decision-making and multidisciplinary collaboration in suspected abusive head trauma cases: a qualitative study. Child Abuse & Neglect 82 , pp.178-191. (10.1016/j.chiabu.2018.06.009)
- McNulty, P. et al., 2018. Reduced cancer incidence in Huntington's disease: analysis in the Registry study. Journal of Huntington's Disease 7 (3), pp.209-222. (10.3233/JHD-170263)
- Cowley, L. E. et al. 2018. Acceptability of the Predicting Abusive Head Trauma (PredAHT) clinical prediction tool: A qualitative study with child protection professionals. Child Abuse and Neglect 81 , pp.192-205. (10.1016/j.chiabu.2018.04.022)
- Paranjothy, S. et al. 2018. Risk of emergency hospital admission in children associated with mental disorders and alcohol misuse in the household: an electronic birth cohort study. Lancet Public Health 3 (6), pp.e279-e288. (10.1016/S2468-2667(18)30069-0)
- Gartner, A. et al. 2018. Does selective migration alter socioeconomic inequalities in mortality in Wales?: a record-linked total population e-cohort study. SSM - Population Health 5 , pp.48-54. (10.1016/j.ssmph.2018.05.004)
- Bowden, B. et al., 2018. Risk of suicide following an alcohol-related emergency hospital admission: an electronic cohort study of 2.8 million people. PLoS ONE 13 (4) e0194772. (10.1371/journal.pone.0194772)
- King, W. et al., 2018. Socioeconomic inequality in medication persistence in primary and secondary prevention of coronary heart disease - a population-wide electronic cohort study. PLoS ONE 13 (3) e0194081. (10.1371/journal.pone.0194081)
- Collins, J. T. et al. 2018. The value of physical performance measurements alongside assessment of sarcopenia in predicting receipt and completion of planned treatment in non-small cell lung cancer: an observational exploratory study. Supportive Care in Cancer 26 , pp.119-127. (10.1007/s00520-017-3821-6)
- Ahmed, H. et al. 2018. Incidence and antibiotic prescribing for clinically diagnosed urinary tract infection in older adults in UK primary care, 2004-2014. PLoS ONE 13 (1) e0190521. (10.1371/journal.pone.0190521)
- Paljarvi, T. et al. 2018. Feasibility of consumer-level activity monitors: Attitudes, user experiences, and accuracy of activity data. Presented at: 7th International Society for Physical Activity and Health Congress London, England 15-17 October 2018. Human Kinetics. (10.1123/jpah.2018-0535)
2017
- Lauder, S. N. et al. 2017. Networks of enzymatically oxidized membrane lipids support calcium-dependent coagulation factor binding to maintain hemostasis. Science Signaling 10 (507) eaan2787. (10.1126/scisignal.aan2787)
- White, J. et al. 2017. Improving mental health through the regeneration of deprived neighborhoods: a natural experiment. American Journal of Epidemiology 186 (4), pp.473-480. (10.1093/aje/kwx086)
- Farewell, D. M. , Huang, C. and Didelez, V. 2017. Ignorability for general longitudinal data. Biometrika 104 (2), pp.317-326. (10.1093/biomet/asx020)
- Lewis, C. et al. 2017. Internet-based guided self-help for post-traumatic stress disorder (PTSD): randomised controlled trial. Depression and Anxiety 34 (6), pp.555-565. (10.1002/da.22645)
- Huang, C. , Farewell, D. and Pan, J. 2017. A calibration method for non-positive definite covariance matrix in multivariate data analysis. Journal of Multivariate Analysis 157 , pp.45-52. (10.1016/j.jmva.2017.03.001)
- Ahmed, H. et al. 2017. Long-term antibiotics for prevention of recurrent urinary tract infection in older adults: systematic review and meta-analysis of randomised trials. BMJ Open 7 (5), pp.e015233. (10.1136/bmjopen-2016-015233)
- King, W. et al., 2017. Equity in healthcare for coronary heart disease, Wales (UK) 2004-2010: A population-based electronic cohort study. PLoS ONE 12 (3) e0172618. (10.1371/journal.pone.0172618)
- Gillespie, D. et al. 2017. Determinants of initiation, implementation, and discontinuation of amoxicillin by adults with acute cough in primary care. Patient Preference and Adherence 2017 (11), pp.561-569. (10.2147/PPA.S119256)
- Gillespie, D. et al. 2017. The use of randomisation-based efficacy estimators in non-inferiority trials. Trials 18 (1) 117. (10.1186/s13063-017-1837-3)
- Williams, D. et al. 2017. Women’s perspectives on human papillomavirus self-sampling in the context of the UK cervical screening programme. Health Expectations (10.1111/hex.12544)
2016
- Seaman, S. R. , Farewell, D. and White, I. R. 2016. Linear increments with non-monotone missing data and measurement error. Scandinavian Journal of Statistics 43 (4), pp.996 -1018. (10.1111/sjos.12225)
- White, J. et al. 2016. Improving mental health through the regeneration of deprived neighbourhoods: a prospective controlled quasi-experimental study. The Lancet 388 (Supp 2), pp.S110. (10.1016/S0140-6736(16)32346-7)
- Leung, A. M. H. et al., 2016. Defining criteria for rheumatoid arthritis patient-derived disease activity score that correspond to Disease Activity Score 28 and Clinical Disease Activity Index based disease states and response criteria. Rhuematology 55 (11), pp.1954-1958. (10.1093/rheumatology/kew279)
- O'Keeffe, A. G. et al., 2016. Multiple imputation of missing composite outcomes in longitudinal data. Statistics in Biosciences 8 (2), pp.310-332. (10.1007/s12561-016-9146-z)
- McQuire, C. et al. 2016. Objective measures of prenatal alcohol exposure: a systematic review. Pediatrics 138 (3) e20160517. (10.1542/peds.2016-0517)
- Farewell, V. T. and Farewell, D. M. 2016. Study design. Diagnostic Histopathology 22 (7), pp.246-252. (10.1016/j.mpdhp.2016.06.003)
- Maguire, S. A. et al. 2016. Theoretical re-analysis of two previously published datasets. The Journal of Pediatrics 171 , pp.321. (10.1016/j.jpeds.2016.01.021)
- Fone, D. et al. 2016. Change in alcohol outlet density and alcohol-related harm to population health (CHALICE): a comprehensive record-linked database study in Wales. Public Health Research 4 (3), pp.1-184. (10.3310/phr04030)
2015
- Gillespie, D. et al. 2015. The use of randomisation-based efficacy estimators in non-inferiority trials [Poster Presentation]. Trials 16 (Suppl), pp.P129. (10.1186/1745-6215-16-S2-P129)
- Cowley, L. et al. 2015. Validation of a Prediction Tool for Abusive Head Trauma. Pediatrics 136 (2), pp.290-298. (10.1542/peds.2014-3993)
- Gillespie, D. et al. 2015. Adherence-adjusted estimates of benefits and harms from treatment with amoxicillin for LRTI: secondary analysis of a 12-country randomised placebo- controlled trial using randomisation- based efficacy estimators. BMJ Open 5 e006160. (10.1136/bmjopen-2014-006160)
2014
- Fone, D. et al. 2014. Effect of neighbourhood deprivation and social cohesion on mental health inequality: a multilevel population-based longitudinal study. Psychological Medicine 44 (11), pp.2449-2460. (10.1017/S0033291713003255)
- Matthews, J. N. S. et al., 2014. Dropout in crossover and longitudinal studies: is complete case so bad?. Statistical Methods in Medical Research 23 (1), pp.60-73. (10.1177/0962280212445838)
- Gillespie, D. et al. 2014. Electronic monitoring of medication adherence in a 1-year clinical study of 2 dosing regimens of mesalazine for adults in remission with ulcerative colitis. Inflammatory Bowel Diseases 20 (1), pp.82-91. (10.1097/01.MIB.0000437500.60546.2a)
2013
- Jenkins, V. et al., 2013. Teams Talking Trials: Results of an RCT to improve the communication of cancer teams about treatment trials. Contemporary Clinical Trials 35 (1), pp.43-51. (10.1016/j.cct.2013.02.003)
- Fone, D. L. et al. 2013. Socioeconomic patterning of excess alcohol consumption and binge drinking: a cross-sectional study of multilevel associations with neighbourhood deprivation. BMJ Open 3 (4) e002337. (10.1136/bmjopen-2012-002337)
- Jenkins, V. et al., 2013. Drivers and barriers to patient participation in RCTs. British Journal of Cancer 108 (7), pp.1402-1407. (10.1038/bjc.2013.113)
- Farewell, T. , Farewell, V. and Farewell, D. 2013. Assessing measures of map value for thematic maps with sparse data. International Journal of Remote Sensing 34 (8), pp.2655-2671. (10.1080/01431161.2012.747020)
- Fone, D. L. et al. 2013. Cohort Profile: The Caerphilly Health and Social Needs Electronic Cohort Study (E-CATALyST). International Journal of Epidemiology 42 (6), pp.1620-1628. (10.1093/ije/dys175)
- Fone, D. L. et al. 2013. Cohort Profile: The Caerphilly Health and Social Needs Electronic Cohort Study (E-CATALyST). International Journal of Epidemiology 42 (6), pp.1620-1628. (10.1093/ije/dys175)
- Fone, D. L. et al. 2013. Common mental disorders, neighbourhood income inequality and income deprivation: small-area multilevel analysis. British Journal of Psychiatry 202 (4), pp.286-293. (10.1192/bjp.bp.112.116178)
2012
- Farewell, D. , Tahir, T. A. and Bisson, J. I. 2012. Statistical methods in randomised controlled trials for delirium. Journal of Psychosomatic Research 73 (3), pp.197-204. (10.1016/j.jpsychores.2012.06.002)
- Ho, W. K. et al., 2012. Dropouts in the AB/BA crossover design. Statistics in Medicine 31 (16), pp.1675-1687. (10.1002/sim.4497)
- Tahir, T. , Farewell, D. and Bisson, J. I. 2012. Randomised control trials for delirium: Current evidence and statistical methods [Letter]. Journal of Psychosomatic Research 72 (1), pp.84-85. (10.1016/j.jpsychores.2011.11.002)
2011
- Ford, E. et al., 2011. Clinicians' attitudes towards clinical trials of cancer therapy. British Journal of Cancer 104 (10), pp.1535-1543. (10.1038/bjc.2011.119)
- Gartner, A. et al. 2011. Rural/urban mortality differences in England and Wales and the effect of deprivation adjustment. Social Science & Medicine 72 (10), pp.1685-1694. (10.1016/j.socscimed.2011.03.017)
- Maguire, S. A. et al. 2011. Estimating the probability of abusive head trauma: a pooled analysis. Pediatrics 128 (3), pp.e550-e564. (10.1542/peds.2010-2949)
2010
- Elgmati, E. , Farewell, D. and Henderson, R. 2010. A martingale residual diagnostic for longitudinal and recurrent event data. Lifetime Data Analysis 16 (1), pp.118-135. (10.1007/s10985-009-9129-1)
- Farewell, D. 2010. Marginal analyses of longitudinal data with an informative pattern of observations. Biometrika 97 (1), pp.65-78. (10.1093/biomet/asp068)
- Farewell, D. and Henderson, R. 2010. Longitudinal perspectives on event history analysis. Lifetime Data Analysis 16 (1), pp.102-117. (10.1007/s10985-009-9137-1)
- Farewell, T. S. and Farewell, D. 2010. Knowledge-based soil attribute mapping in GIS: corrections and extensions to the expector method. Transactions in GIS 14 (2), pp.183-192. (10.1111/j.1467-9671.2010.01190.x)
- Jenkins, V. et al., 2010. The attitudes of 1066 patients with cancer towards participation in randomised clinical trials. British Journal of Cancer 103 (12), pp.1801-1807. (10.1038/sj.bjc.6606004)
- Tahir, T. et al. 2010. A randomized controlled trial of quetiapine versus placebo in the treatment of delirium. Journal of Psychosomatic Research 69 (5), pp.485-490. (10.1016/j.jpsychores.2010.05.006)
2009
- Maguire, S. A. et al. 2009. Which clinical features distinguish inflicted from non-inflicted brain injury? A systematic review. Archives of Disease in Childhood 94 (11), pp.860-867. (10.1136/adc.2008.150110)
- Gunnes, N. et al., 2009. Analysis of censored discrete longitudinal data: estimation of mean response. Statistics in Medicine 28 (4), pp.605-624. (10.1002/sim.3492)
- Kemp, A. M. et al. 2009. What neuroimaging should be performed in children in whom inflicted brain injury (iBI) is suspected? A systematic review. Clinical Radiology 64 (5), pp.473-483. (10.1016/j.crad.2008.11.011)
2008
- Gartner, A. et al. 2008. Differences in mortality between rural and urban areas in England and Wales, 2002-04. Health Statistics Quarterly 39 , pp.6-13.
- Buck, R. et al. 2008. Health and well-being in work in Merthyr Tydfil: a bio-psychosocial appraoch. Wellbeing in Work Stage 2 Final Report to the Wales Centre for Health and the Welsh Assembly Government. Project Report.Wellbeing in Work Partnership.
2007
- Diggle, P. , Farewell, D. and Henderson, R. 2007. Analysis of longitudinal data with drop-out: objectives, assumptions and a proposal (with discussion). Journal of the Royal Statistical Society Series C (Applied statistics) 56 (5), pp.499-550. (10.1111/j.1467-9876.2007.00590.x)
2006
- Fone, D. L. , Farewell, D. and Dunstan, F. D. J. 2006. An ecometric analysis of neighbourhood cohesion. Population Health Metrics 4 (1), pp.4-17. (10.1186/1478-7954-4-17)
- Farewell, D. 2006. Study design and statistical analysis: a practical guide for clinicians. Mitchell H. Katz. Cambridge: Cambridge University Press [Review]. Journal of Public Health 28 (4), pp.398. (10.1093/pubmed/fdl063)
- Glümer, C. et al., 2006. What determines the cost-effectiveness of diabetes screening?. Diabetologia 49 (7), pp.1536-1544. (10.1007/s00125-006-0248-x)
Articles
- Chatfield, M. D. et al., 2026. Characterizing the back-transformed standard deviation and closely related quantities [Letter]. Communications in Statistics - Theory and Methods 55 (7), pp.5663-5668. (10.1080/03610926.2026.2649788)
- Chatfield, M. D. et al., 2026. Report tau or exp(tau) rather than tau-squared in random-effects meta-analyses. Research Synthesis Methods 17 (4), pp.830-834. (10.1017/rsm.2026.10075)
- Farewell, D. M. et al. 2026. Regression by composition. Journal of the Royal Statistical Society: Statistical Methodology Series B (10.1093/jrsssb/qkag112)
- Underwood, J. et al. 2026. Risk of dementia after bloodstream infection - a nationwide propensity score matched cohort study. Age and Ageing 55 (6) afag178. (10.1093/ageing/afag178)
- Roberts, R. et al. 2026. Reproducibility of echocardiographic measurements of left ventricular systolic function: a systematic review and meta-analysis comparing artificial intelligence and clinician estimates. European Heart Journal – Digital Health 7 (3) ztaf145. (10.1093/ehjdh/ztaf145)
- Sanyaolu, L. et al. 2026. Prophylactic antibiotics to prevent recurrent UTIs and risk of antibiotic resistance: target trial emulation using the SAIL Databank. The Lancet Obstetrics, Gynaecology, & Women’s Health 2 (3), pp.e209-e217. (10.1016/S3050-5038(25)00178-5)
- Ponsford, M. et al. 2025. TAP-I Deficiency presenting with chronic granulomatous rubella virus-driven cutaneous ulceration: a case report and scoping literature review. Journal of Clinical Immunology 46 1. (10.1007/s10875-025-01919-6)
- Currie, J. et al. 2025. Exploring the equity of distribution of general medical services funding allocations in Wales: a time-series analysis. BJGP Open 9 (1) 0080. (10.3399/BJGPO.2024.0080)
- Chatfield, M. D. et al., 2025. Mean relative error and standard relative deviation. Statistica Neerlandica 79 (1) e70001. (10.1111/stan.70001)
- Ahmed, H. et al. 2024. Antibiotic prescribing patterns and risk of antibiotic-resistant infections and clostridium difficile in Warfarin and direct oral anticoagulant users: matched population-based cohort study. Discover Public Health 21 (1) 132. (10.1186/s12982-024-00263-1)
- Chatfield, M. D. et al., 2024. blandaltman: A command to create variants of Bland–Altman plots. The Stata Journal: Promoting communications on statistics and Stata 23 (3), pp.851-874. (10.1177/1536867x231196488)
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Conferences
- Paljarvi, T. et al. 2018. Feasibility of consumer-level activity monitors: Attitudes, user experiences, and accuracy of activity data. Presented at: 7th International Society for Physical Activity and Health Congress London, England 15-17 October 2018. Human Kinetics. (10.1123/jpah.2018-0535)
Monographs
- Buck, R. et al. 2008. Health and well-being in work in Merthyr Tydfil: a bio-psychosocial appraoch. Wellbeing in Work Stage 2 Final Report to the Wales Centre for Health and the Welsh Assembly Government. Project Report.Wellbeing in Work Partnership.
Biography
Education and qualifications
- 2006: PhD (Statistics), Lancaster University
- 2002: MMath (Mathematics), Oxford University
Career overview
- 2022-present: Professor, Cardiff University
- 2018-2022: Reader, Cardiff University
- 2015-2018: Senior Lecturer, Cardiff University
- 2010-2015: MRC Methodology Fellow, Cardiff University
- 2007-2010: MRC/WAG Training Fellow in Health Services Research/Health of the Public, Cardiff University
- 2005-2007: Research Associate, Cardiff University
Honours and awards
- MRC Centenary Award, 2012-2013
- Royal Statistical Society Research Prize, June 2011
Professional memberships
- International Biometric Society
- Royal Statistical Society
Supervisions
External supervision
Faculty of Medicine
The University of Queensland
Australia
Department for Health
University of Bath
Faculty of Humanities and Social Sciences
Past projects
Contact Details
[email protected]
+44 29206 87247
Neuadd Meirionnydd, University Hospital of Wales, Heath Park, Cardiff, CF14 4YS
+44 29206 87247
Neuadd Meirionnydd, University Hospital of Wales, Heath Park, Cardiff, CF14 4YS
Research themes
Specialisms
- Statistics