Keynote Speech
|
Title |
Abstract |
About the
Speaker |
|
Alternatives to Intention to Treat—the MIRA
Trial |
The application
of standard randomized clinical trial methodology to large-scale intervention
trials presents a number of challenges in design, analysis and
interpretation. As motivation, consider The Methods for Improving
Reproductive Health in Africa (MIRA) trial, a recently completed
randomized trial that investigated the effect of diaphragm and lubricant gel
use in reducing HIV infection among susceptible women. 5,045 women were
randomly assigned to either the active treatment arm or not. Additionally,
all subjects in both arms received intensive condom counseling and provision,
the “gold standard” HIV prevention barrier method. There was much lower
reported condom use in the intervention arm than in the control arm,
making it difficult to answer important public health questions based
solely on a standard intention-to-treat analysis. This presentation will
explore these issues and describe an analysis technique adapted from causal
inference to estimate the “direct effects” of assignment to the diaphragm
arm, adjusting for condom use in an appropriate sense. The impact of
measurement error will also be considered and attempts to allow for
non-compliance to the assigned treatment. Questions raised by the MIRA trial
apply to other HIV prevention trials currently being conducted or designed. |
Nicholas P. Jewell is Professor of Biostatistics and
Statistics at the Jewell is a Fellow of the American Statistical
Association, the Jewell worked originally in functional analysis
before turning to Biostatistics. He has made major contributions to
statistical techniques for the analysis of epidemiological data, longitudinal
data analysis, and survival analysis--particularly current status data. In
applications, he has worked on HIV and AIDS data since the beginning of the
epidemic in 1981, and more recently on other infectious diseases, and in
environmental epidemiology and vision science, publishing more than 120
research articles. Jewell has had more than 20 Ph.D. students at |
|
Some statistical issues in the analysis of next
generation sequence data |
One of the most
exciting recent developments in biology has been the advent of sequencing
technology capable of producing many billions of bases of sequence
information in a single run. In this talk I will examine some of the
statistical issues related to the application of this technology to the study
of gene expression and gene regulation. I will review some of the problems
where significant progresses have already been made, such as the mapping of
sequence reads and the computation of gene-level expression indexes. I will
also discuss some problems that may require further research, such as the
modeling of paired sequence reads, the estimation of isoform-specific
expression, and the discovery of novel transcripts. |
Wing Hung Wong, Professor, Department of Health
Research and Policy and Department of Statistics, Professor Wong
received his BA in Mathematics and Statistics from the (1988-1994) of
Statistics at the Professor Wong
has made many seminal contributions to statistical theory and the biomedical
sciences. His is well known to the statistical community for his
contributions in data augmentation, He won the
COPSS award in 1993 and was recently elected to the US National Academy of
Sciences. He served as
associate editor for JASA, Annals of Statistics, Statistica
Sinica, IEEE/ACM,and is
on the editorial board of Journal of
Computational Biology and Annals of Applied Statistics. Professor Wong
is the advisor of 22 Ph.D. students, many of whom have become leaders of
statistical sciences. |
|
Challenges
and Opportunities for the Statistics Profession and for Professional
Statistical Societies |
Banquet Keynote
Speech, 7PM, June 23, 2009, Tuesday |
Ron Wasserstein
is Executive Director of the American Statistical Association. Prior to
joining the ASA staff, Ron was a faculty member and administrator for 23
years at |