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Results: 1 to 20 of 151

1.

An approach to trial design and analysis in the era of non-proportional hazards of the treatment effect.

Royston P, Parmar MK.

Trials. 2014 Aug 7;15(1):314. doi: 10.1186/1745-6215-15-314.

PMID:
25098243
[PubMed - in process]
Free PMC Article
2.

Correcting for optimistic prediction in small data sets.

Smith GC, Seaman SR, Wood AM, Royston P, White IR.

Am J Epidemiol. 2014 Aug 1;180(3):318-24. doi: 10.1093/aje/kwu140. Epub 2014 Jun 24.

PMID:
24966219
[PubMed - indexed for MEDLINE]
Free PMC Article
3.

Tuning multiple imputation by predictive mean matching and local residual draws.

Morris TP, White IR, Royston P.

BMC Med Res Methodol. 2014 Jun 5;14:75. doi: 10.1186/1471-2288-14-75.

PMID:
24903709
[PubMed - in process]
Free PMC Article
4.

Investigation of continuous effect modifiers in a meta-analysis on higher versus lower PEEP in patients requiring mechanical ventilation--protocol of the ICEM study.

Kasenda B, Sauerbrei W, Royston P, Briel M.

Syst Rev. 2014 May 20;3:46. doi: 10.1186/2046-4053-3-46.

PMID:
24887172
[PubMed - in process]
Free PMC Article
5.

Reference intervals of spinal mobility measures in normal individuals: the mobility study.

Ramiro S, van Tubergen A, Stolwijk C, van der Heijde D, Royston P, Landewé R.

Ann Rheum Dis. 2014 Mar 24. doi: 10.1136/annrheumdis-2013-204953. [Epub ahead of print]

PMID:
24665113
[PubMed - as supplied by publisher]
6.

Restricted mean survival time: an alternative to the hazard ratio for the design and analysis of randomized trials with a time-to-event outcome.

Royston P, Parmar MK.

BMC Med Res Methodol. 2013 Dec 7;13:152. doi: 10.1186/1471-2288-13-152.

PMID:
24314264
[PubMed - in process]
Free PMC Article
7.

Multiple imputation for an incomplete covariate that is a ratio.

Morris TP, White IR, Royston P, Seaman SR, Wood AM.

Stat Med. 2014 Jan 15;33(1):88-104. doi: 10.1002/sim.5935. Epub 2013 Aug 6.

PMID:
23922236
[PubMed - indexed for MEDLINE]
Free PMC Article
8.

Exaggeration of the prognostic effect of Mammostrat: a consequence of poor reporting?

Sauerbrei W, Royston P.

J Clin Oncol. 2013 Jul 20;31(21):2760-1. doi: 10.1200/JCO.2013.49.2652. Epub 2013 Jun 17. No abstract available.

PMID:
23775953
[PubMed - indexed for MEDLINE]
Free Article
9.

Interaction of treatment with a continuous variable: simulation study of significance level for several methods of analysis.

Royston P, Sauerbrei W.

Stat Med. 2013 Sep 30;32(22):3788-803. doi: 10.1002/sim.5813. Epub 2013 Apr 12.

PMID:
23580422
[PubMed - indexed for MEDLINE]
10.

External validation of a Cox prognostic model: principles and methods.

Royston P, Altman DG.

BMC Med Res Methodol. 2013 Mar 6;13:33. doi: 10.1186/1471-2288-13-33.

PMID:
23496923
[PubMed - indexed for MEDLINE]
Free PMC Article
11.

Impact of lack-of-benefit stopping rules on treatment effect estimates of two-arm multi-stage (TAMS) trials with time to event outcome.

Choodari-Oskooei B, Parmar MK, Royston P, Bowden J.

Trials. 2013 Jan 23;14:23. doi: 10.1186/1745-6215-14-23.

PMID:
23343147
[PubMed - indexed for MEDLINE]
Free PMC Article
12.

Comparison between splines and fractional polynomials for multivariable model building with continuous covariates: a simulation study with continuous response.

Binder H, Sauerbrei W, Royston P.

Stat Med. 2013 Jun 15;32(13):2262-77. doi: 10.1002/sim.5639. Epub 2012 Oct 3.

PMID:
23034770
[PubMed - indexed for MEDLINE]
13.

Medical student characteristics predictive of intent for rural practice.

Royston PJ, Mathieson K, Leafman J, Ojan-Sheehan O.

Rural Remote Health. 2012;12:2107. Epub 2012 Aug 9.

PMID:
22873948
[PubMed - indexed for MEDLINE]
Free Article
14.

Analysing covariates with spike at zero: a modified FP procedure and conceptual issues.

Becher H, Lorenz E, Royston P, Sauerbrei W.

Biom J. 2012 Sep;54(5):686-700. doi: 10.1002/bimj.201100263. Epub 2012 Jul 9.

PMID:
22778015
[PubMed - indexed for MEDLINE]
15.

A simulation study of predictive ability measures in a survival model II: explained randomness and predictive accuracy.

Choodari-Oskooei B, Royston P, Parmar MK.

Stat Med. 2012 Oct 15;31(23):2644-59. doi: 10.1002/sim.5460. Epub 2012 Jul 5.

PMID:
22764064
[PubMed - indexed for MEDLINE]
16.

Risk prediction models: II. External validation, model updating, and impact assessment.

Moons KG, Kengne AP, Grobbee DE, Royston P, Vergouwe Y, Altman DG, Woodward M.

Heart. 2012 May;98(9):691-8. doi: 10.1136/heartjnl-2011-301247. Epub 2012 Mar 7. Review.

PMID:
22397946
[PubMed - indexed for MEDLINE]
17.

Risk prediction models: I. Development, internal validation, and assessing the incremental value of a new (bio)marker.

Moons KG, Kengne AP, Woodward M, Royston P, Vergouwe Y, Altman DG, Grobbee DE.

Heart. 2012 May;98(9):683-90. doi: 10.1136/heartjnl-2011-301246. Epub 2012 Mar 7. Review.

PMID:
22397945
[PubMed - indexed for MEDLINE]
18.

A new strategy for meta-analysis of continuous covariates in observational studies.

Sauerbrei W, Royston P.

Stat Med. 2011 Dec 10;30(28):3341-60. doi: 10.1002/sim.4333. Epub 2011 Sep 22.

PMID:
21953493
[PubMed - indexed for MEDLINE]
19.

Prognostic model for survival in patients with metastatic renal cell carcinoma: results from the international kidney cancer working group.

Manola J, Royston P, Elson P, McCormack JB, Mazumdar M, Négrier S, Escudier B, Eisen T, Dutcher J, Atkins M, Heng DY, Choueiri TK, Motzer R, Bukowski R; International Kidney Cancer Working Group.

Clin Cancer Res. 2011 Aug 15;17(16):5443-50. doi: 10.1158/1078-0432.CCR-11-0553. Epub 2011 Aug 9.

PMID:
21828239
[PubMed - indexed for MEDLINE]
Free PMC Article
20.

The use of restricted mean survival time to estimate the treatment effect in randomized clinical trials when the proportional hazards assumption is in doubt.

Royston P, Parmar MK.

Stat Med. 2011 Aug 30;30(19):2409-21. doi: 10.1002/sim.4274. Epub 2011 May 25.

PMID:
21611958
[PubMed - indexed for MEDLINE]

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