Jonas Ranstam PhD

Selected publications

  1. Ranstam J. Hypothesis-generating and confirmatory studies, Bonferroni correction, and pre-specification of trial endpoints Acta Orthopaedica 14 May 2019

  2. Ranstam J. Time to restrict the use of p-values. Acta Orthopaedica Published online: 26 Nov 2018

  3. Ranstam J, Cook JA. LASSO regression. Br J Surg 2018;105:10.Sep

  4. Turkiewicz A, Luta G, Hughes HV, Ranstam J. Statistical mistakes and how to avoid them – lessons learned from the reproducibility crisis. Osteoarthritis and cartilage 2018, Aug

  5. Ranstam J, Cook JA. Non-inferiority and equivalence trials. Br J Surg 2017;104:1578-1579

  6. Ranstam J, Robertsson O. The Cox model is better than the Fine and Gray model when estimating relative revision risks from arthroplasty register data. Acta Orthop 2017 03 Aug

  7. Ranstam J, Cook JA. Kaplan-Meier curve. Br J Surg 2017;104:442

  8. Cook JA, Ranstam J. Statistical models and confounding adjustment. Br J Surg 2017;104:786-787

  9. Cook JA, Ranstam J. Spurious findings. Br J Surg 2017;104:97

  10. Cook JA, Ranstam J. Overfitting. Br J Surg 2016;103:1814

  11. Ranstam J, Cook JA. Causal relationship and confounding in statistical models. Br J Surg 2016;103:1445-1446

  12. Cook JA, Ranstam J. Statistical analyses that provide an effect size are to be preferred. Br J Surg 2016;103:1365

  13. Ranstam J, Cook JA. Considerations for the design, analysis and presentation of in vivo studies. Osteoarthritis Cartilage 2016 Jul 30. pii: S1063-4584(16)30191-1

  14. Ranstam J, Cook JA, Collins GS. Clinical prediction models. Br J Surg 2016;103;1886-1886

  15. Ranstam J, Cook JA. Statistical models: an overview. Br J Surg 2016;103:1047

  16. Ranstam J. Multiple p-values and Bonferroni correction. Osteoarthritis Cartilage. 2016 Jan 21
  17. Losina E, Ranstam J, Collins J, Katz JN. Key analytic considerations in design and analysis of randomized controlled trials in osteoarthritis. Osteoarthritis Cartilage 2015;23:674–676

  18. Ranstam J. The importance of clear language. Acta Orthopaedica 2013;84(6)

  19. Ranstam J. Why the p-value culture is bad and confidence intervals a better alternative. Osteoarthritis and Cartilage 2012 April 11

  20. Ranstam J. Repeated measurements, bilateral observations and pseudoreplicates, why does it matter? Osteoarthritis and Cartilage 2012;20:473-475

  21. Ranstam et al. Alternative analyses for handling incomplete follow-up in the intention-to-treat analysis: the randomized controlled trial of balloon kyphoplasty versus non-surgical care for vertebral compression fracture (FREE). BMC Medical Research Methodology 2012,12:35 (24 March 2012)

  22. Ranstam et al. Statistical analysis of arthroplasty data. I. Introduction and background. Acta Orthopaedica 2011;82:253–257

  23. Ranstam et al. Statistical analysis of arthroplasty data. II. Guidelines. Acta Orthopaedica 2011;82:258–267

  24. Ranstam J, Lohmander LS. What’s in a number or in a picture? Osteoarthritis and Cartilage 2010;18:1003-1005

  25. Ranstam J, Robertsson O. Statistical analysis of arthroplasty register data. Acta Orthopaedica 2010;81:10-14

  26. Ranstam J. Sampling uncertainty in medical research. Osteoarthritis and Cartilage 2009;17:1416-1419

  27. Ranstam et al. Health-care quality registers: outcome-orientated ranking of hospitals is unreliable. Journal of Bone and Joint Surgery 2008;Br90:1558-1561

  28. Ranstam J. Accuracy, precision, and validity. Acta Radiologica 2008;49:105-106

  29. Ranstam J. Statistical significance. Acta Radiologica 2008;49:220-221

  30. Ranstam J. Analysis units. Acta Radiologica 2008;49:371-372

  31. Ranstam J. Patient number calculations. Acta Radiologica 2008;49:398-399

  32. Ranstam J. Negative results. Acta Radiologica 2008;49:521-522

  33. Ranstam J. Bias in observational studies. Acta Radiologica 2008;49:644-645

  34. Ranstam J. Adjusting results for confounding bias. Acta Radiologica 2008;49:769-770

  35. Ranstam J. Planning a randomized trial. Acta Radiologica 2008;49:893-894

  36. Ranstam J. Analyzing a randomized trial. Acta Radiologica 2008;49:1005-1006

  37. Ranstam J. Data handling, statistical computing, and archiving. Acta Radiologica 2008;49:1137-1139

  38. Robertsson O, Ranstam J, Lidgren L. Variation in outcome and ranking of hospitals: an analysis from the Swedish knee arthroplasty register. Acta Orthopaedica 2006;77:487-493

  39. Robertsson O, Ranstam J. No bias of ignored bilaterality when analysing the revision risk of knee prostheses: analysis of a population based sample of 44,590 patients with 55,298 knee prostheses from the national Swedish Knee Arthroplasty Register. BMC Musculoskeletal Disorders 2003;4:1 Feb

  40. Ranstam J. P-values in research reports. Acta Orthopaedica 2005;76:290-290

  41. Ranstam J. Problems in orthopedic research: dependent observations. Acta Orthop Scand 2003;73:447-450

  42. Ranstam J. Ryd L, Onsten I. Accurate accuracy assessment: review of basic principles. Acta Orthop Scand 1999;70:319-321

  43. Ranstam J. Repeated measurement and analysis units. Review of basic principles. Acta Orthop Scand 1998;69:345-346

  44. Ranstam J. A common misconception about p-values and its consequences. Acta Orthop Scand 1996;67:505-507

  45. Ranstam J. Statistics and medical research. Basic principles review. Acta Orthop Scand 1995;66:193-195