Biography

Dr Ivonne Solis-Trapala is a Senior Lecturer in Medical Statistics at Keele University. She obtained her PhD in Statistics from the University of Cambridge in 2004. Before joining Keele in 2015, she worked as a Senior Biostatistician at MRC Human Nutrition Research in Cambridge. Prior to this, Ivonne held a 4-year MRC Career Development Fellowship
in Biostatistics at Lancaster University. 

Ivonne’s research focuses on applied and methodological aspects of statistics, particularly in nutritional biostatistics, secondary care and cancer research. Ivonne is the Deputy Director of the Keele Hub of the NIHR Research Design Service for the West Midlands. She is a member of Keele’s Biostatistics Group, Renal Research Group and Institute for Global Health within the School of Primary, Community and Social Care.

Research and scholarship

The main strands within Dr Solis-Trapala’s research portfolio of applied and methodological statistics are:

  • Semicontinuous data and measurement error with application to nutritional biostatistics
  • Statistical modelling of complex multivariate dependent data
  • Graphical Markov modelling
  • Analysis of time-to-event data.

Further information

Dr Solis-Trapala is a fellow of the Royal Statistical Society. She sits on several external Trial Steering Committees, some as chair, and is a regular reviewer for leading UK research funders, including NIHR Health Technology Assessment, NIHR Health Services and Delivery Research, MRC, EPSRC and ESRC.

Selected Publications

  • Lawson CA, Solis-Trapala I, Dahlstrom U, Mamas M, Jaarsma T, Kadam UT, Stromberg A. 2018. Comorbidity health pathways in heart failure patients: A sequences-of-regressions analysis using cross-sectional data from 10,575 patients in the Swedish Heart Failure Registry. PLoS Med, e1002540, vol. 15(3). link> doi> full text>
  • Fallowfield L, Solis-Trapala I, Menon U, Langridge C, May S, Jacobs I, Jenkins V. 2017. The effect of ovarian cancer screening on sexual activity and functioning: results from the UK collaborative trial of ovarian cancer screening RCT. Br J Cancer, 1111-1117, vol. 116(8). link> doi> full text>
  • Chernova J and Solis-Trapala I. 2016. A simplified approach to estimating the distribution of occasionally-consumed dietary components, applied to alcohol intake. BMC Medical Research Methodology, 78-88, vol. 16(78). doi> link> full text>
  • Solis-Trapala I, Schoenmakers I, Goldberg GR, Prentice A, Ward KA. 2015. Sequences of Regressions Distinguish Nonmechanical from Mechanical Associations between Metabolic Factors, Body Composition, and Bone in Healthy Postmenopausal Women. J Nutr, 846-854, vol. 146(4). link> doi> full text>
  • Jenkins V, Solis-Trapala I, Langridge C, Catt S, Talbot DC, Fallowfield LJ. 2011. What oncologists believe they said and what patients believe they heard: an analysis of phase I trial discussions. J Clin Oncol, 61-68, vol. 29(1). link> doi>

Full Publications Listshow

Journal Articles

  • Boyer A, Solis-Trapala I, Tabinor M, Davies SJ, Lambie M. 2020. Impact of the implementation of an assisted peritoneal dialysis service on peritoneal dialysis initiation. Nephrol Dial Transplant, 1595-1601, vol. 35(9). link> doi> full text>
  • Fallowfield L, Solis-Trapala I, Starkings R, Catt S, May S, Jenkins V. 2019. Talking about risk in the context of genomic tests (TARGET): development and evaluation of an educational program for clinicians. Breast Cancer Res Treat, 641-649, vol. 177(3). link> doi> full text>
  • Lambie M, Teece L, Johnson DW, Petrie M, Mactier R, Solis-Trapala I, Belcher J, Bekker HL, Wilkie M, Tupling K, Phillips-Darby L, Davies SJ. 2019. Estimating risk of encapsulating peritoneal sclerosis accounting for the competing risk of death. Nephrol Dial Transplant, 1585-1591, vol. 34(9). link> doi> full text>
  • Jenkins V, Solis-Trapala I, Payne H, Mason M, Fallowfield L, May S, Matthews L, Catt S. 2019. Treatment Experiences, Information Needs, Pain and Quality of Life in Men with Metastatic Castrate-resistant Prostate Cancer: Results from the EXTREQOL Study. CLINICAL ONCOLOGY, 99-107, vol. 31(2). link> doi> full text>
  • Jenkins V, Solis-Trapala I, Payne H, Mason M, Fallowfield L, May S, Matthews L, Catt S. 2019. Treatment Experiences, Information Needs, Pain and Quality of Life in Men with Metastatic Castrate-resistant Prostate Cancer: Results from the EXTREQOL Study. Clin Oncol (R Coll Radiol), 99-107, vol. 31(2). link> doi> full text>
  • Duff CJ, Solis-Trapala I, Driskell OJ, Holland D, Wright H, Waldron JL, Ford C, Scargill JJ, Tran M, Hanna FWF, Pemberton RJ, Heald A, Fryer AA. 2018. The frequency of testing for glycated haemoglobin, HbA1c, is linked to the probability of achieving target levels in patients with suboptimally controlled diabetes mellitus. Clin Chem Lab Med, 296-304, vol. 57(2). link> doi> full text>
  • Ambrosini GL, Solis-Trapala I, Ahern AL, Fuller NR, Holzapfel C, Hauner H, Caterson ID, Jebb SA. 2018. Greater improvements in diet quality among overweight participants following a group-based commercial weight loss programme than those receiving support to lose weight in primary care. Nutr J, 64, vol. 17(1). link> doi> full text>
  • Briggs V, Solis-Trapala I, Wailloo A, McCulloch K, Lambie M, Caskey F, Fotheringham J, Davies S, Wilkie M. 2018. United Kingdom Catheter Study - Protocol Synopsis (vol 38, pg 113, 2018). PERITONEAL DIALYSIS INTERNATIONAL, 314, vol. 38(4). link> doi>
  • Lawson CA, Solis-Trapala I, Dahlstrom U, Mamas M, Jaarsma T, Kadam UT, Stromberg A. 2018. Comorbidity health pathways in heart failure patients: A sequences-of-regressions analysis using cross-sectional data from 10,575 patients in the Swedish Heart Failure Registry. PLoS Med, e1002540, vol. 15(3). link> doi> full text>
  • Briggs V, Solis-Trapala I, Wailloo A, McCulloch K, Lambie M, Caskey F, Fotheringham J, Davies S, Wilkie M. 2018. United Kingdom Catheter Study - Protocol Synopsis. Perit Dial Int, 113-118, vol. 38(2). link> doi>
  • Briggs V, Solis-Trapala I, Wailoo A, McCullough K, Lambie M, Caskey FJ, Fotheringham J, Davies SJ, Wilkie M. 2017. UNITED KINGDOM CATHETER STUDY - PROTOCOL SYNOPSIS. Perit Dial Int. link> doi>
  • Davies SJ, Caskey FJ, Coyle D, Lindley E, Macdonald J, Mitra S, Wilkie M, Davenport A, Farrington K, Dasgupta I, Ormandy P, Andronis L, Solis-Trapala I, Sim J. 2017. Rationale and design of BISTRO: a randomized controlled trial to determine whether bioimpedance spectroscopy-guided fluid management maintains residual kidney function in incident haemodialysis patients. BMC Nephrol, 138, vol. 18(1). link> doi> full text>
  • Fallowfield L, Solis-Trapala I, Menon U, Langridge C, May S, Jacobs I, Jenkins V. 2017. The effect of ovarian cancer screening on sexual activity and functioning: results from the UK collaborative trial of ovarian cancer screening RCT. Br J Cancer, 1111-1117, vol. 116(8). link> doi> full text>
  • Almiron-Roig E, Domínguez A, Vaughan D, Solis-Trapala I, Jebb SA. 2016. Acceptability and potential effectiveness of commercial portion control tools amongst people with obesity. Br J Nutr, 1974-1983, vol. 116(11). link> doi> full text>
  • Chernova J and Solis-Trapala I. 2016. A simplified approach to estimating the distribution of occasionally-consumed dietary components, applied to alcohol intake. BMC Medical Research Methodology, 78-88, vol. 16(78). doi> link> full text>
  • Solis-Trapala I, Schoenmakers I, Goldberg GR, Prentice A, Ward KA. 2015. Sequences of Regressions Distinguish Nonmechanical from Mechanical Associations between Metabolic Factors, Body Composition, and Bone in Healthy Postmenopausal Women. J Nutr, 846-854, vol. 146(4). link> doi> full text>
  • Walker CG, Solis-Trapala I, Holzapfel C, Ambrosini GL, Fuller NR, Loos RJF, Hauner H, Caterson ID, Jebb SA. 2015. Modelling the Interplay between Lifestyle Factors and Genetic Predisposition on Markers of Type 2 Diabetes Mellitus Risk. PLoS One, e0131681, vol. 10(7). link> doi> full text>
  • Lewis HB, Ahern AL, Solis-Trapala I, Walker CG, Reimann F, Gribble FM, Jebb SA. 2015. Effect of reducing portion size at a compulsory meal on later energy intake, gut hormones, and appetite in overweight adults. Obesity, 1362-1370, vol. 23(7). link> doi> link> full text>
  • Riddell A, Crabtree N, Ross-Russell R, Solis-Trapala I, Prentice A, Ward K. Characterising the muscle-bone unit in children and adolescents with and without cystic fibrosis using novel imaging techniques and jumping mechanography. Bone Abstracts. doi>
  • Riddell A, Solis-Trapala I, Prentice A, Ward K. Muscle power and force are predictors of bone microarchitecture and strength in healthy children and adolescents measured by high resolution peripheral quantitative computed tomography and jumping mechanography. Bone Abstracts. doi>
  • Sioen I, Solis-Trapala I, De SJ, Roggen I, Goemaere S, De HS, Ward K. The role of body composition in the relationship between lifestyle factors and bone parameters of young children. Bone Abstracts. doi>
  • Harder H, Langridge C, Solis-Trapala I, Zammit C, Grant M, Rees D, Burkinshaw L, Jenkins V. 2015. Post-operative exercises after breast cancer surgery: Results of a RCT evaluating standard care versus standard care plus additional yoga exercise. EUROPEAN JOURNAL OF INTEGRATIVE MEDICINE, 202-210, vol. 7(3). link> doi> full text>
  • Almiron-Roig E, Tsiountsioura M, Lewis HB, Wu J, Solis-Trapala I, Jebb SA. 2015. Large portion sizes increase bite size and eating rate in overweight women. Physiol Behav, 297-302, vol. 139. link> doi>
  • Almiron-Roig E, Solis-Trapala I, Dodd J, Jebb SA. 2013. Estimating food portions. Influence of unit number, meal type and energy density. Appetite, 95-103, vol. 71. link> doi>
  • Fallowfield L, Solis-Trapala I, Jones A, Barrett J, Langridge C, Jenkins V. 2011. Discussing expensive Anti-cancer drugs. British Journal of Health Care Management, 206-212, vol. 17. link> doi>
  • Jenkins V, Catt S, Banerjee S, Gourley C, Montes A, Solis-Trapala I, Monson K, Fallowfield L. 2013. Patients' and oncologists' views on the treatment and care of advanced ovarian cancer in the U.K.: results from the ADVOCATE study. Br J Cancer, 2264-2271, vol. 108(11). link> doi> full text>
  • Simcock R, Fallowfield L, Monson K, Solis-Trapala I, Parlour L, Langridge C, Jenkins V, ARIX Steering Committee. 2013. ARIX: a randomised trial of acupuncture v oral care sessions in patients with chronic xerostomia following treatment of head and neck cancer. Ann Oncol, 776-783, vol. 24(3). link> doi>
  • Lobban F, Solis-Trapala I, Tyler E, Chandler C, Morriss RK, Grp ERP. 2013. The Role of Beliefs About Mood Swings in Determining Outcome in Bipolar Disorder. COGNITIVE THERAPY AND RESEARCH, 51-60, vol. 37(1). link> doi>
  • Fallowfield LJ, Solis-Trapala I, Jenkins VA. 2012. Evaluation of an educational program to improve communication with patients about early-phase trial participation. Oncologist, 377-383, vol. 17(3). link> doi>
  • Todd NJ, Solis-Trapala I, Jones SH, Lobban FA. 2012. An online randomised controlled trial to assess the feasibility, acceptability and potential effectiveness of 'Living with Bipolar': a web-based self-management intervention for bipolar disorder: trial design and protocol. Contemp Clin Trials, 679-688, vol. 33(4). link> doi>
  • Jenkins VA, Trapala IS, Parlour L, Langridge CI, Fallowfield LJ. 2011. The views of patients and the general public about expensive anti-cancer drugs in the NHS: a questionnaire-based study. JRSM Short Rep, 69, vol. 2(9). link> doi> full text>
  • Lobban F, Solis-Trapala I, Symes W, Morriss R, ERP Group, University of Liverpool. 2011. Early warning signs checklists for relapse in bipolar depression and mania: utility, reliability and validity. J Affect Disord, 413-422, vol. 133(3). link> doi>
  • Jenkins V, Solis-Trapala I, Langridge C, Catt S, Talbot DC, Fallowfield LJ. 2011. What oncologists believe they said and what patients believe they heard: an analysis of phase I trial discussions. J Clin Oncol, 61-68, vol. 29(1). link> doi>
  • Crawford TJ, Parker E, Solis-Trapala I, Mayes J. 2011. Is the relationship of prosaccade reaction times and antisaccade errors mediated by working memory?. Exp Brain Res, 385-397, vol. 208(3). link> doi>
  • Bartolucci F and Solis-Trapala IL. 2010. Multidimensional Latent Markov Models in a Developmental Study of Inhibitory Control and Attentional Flexibility in Early Childhood. PSYCHOMETRIKA, 725-743, vol. 75(4). link> doi>
  • Solis-Trapala IL, Carthey J, Farewell VT, de Leval MR. 2007. Dynamic modelling in a study of surgical error management. Stat Med, 5189-5202, vol. 26(28). link> doi>
  • Hogan JW, Carpenter J, van Houwelingen HC, Sousa I, Didelez V, Cox DR, Aalen OO, Commenges D, Lawless RCJ, Hand DJ, Lin H, Lunn M, Martinussen T, Molenberghs G, Verbeke G, Pipper CB, Scheike TH, Scheike TH, Pipper CB, Solis-Trapala IL, Taylor JMG, Zeng D, Lin DY. 2007. Discussion on the paper by Diggle, Farewell and Henderson. JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS, 530-550, vol. 56. link>
  • Shilling V, Jenkins V, Trapala IS. 2006. The (mis)classification of chemo-fog--methodological inconsistencies in the investigation of cognitive impairment after chemotherapy. Breast Cancer Res Treat, 125-129, vol. 95(2). link> doi>
  • Solis-Trapala IL and Farewell VT. 2005. Regression analysis of overdispersed correlated count data with subject specific covariates. Stat Med, 2557-2575, vol. 24(16). link> doi>
  • Jenkins V, Fallowfield L, Solis-Trapala I, Langridge C, Farewell V. 2005. Discussing randomised clinical trials of cancer therapy: evaluation of a Cancer Research LTK training programme. BMJ-BRITISH MEDICAL JOURNAL, 400-403, vol. 330(7488). link> doi>
  • Jenkins V, Fallowfield L, Solis-Trapala I, Langridge C, Farewell V. 2005. Discussing randomised clinical trials of cancer therapy: evaluation of a Cancer Research UK training programme. BMJ, 400, vol. 330(7488). link> doi>
  • Solís-Trápala IL and Farewell VT. 2006. A note on robust inference from a conditional Poisson model. Biom J, 117-130, vol. 48(1). link> doi>
  • Jenkins VA, Fallowfield LJ, Langridge CI, Farewell V, Solis-Trapala I. 2004. Efficacy of an intervention to improve communication about randomised clinical trials (RCTS) in cancer. Journal of Clinical Oncology, 6040, vol. 22(14_suppl). doi>
  • Jenkins VA, Fallowfield LJ, Langridge CI, Farewell V, Solis-Trapala I. 2004. Efficacy of an intervention to improve communication about randomised clinical trials (RCTS) in cancer. JOURNAL OF CLINICAL ONCOLOGY, 529S, vol. 22(14). link>
  • Fallowfield L, Jenkins V, Farewell V, Solis-Trapala I, Catt S. 2003. Enduring impact of communication skills training for oncologists: 12 month follow-up results of a randomised trial. PSYCHO-ONCOLOGY, 835-836, vol. 12(8). link>
  • Fallowfield L, Jenkins V, Farewell V, Solis-Trapala I. 2003. Enduring impact of communication skills training: results of a 12-month follow-up. Br J Cancer, 1445-1449, vol. 89(8). link> doi> full text>

Other

  • Cheung C, Kasraie J, Solis-Trapala I, Sizer A. 2020. Comparison of perinatal outcomes between day 5 and 6 blastocyst transfers in both fresh and frozen cycles. HUMAN REPRODUCTION (pp. 1482-1483, vol. 35). link>
  • Almiron-Roig E, Dominguez A, Vaughan D, Solis-Trapala I, Jebb SA. 2016. Acceptability, ease of use and perceived effectiveness of two portion control tools by people who are obese. PROCEEDINGS OF THE NUTRITION SOCIETY (p. E125, vol. 75). link> doi>
  • Solis-Trapala I. 2014. Multinbmod: Regression analysis of overdispersed correlated count data. link>
  • Fallowfield L, Solis-Trapala I, Langridge CI, Jenkins VA. 2011. Evaluation of an intervention to improve communication about phase I/II trials. JOURNAL OF CLINICAL ONCOLOGY (vol. 29). link> doi>