• PhD Public Health (Cum Laude), University of Granada, Spain, 2012-2017
  • MPH, University of Granada and University of Copenhagen, 2010-2012
  • GradDip Arts (Spanish), Massey University, New Zealand, 2005-2009
  • MBChB, University of Otago, New Zealand, 2001-2006

Other Certifications and courses:

see Continuing Education and Professional Development here


  • Freelance Medical Writer, 2015-
  • Freelance Medical Translator, 2015-
  • External researcher and consultant, Andalusian School of Public Health, 2017
  • Intern Health Care Quality, WHO EURO, 2012
  • Locum Medical Doctor, Wellington Region, NZ, 2006-2010
  • Honorary Senior Clinical Lecturer, Wellington School of Medicine, University of Otago, 2009-2010
  • Surgical Registrar, Wellington Hospital, NZ, 2008-2010
  • Junior Doctor, Wellington Hospital, NZ, 2006-2010
  • Summer Research Studentship, Wellington School of Medicine, University of Otago, 2003-2004

Professional Memberships

  • European Medical Writers Association
  • American Medical Writers Association
  • Asociación Española de Redactores de Textos Médicos
  • Tremédica
  • Medical College of Malaga, Spain
  • New Zealand Medical Association

Publications and Poster Presentations


  • Sánchez-Cruz JJ, De Ruiter I, Jiménez-Moleón JJ, García L, Sánchez MJ. Stabilization and reversal of child obesity in Andalusia using objective anthropometric measures by socioeconomic status. BMC Pediatr. 2018;18(1):322. doi:10.1186/s12887-018-1295-4
  • De Ruiter I, Olmedo-Requena R, Jiménez-Moleón JJ. Parental and Child Factors Associated with Under-Estimation of Children with Excess Weight in Spain. Matern Child Health J. 2017
  • De Ruiter I, Olmedo-Requena R, Sánchez-Cruz J-J, Jiménez-Moleón J-J. Trends in Child Obesity and Underweight in Spain by Birth Year and Age, 1983 to 2011. Rev Esp Cardiol. 2017
  • De Ruiter I, Olmedo-Requena R, Sánchez-Cruz JJ, Jiménez-Moleón JJ, Changes in sleep duration in Spanish children aged 2–14 years from 1987 to 2011, Sleep Medicine.2016
  • Johnson W, De Ruiter I, Ohm Kyvik K, Murray A, Sørensen T.I.A,  Genetic and Environmental Transactions Underlying the Association between Physical Fitness/Physical Exercise and Body Composition, Behav  Genet. 2015, 45 (1):84-105
  • Sánchez-Cruz J, De Ruiter I, Jiménez-Moleón J, Individual, family and environmental factors associated with pediatric excess weight in Spain: a cross-sectional study. BMC Pediatrics. 2014; 14(1):3
  • Yang J, De Ruiter I, Parker A, Wormald PJ, Robinson S, Wickremesekera A, Endoscopic endonasal transsphenoidal surgery: a mentoring surgical model. ANZ Journal of Surgery. 2012; 82: 452–456
  • Kljakovic M, Abernathy D, De Ruiter I, Quality of diagnostic coding and information flow from hospital to general practice, Inform Prim Care. 2004; 12(4): 227-234

 Poster Presentations

  • De Ruiter I, Genetic contribution to physical activity and fitness and its modification effect on genetic variation in obesity traits. Presented at Poster Session for Master Thesis, EHESP Rennes 2012
  • De Ruiter I, Selvaratnam V, Robinson R, A mobile stent removal reminder system, BJUI, 2010, 150(Suppl) Poster presentation at ANZUS Annual Scientific Meeting, Perth, Australia; February 2010