Analyzing and Interpreting Large Datasets

PARTICIPANT WORKBOOK

variables

Measures of association

testing

analysis stratify

Descriptive analysis

univariable

bivariable design

justify

table

shells

assess

calculate

confounding

statistical

software

confidence intervals

plan

Analyzing and Interpreting Large

Datasets

Created: 2013

Analyzing and Interpreting Large Datasets. Atlanta, GA: Centers for Disease Control and Prevention (CDC), 2013.

ANALYZING AND INTERPRETING LARGE DATASETS

Table Of Contents

INTRODUCTION ................................................................................................................ 4 LEARNING OBJECTIVES......................................................................................................4 ESTIMATED COMPLETION TIME...........................................................................................4 TARGET AUDIENCE............................................................................................................4 PRE-WORK AND PREREQUISITES ........................................................................................4 ABOUT THIS WORKBOOK AND THE ACTIVITY WORKBOOK ......................................................4 ICON GLOSSARY ...............................................................................................................5 ACKNOWLEDGEMENTS ....................................................................................................... 5

SECTION 1: OVERVIEW...................................................................................................7 INTRODUCTION TO DATA ANALYSIS .....................................................................................7 STEPS IN ANALYZING NCD DATA .......................................................................................7 KEY CONCEPTS ................................................................................................................ 8

SECTION 2: DESCRIPTIVE ANALYSIS ......................................................................... 15 OVERVIEW OF DESCRIPTIVE ANALYSIS..............................................................................15 UNIVARIABLE ANALYSIS ................................................................................................... 16 KEY POINTS TO REMEMBER ............................................................................................. 22 BIVARIABLE ANALYSIS ..................................................................................................... 26

SECTION 3: ANALYTIC EPIDEMIOLOGY ..................................................................... 36 OVERVIEW ...................................................................................................................... 36 CONCEPTS OF ASSOCIATION ............................................................................................ 36 KEY POINTS TO REMEMBER ............................................................................................. 40 STATISTICAL SIGNIFICANCE TESTING ................................................................................ 43 CONFIDENCE INTERVALS..................................................................................................45 KEY POINTS TO REMEMBER ............................................................................................. 46 STRATIFIED ANALYSIS ..................................................................................................... 47 EFFECT MEASURE MODIFICATION.....................................................................................48 CONFOUNDING................................................................................................................ 52 SUMMARY OF EMM AND CONFOUNDING ........................................................................... 57 KEY POINTS TO REMEMBER ............................................................................................. 58

SECTION 4: INTERPRETING AND REPORTING YOUR FINDINGS ............................. 63 RESOURCES .................................................................................................................. 71

APPENDICES ..................................................................................................................72

APPENDIX A ...................................................................................................................73

PARTICIPANT WORKBOOK |2

ANALYZING AND INTERPRETING LARGE DATASETS

APPENDIX B ...................................................................................................................75

PARTICIPANT WORKBOOK |3

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