Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Multiple imputation using chained equations: Issues and guidance for practice
20106.5k citationsPatrick Royston et al.Statistics in Medicineprofile →
Multiple imputation for missing data in epidemiological and clinical research: potential and pitfalls
20095.0k citationsJohn B. Carlin, Patrick Royston et al.BMJprofile →
Analysis of serial measurements in medical research.
19902.7k citationsJ. N. S. Matthews, D G Altman et al.BMJprofile →
20061.7k citationsDouglas G. Altman, Patrick RoystonBMJprofile →
Dichotomizing continuous predictors in multiple regression: a bad idea
20051.6k citationsPatrick Royston, Douglas G. Altman et al.Statistics in Medicineprofile →
What do we mean by validating a prognostic model?
20001.1k citationsDouglas G. Altman, Patrick RoystonStatistics in Medicineprofile →
Flexible parametric proportional‐hazards and proportional‐odds models for censored survival data, with application to prognostic modelling and estimation of treatment effects
20021.1k citationsPatrick Royston, Mahesh ParmarStatistics in Medicineprofile →
Prognosis and prognostic research: validating a prognostic model
20091.1k citationsPatrick Royston et al.BMJprofile →
Prognosis and prognostic research: what, why, and how?
2009935 citationsPatrick Royston, Douglas G. Altman et al.BMJprofile →
The use of fractional polynomials to model continuous risk variables in epidemiology
1999905 citationsPatrick Royston, Gareth Ambler et al.profile →
Multiple Imputation by Chained Equations (MICE): Implementation inStata
Countries citing papers authored by Patrick Royston
Since
Specialization
Citations
This map shows the geographic impact of Patrick Royston's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Patrick Royston with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Patrick Royston more than expected).
This network shows the impact of papers produced by Patrick Royston. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Patrick Royston. The network helps show where Patrick Royston may publish in the future.
Co-authorship network of co-authors of Patrick Royston
This figure shows the co-authorship network connecting the top 25 collaborators of Patrick Royston.
A scholar is included among the top collaborators of Patrick Royston based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Patrick Royston. Patrick Royston is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Royston, Patrick & Mahesh Parmar. (2013). Restricted mean survival time: an alternative to the hazard ratio for the design and analysis of randomized trials with a time-to-event outcome. BMC Medical Research Methodology. 13(1). 152–152.623 indexed citations breakdown →
2.
Royston, Patrick & Douglas G. Altman. (2013). External validation of a Cox prognostic model: principles and methods. BMC Medical Research Methodology. 13(1). 33–33.603 indexed citations breakdown →
Royston, Patrick, John C. Galati, & John B. Carlin. (2007). A new architecture for handling multiply imputed data in Stata. RePEc: Research Papers in Economics.1 indexed citations
9.
Royston, Patrick & Willi Sauerbrei. (2005). Building multivariable regression models with continuous covariates, with a practical emphasis on fractional polynomials and applications in clinical epidemiology.. UCL Discovery (University College London).1 indexed citations
Royston, Patrick, et al.. (2000). Nonlinear regression models involving power or exponential functions of covariates: update. Stata technical bulletin. 9(49).4 indexed citations
12.
Royston, Patrick, et al.. (2000). Multivariable fractional polynomials: update. Stata technical bulletin. 9(49).7 indexed citations
13.
Wright, Eileen & Patrick Royston. (1997). Age-specific reference intervals (“normal ranges”). Stata technical bulletin. 6(34).20 indexed citations
14.
Royston, Patrick & Douglas G. Altman. (1995). Using fractional polynomials to model curved regression relationships. Stata technical bulletin. 4(21).19 indexed citations
15.
Royston, Patrick. (1994). Generalized linear models: revision of glm. Stata technical bulletin. 3(18).1 indexed citations
Matthews, J. N. S., D G Altman, Michael J. Campbell, & Patrick Royston. (1990). Analysis of serial measurements in medical research.. BMJ. 300(6719). 230–235.2738 indexed citations breakdown →
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.