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2008 EASInc. Web PDC
Censored Data Analysis II - Advanced Concepts and Decision Making (0.5 CM)
Date - May 21, 2008 (2:00-4:30 PM U.S. Eastern time (1400-1630) (add
5 hours for Greenwich time)
Location - WebPDC
A pdf file of the handouts will be emailed to registered participants several
days prior to the WebPDC as well as the phone number for audio and instructions
regarding how to log onto the WebPDC.
NOTE: The phone number for audio will not be a toll-free number. Participants
will be responsible for their own long distance charges.
NOTE: The email address submitted at the time of payment will be used for
all email communications and for logging onto the WebPDC.
NOTE: The registration and participation policy for each Web PDC is the same
as for a fixed location or on-site PDC. Each particpant must register. Registration
is per participant, not per viewing site. Only those registered should
view and particpant in this WebPDC.
Instructor: Dr. Paul Hewett Ph.D. CIH
Course description:
This 2.5 hour webinar PDC consists of Part II of a two part introduction
to Censored Data Analysis (CDA). CDA refers to the analysis and interpretation
of datasets containing one or more occupational exposure measurements below
the field limit of detection (i.e., the Minimally Detectable Concentration).
(See the list of Prerequisites.)
In Part II the standard and so-called "robust" methods in the four
families of CDA methods - Substitution, Log-probit Regression, and Maximum
Likelihood Estimation, and non-parametric methods - will be discussed in more
detail; confidence intervals and hypothesis testing will be discussed, as
well as decision making when confronted with highly and severely censored
datasets. Last, the student will be introduced to the analysis of censored
data using Bayesian Decision Analysis.
The webinar will last 2.5 hours, with an additional 30 minutes for followup
questions and clarifications. Each student must, within 2 weeks of the seminar,
complete a 20 question test that (the test will require approximately 30 to
60 minutes). In addition, the students are encouraged to read the suggested
references prior to the webinar. A certificate and 0.5 CM points will be awarded
to those students that both attend the webinar and complete the 20 question
test.
Learning Objectives:
(1) Comprehensive review of the various standard and "robust" Censored
Data Analysis (CDA) methods - both principles and issues
(2) Calculation of confidence intervals and their use in decision making
(3) Decision making when confronted with a highly or severely censored dataset
(4) Understand how bias and precision affect the accuracy of the various CDA
methods for both simple and complex censored datasets as well as lognormal
and contaminated lognormal exposure profiles
(5) Introduction to the use of Bayesian Decision Analysis to interpret censored
datasets
(6) Review of recommendations and controversies in the CDA literature.
Agenda (see list of presentations)
Fees / Sign Up
Registration - $275 per participant
The WebPDC class size is limited. Registration closes when the maximum class
size is reached or 6:30PM EST (2330 GMT) on Tuesday May 20.
NOTE: The registration and participation policy for this WebPDC is the same
as for a fixed location or on-site PDC. That is, registration is per participant,
not per viewing site. Only those registered should view and particpant in
this WebPDC.
Cancellation and Makeup Policy
A credit for an upcoming WebPDC or a full refund - minus a $50 fee - will
be provided for cancellations made up to five business days prior to the day
of the WebPDC. For example, if the WebPDC is presented on a Thursday the cancellation
must be made by 6:30PM EST the Tuesday before in order to qualify for a refund
(minus a $50 fee to cover credit card fees and adminstrative costs). No
refunds will be given if the notice of cancellation is not received within
5 business days of of the WebPDC.
Exposure Assessment Solutions, Inc. reserves the right to cancel a course
7 days prior to the start of the course, in which case a full refund or credit
will be given to each participant.
A video of the WebPDC will be available for viewing for a limited time after
the course for those unable to fully participate due to technical problems.
Prerequisites:
- participation in the WebPDC "Censored Data Analysis I - Basics"
- familiarity with the AIHA Exposure Assessment and Management Model (see
the AIHA monograph "A Strategy for Assessing and Managing Occupational
Exposures", 3rd Edition (2006)
- a working knowledge of the IHDataAnalyst
(full or Lite Edition).
- recommended reading prior to the WebPDC:
- Hewett, P. and Ganser, G.H. (2007): A Comparison of Several Methods for
Analyzing Censored Data. Annals of Occupational Hygiene 51:611-632.
- "Appendix VIII - Analysis of Censored Data" in the AIHA monograph
"in the AIHA monograph "A Strategy for Assessing and Managing Occupational
Exposures", 3rd Edition (2006)
Presentation List
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