This is the official website of SNTL,

the statistical consulting part of Nick Longford's professional activities.

Established: January 2001. Web presence: June 2004.


Email: sntlnick @ SNTL . co . uk

From 7th September 2015, I am at


Imperial College, Division of Medicine
Chelsea and Westminster Hospital Campus
369 Fulham Road, 4th floor
London SW10 9NH, UK


BOOKS:

Statistical Studies of Income, Poverty and Inequality in Europe: Computing and Graphics in R using EU-SILC
(Chapman and Hall/CRC, New York, 2014).

Supporting materials (R code)


Statistical Decision Theory
(Springer-Verlag, New York, 2013).

Supporting materials (R code)


Supporting materials for Studying Human Populations. An Advanced Course in Statistics
(Springer-Verlag, New York, 2008).


SNTL business - areas of expertise:

  • causal inference in observational studies (the potential outcomes framework)

  • decision theory

  • small-area estimation

  • incomplete (missing) data

  • longitudinal analysis

  • statistical modelling (including addressing model uncertainty)

  • statistical computing and graphics in R

  • analysis of very large datasets (including surveys) and data mining

  • analysis of small datasets for which maximum likelihood is inefficient;
    - using prior information and incorporating the consequences of errors

  • design of surveys and other studies

  • clinical trials (beyond hypothesis testing)

  • educational testing and assessment

  • being an expert witness (civil and criminal law)

  • professional training



    Applications in:

  • clinical medicine, epidemiology & biostatistics

  • technical (statistical and data-based related) audit

  • local and central government statistics

  • statistics in civil and criminal law

  • pharmaceutical research and development

  • economics

  • educational testing and assessment

  • marketing

  • high-quality manufacturing and production


  • Business perspective

    Statistics is the business and science of making intelligent decisions
    in the presence of uncertainty and constrained by limited resources


    A photo and motto


    Recent publications

  • Searching for causes of necrotising enterocolitis. An application of propensity matching.
    Statistics in Transition 19, 71-101, 2018.

  • Should the dilated ascending aorta be repaired at the time of bicuspid aortic valve replacement? (with S. C. Body et al.)
    European Journal of Cardio-Thoracic Surgery 53, 560-568, 2018.

  • Rapid testing and treatment for sexually transmitted infections improve patient care
    and yield public health benefits (with G. Whitlock et al.)
    International Journal of STD & AIDS 29, 474-482, 2018.

  • Decision theory for comparing institutions, Statistics in Medicine 37, 437-456, 2018.

  • Causal models for monitoring the progress of infants with low birthweight
    (with O. Ramirez and C. Giffe)
    Revista Brasileira de Biometria (Brazilian Biometric Journal) 35, 600-633, 2017.

  • An index for proximity of two distributions
    Metron 75, 181-194, 2017.

  • A decision-theoretical perspective on bioequivalence.
    Journal of Bioequivalence and Bioavailability 9, 437-438, 2017.


    Presentations

    Statistical methods and applications in neonatal care.
    Computing and graphics in R. Short course (four sessions).
    Universidad Juarez Autonoma de Tabasco, Cunduacan, Tabasco, Mexico; October 2017.

    Comparing the rates of broncho-pulmonary dysplasia on the basis of like with like.
    Paper presented at the Annual NNAP Collaborators Meeting, London, UK; April 2018

    Performance assessment as an application of causal analysis.
    Poster presented at the EuroCIM Meeting, Florence, Italy; April 2018


    Current projects

    Decision theory and utilities for some (all?) statistical problems
    Study design for making decisions

    Hypothesis testing as a bad thing

    The potential outcomes framework for problems with or without causal agenda
    Regression as a second-rate alternative to propensity matching

    Treatment of bronchopulmonary dysplasia (neonatology)

    Therapeutic hypothermia in neonatal care

    Statistical methods for the care for the newborn.
    The relative merits of clinical trials and observational studies in neonatal medicine


    Recent whereabouts

    October 2017 - Universidad Autonoma de Tabasco, Mexico (Conference)

    April 2018 - Workshop on Causal Inference, University of Florence, Italy

    July 2018 - Workshop on Model Selection, Regularization and Inference, Vienna, Austria

    November 2018 - 2nd Colombian Congress on Statistics, Cali, Colombia


    Further back in time (and details)


    July 2018