Some papers, program manuals, presentations, and other documents by Roger Newson

These documents can be viewed using the Adobe Acrobat Reader, which can be downloaded free from the Adobe Acrobat Reader website.

To find more about Stata statistical software (referred to extensively in these documents), click here. You may also want to find out more about The Stata Journal, where some of these papers were published. The Stata Journal also contains a lot of other very useful papers by a lot of other authors, which are not available here.

Stata User Meeting presentations by Roger Newson can be downloaded from their own separate page here.

The Stata Journal
Stata User Meeting presentations by Roger Newson
Papers by Roger Newson in journals
Program manuals by Roger Newson
Miscellaneous documents by Roger Newson
Return to Roger Newson's main resource page



Papers in journals

These were all published in refereed journals. However, some were not indexed anywhere at the time of publication, and may be difficult to find elsewhere.

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Newson RB. Attributable and unattributable risks and fractions and other scenario comparisons. The Stata Journal 2013; 13(4): 672–698. Download pre-publication draft

Newson RB. Bonferroni and Holm approximations for Sidak and Holland–Copenhaver q–values. The Stata Journal 2013; 13(2): 379-381. Download pre-publication draft

Newson RB. Sensible parameters for univariate and multivariate splines. The Stata Journal 2012; 12(3): 479-504. Download pre-publication draft

Newson RB. From resultssets to resultstables in Stata. The Stata Journal 2012; 12(2): 191–213. Download pre-publication draft

Newson RB. Frequentist q-values for multiple-test procedures. The Stata Journal 2010; 10(4): 568-584. Download pre-publication draft

Newson RB. Comparing the predictive power of survival models using Harrell’s c or Somers’ D. The Stata Journal 2010; 10(3): 339–358. Download pre-publication draft

Newson R. Confidence intervals for rank statistics: Percentile slopes, differences, and ratios. The Stata Journal 2006; 6(4): 497-520. Download pre-publication draft

Newson R. Confidence intervals for rank statistics: Somers' D and extensions. The Stata Journal 2006; 6(3): 309-334. Download pre-publication draft

Newson R. Efficient calculation of jackknife confidence intervals for rank statistics. Journal of Statistical Software 2006; 15(1): 1-10. Download

Newson R. Stata tip 13: generate and replace use the current sort order. The Stata Journal 2004; 4(4): 484-485. Download pre-publication draft

Newson R. Generalized power calculations for generalized linear models and more. The Stata Journal 2004; 4(4): 379-401. Download pre-publication draft

Newson R. Stata tip 5: Ensuring programs preserve dataset sort order. The Stata Journal 2004; 4(1): 94. Download post-publication update

Newson R. Stata tip 1: The eform() option of regress. The Stata Journal 2003; 3(4): 445. Download post-publication update

Newson R. Confidence intervals and p-values for delivery to the end user. The Stata Journal 2003; 3(3): 245-269. Download pre-publication draft

Newson R and the ALSPAC Study Team. Multiple-test procedures and smile plots. The Stata Journal 2003; 3(2): 109-132. Download pre-publication draft

Newson R. Parameters behind "nonparametric" statistics: Kendall's tau, Somers' D and median differences. The Stata Journal 2002; 2(1): 45-64. Download pre-publication draft

Newson R. rglm - Robust variance estimates for generalized linear models. Stata Technical Bulletin 1999; 50: 27-33. Reprinted in Stata Technical Bulletin Reprints 2000; 9: 181-190. Download pre-publication draft



Program manuals

These are manuals for programs and packages distributed on the SSC archive site. They contain up-to-date versions of the methods and formulas used by these programs and packages. Stata users can download them from the SSC archive site as ancillary files, using the ssc command in Stata. The copies here are intended for reference by people who may want to know the methods and formulas, and who do not necessarily have immediate access to Stata. The methods and formulas are in the public domain, as are the programs and packages, although Stata itself is proprietary.

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Newson R. Confidence intervals for rank order statistics and their differences. (This is a manual for the program somersd in the somersd package, downloadable from the SSC archive site, and is a post-publication update of a Stata Technical Bulletin article.) Download

Newson R. Robust confidence intervals for median (and other percentile) slopes. (This is a manual for the program censlope in the somersd package, downloadable from the SSC archive site). Download

Newson R. Robust confidence intervals for median (and other percentile) differences between two groups. (This is a manual for the program cendif in the somersd package, downloadable from the SSC archive site, and is a post-publication update of a Stata Technical Bulletin article.) Download

Newson R. Generalized power calculations. (This is a manual for the powercal package, downloadable from the SSC archive site.) Download

Newson RB. B-splines and splines parameterized by their values at reference points. (This is a manual for the bspline package, downloadable from the SSC archive site, and is a post-publication update of a Stata Technical Bulletin article.) Download



Stata User Meeting presentations

Stata User Meeting presentations by Roger Newson can now be downloaded from their own separate page here.

Stata User Meeting presentations by Roger Newson
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Miscellaneous documents

These have not been published, or submitted for publication, in refereed journals. However, they were written in response to queries and/or to justify methods, especially methods not commonly explained elsewhere.

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Estimating and pooling Hedges' g in a meta-analysis. (Having done a meta-analysis of Hedges' g parameters on a messy set of journal articles, the author would like to share some of the formulas used with other meta-analysts for future reference.) Download

Asymptotic standard errors for the logs of variance-inflated Poisson-variance means and of their ratios. (The formulas here are not really original. However, a few lines of algebra are required to derive them from first principles.) Download

Scenario comparisons: How much good can we do? First presented to the Imperial College Primary Care and Public Health Biostatistics Group on 10 December 2014. This is an update to a presentation at the 2012 UK Stata User Meeting, revised to describe the SSC package scenttest, which was added to the punaf suite of packages in 2014. Download

Population unattributable fractions and other scenario comparisons. (A demonstration of population unattributable and attributable fractions and population attributable risks using Stata.) First presented to an Asthma Club meeting at Imperial College, London on 11 November, 2010. This presentation uses data provided by the ALSPAC Study Team at the Institute of Child Health at Bristol University, UK. Download

Asymptotic distributions of two-sample rank statistics for continuous outcomes. (Somers' D, Harrell's c, Hodges-Lehmann percentile differences, and differences between percentiles.) Download

Interpretation of Somers' D under four simple models. (How to interpret the rank association parameter Somers' D in terms of other parameters, assuming specific models for the joint distribution of two variables X and Y.) Download

Causality, confounders, and propensity scores. (A discussion of confounder adjustment in observational studies in epidemiology.) First presented to an Asthma Club meeting at Imperial College, London on 11 December, 2008. This presentation uses data provided by the ALSPAC Study Team at the Institute of Child Health at Bristol University, UK. Download

Hodges-Lehmann median differences between exponential subpopulations. (The median difference is not the difference between the medians.) Download

Asymptotic distributions of linear combinations of logs of multinomial parameter estimates. (Examples include the log odds ratio, and Lindley's alpha parameter for measuring Hardy-Weinberg disequilibrium in genetics.) Download

Identity of Somers' D and the rank biserial correlation coefficient. (This proves that the rank biserial correlation coefficient of Edward Cureton, proportional to the difference between 2 mean ranks, is in fact a special case of Somers' D.) Download

Multiple comparisons: The issues as I see them. This document was presented to the National Heart and Lung Institute Asthma Club on 07 February 2008. It represents my thinking about multiple comparisons before I discovered frequentist q-values, and uses data from the ALSPAC Study Team at the Institute of Child Health at Bristol University, UK. Download

Confidence intervals for scenario means and their differences and ratios. (This summarizes the formulas for estimating differences or ratios between scenario means, using generalized linear models. Examples include the population attributable fraction and the population attributable risk.) Download

Paracetamol, paracetamol propensity and 7 year asthma/wheezing in ALSPAC. (A demonstration of propensity scores in asthma epidemiology.) First presented to an Asthma Club meeting at King's College, London in February, 2003. This presentation was produced collaboratively with my former colleague Seif Shaheen, using data from the ALSPAC Study Team at the Institute of Child Health at Bristol University, UK. Download

Bias caused by missing values in primary predictor variables. (Does smoking kill the drinking classes or vice versa? First presented to a Statistics Group meeting at King's College, London on 29 January, 2002.) Download



Roger B. Newson
Email: r.newson@imperial.ac.uk
Text written: 20 April 2016. (Program manuals may have been revised since then.)
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