Method Papers – Jonas Ranstam

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Turkiewicz A, Cook JA, Ranstam J. Propensity scores. British Journal of Surgery. 2022 Sep;109(9):891–2.

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Ranstam J, Cook JA. Quantiles. British Journal of Surgery. 2022 Aug;109(8):783.

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Ranstam J, Cook JA. Immortal time bias. British Journal of Surgery. 2022 Jul;109(7):642.

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Cook JA, Bi D, Ranstam J. The art of reporting numerical data. British Journal of Surgery. 2022 Jun;109(6):548 & ndash;549.

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Ranstam J, Cook JA. Number needed to treat. British Journal of Surgery. 2022 Jun;109(6):547.

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Ranstam J, Wagner P. Systematic reviews, meta-analyses, randomized trials, and observational studies. Acta orthopaedica. 2022 Jan;93:1–2.

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Ranstam J. “There was no difference (p = 0.079)”. Acta orthopaedica. 2021 Aug;92(4):371–2.

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Ranstam J. Hypothesis-generating and confirmatory studies, Bonferroni correction, and pre-specification of trial endpoints. Acta orthopaedica. 2019 Aug;90(4):1–2.

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Ranstam J. Time to restrict the use of p-values in Acta Orthopaedica. Acta orthopaedica. 2019 Feb;90(1):1–2.

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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 Nov;26(11):1409–11.

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Ranstam J, Cook JA. LASSO regression. The British journal of surgery. 2018 Sep;105(10).

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Ranstam J. Are competing risks models appropriate to describe implant failure? Acta orthopaedica. 2018 Jun;89(3).

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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 orthopaedica. 2017 Dec;88(6):578–80.

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Ranstam J, Cook JA. Non-inferiority and equivalence trials. The British journal of surgery. 2017 Oct;104(11):1578–9.

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Cook JA, Ranstam J. Statistical models and confounding adjustment. The British journal of surgery. 2017 May;104(6):786–7.

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Ranstam J, Cook JA. Kaplan-Meier curve. The British journal of surgery. 2017 Mar;104(4).

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Ranstam J, Cook JA. Considerations for the design, analysis and presentation of in-vivo studies. Osteoarthritis and cartilage. 2017 Mar;25(3):364–8.

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Cook JA, Ranstam J. Spurious findings. The British journal of surgery. 2017 Jan;104(1).

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Ranstam J, Cook JA, Collins GS. Clinical prediction models. The British journal of surgery. 2016 Dec;103(13).

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Cook JA, Ranstam J. Overfitting. The British journal of surgery. 2016 Dec;103(13).

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Ranstam J, Cook JA. Causal relationship and confounding in statistical models. The British journal of surgery. 2016 Oct;103(11):1445–6.

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Ranstam J, Cook JA. Statistical models: an overview. The British journal of surgery. 2016 Jul;103(8).

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Ranstam J. Multiple P-values and Bonferroni correction. Osteoarthritis and cartilage. 2016 May;24(5):763–4.

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Ranstam J. The importance of clear language. Acta Orthop [Internet]. 2013 Oct [cited 2024 Jul 27];84(5):443. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3822126/

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Ranstam J. Why the P-value culture is bad and confidence intervals a better alternative. Osteoarthritis Cartilage. 2012 Aug;20(8):805–8.

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Ranstam J. Repeated measurements, bilateral observations and pseudoreplicates, why does it matter? Osteoarthritis and cartilage. 2012 Jun;20(6):473–5.

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Ranstam J, Turkiewicz A, Boonen S, Meirhaeghe JV, Bastian L, Wardlaw D. 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 Med Res Methodol. 2012 Mar;12.

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Ranstam J, Robertsson O, W-Dahl A, Lofvendahl S, Lidgren L. [EQ-5D–a difficult-to-interpret tool for clinical improvement work]. Lakartidningen. 2011 Sep;108(36):1707–8.

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Ranstam J, Karrholm J, Pulkkinen P, Makela K, Espehaug B, Pedersen AB, et al. Statistical analysis of arthroplasty data. I Introduction and background. Acta Orthop. 2011 May;82(3):253–7.

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Ranstam J, Karrholm J, Pulkkinen P, Makela K, Espehaug B, Pedersen AB, et al. Statistical analysis of arthroplasty data. II. Guidelines. Acta Orthop. 2011 May;82(3):258–67.

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Mithoefer K, Saris DBF, Farr J, Kon E, Zaslav K, Cole BJ, et al. Guidelines for the Design and Conduct of Clinical Studies in Knee Articular Cartilage Repair: International Cartilage Repair Society Recommendations Based on Current Scientific Evidence and Standards of Clinical Care. Cartilage. 2011 Apr;2(2):100–21.

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Ranstam J, Wagner P. What information is in an EQ-5D comparison? [Internet]. 2011. Available from: http://www.bmj.com/letters

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Ranstam J, Wagner P. The confusing EQ-5D index. JBJS Br [electronic letter] 5 Oct 2011. 2011;

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Ranstam J, L. S. Lohmander. What’s in a number or in a picture? Osteoarthritis and cartilage. 2010 Aug;18(8):1003–5.

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Ranstam J. The top ten statistical mistakes (in Swedish). Ortopediskt Magasin. 2010 Mar;(1):59–61.

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Ranstam J, Robertsson O. Statistical analysis of arthroplasty register data. Acta Orthop. 2010 Feb;81(1):10–4.

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Ranstam J. Reporting laboratory experiments. Osteoarthritis Cartilage. 2010 Jan;18(1):3–4.

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Ranstam J. Sampling uncertainty in medical research. Osteoarthritis Cartilage. 2009 Nov;17(11):1416–9.

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Ranstam J. Data handling, statistical computing, and archiving. Acta Radiol. 2008 Dec;49(10):1137–9.

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Ranstam J, Wagner P, Robertsson O, Lidgren L. Health-care quality registers: outcome-orientated ranking of hospitals is unreliable. J Bone Joint Surg Br. 2008 Dec;90(12):1558–61.

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Ranstam J. Analyzing a randomized trial. Acta Radiol. 2008 Nov;49(9):1005–6.

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Ranstam J. Planning a randomized trial. Acta Radiol. 2008 Oct;49(8):893–4.

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Ranstam J. Adjusting results for confounding bias. Acta Radiol. 2008 Sep;49(7):769–70.

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Ranstam J, Wagner P, Robertsson O, Lidgren L. Ranking in health care results in wrong conclusions. Lakartidningen. 2008 Aug;105(35):2313–4.

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Ranstam J. Bias in observational studies. Acta Radiol. 2008 Jul;49(6):644–5.

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Ranstam J. Negative results. Acta Radiol. 2008 Jun;49(5):521–2.

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Ranstam J. Patient number calculations. Acta Radiol. 2008 May;49(4):398–9.

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Ranstam J. Analysis units. Acta Radiol. 2008 Apr;49(3):371–2.

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Ranstam J. Statistical significance. Acta Radiol. 2008 Mar;49(2):220–1.

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Ranstam J. Methodological note: accuracy, precision, and validity. Acta Radiol. 2008 Feb;49(1):105–6.