Visual Data Displays and Uses in Decision Making.
-
Upload
leo-stewart -
Category
Documents
-
view
212 -
download
0
Transcript of Visual Data Displays and Uses in Decision Making.
Visual Data Displays and Uses in Decision Making
Introduction
Suggestion of link between MMR and Autism in children
A Major concern to health care providers and elected officials
A Public catastrophe and loss of confidence in immunization
The two main arguments
Central Tendency
3 Statistical Analyses Poisson regression Vaccinated vs. unvaccinated kids Temporal relations
Central Tendency: Mean Median and Mode
Most Appropriate Measures
Mean age of reported casesMedian ages at diagnosisMode age when MMR vaccine was givenPresented with the variance and
standard deviation
Measure Of Variation
Children Were Classified Into Three Groups Vaccinated Before Or After 18 Months And Not Vaccinated
Parental Concern And On-Set Regression 30 Groups For Parental Concern 17 Age-Groups, And 21 Regression Groups
Conclusion Based On Variations
MMR Vaccinations Do Not Cause AutismIt Does Not Because
Record Keeping May Increase Prevalence
Diagnosis Varied Upon Vaccination Ages Children Not Vaccinated Were
Diagnosed No Evidence Of Temporal Clustering
Measurements And Normal Distribution
Standard Normal Distribution: symmetrical, bell-shaped curve with single peak
This study: steady significant upward trend followed by a sharp decline in core and atypical cases
About The Data
Compared to normal distribution:
this curve is skewed to the left shows a gradual rise w/ even
distribution sharp decline
Agree or Disagree With The Conclusion
Survey found no causal link between MMR and Autism Increase of Autism over time Findings reviewed No flaws found
Team agrees with study findings Other possibilities?
Summary
Suggestion is a hypothesis
Evidence does not support the idea.
ReferencesDeStefano, F., Chen, R.T. (2001). Autism and Measles-Mumps-
Rubella Vaccination controversy laid to Rest? CNS Drugs15(11), 831-837. Retrieved ---------from ebscohost.com
Simon.cs.vt.edu (2010). Measures of central tendency. Retrieved --------from http://simon.cs.vt.edu
ReferencesTaylor, B., Miller, E., Farrington, C.P., Petropoulos, M.C., Favot-
Mayaud, I., Li, J., & Waight, P.A. (1999, June 12). Autism and measles, mumps, and rubella vaccine: no epidemiological evidence for a causal association. The Lancet, 353, 2026-2029. Retrieved on ------, from the EBSCOhost database
U.S. Food and Drug Administration. (2010, March 31). Thimerosal in Vaccines. Retrieved ----------, from U.S. Food and Drug Administration Web Site: http://www.fda.gov/BiologicsBloodVaccines/SafetyAvailability/vaccineSafety/ucm096228.htm