With Picmonic, facts become pictures. We've taken what the science shows - image mnemonics work - but we've boosted the effectiveness by building and associating memorable characters, interesting audio stories, and built-in quizzing. Whether you're studying for your classes or getting ready for a big exam, we're here to help.
Studies risk from exposure
(Asks) "Who developed disease?"
(Asks) "Who will develop disease?"
Case Control Study
Compares those with disease to those without
(Asks) "What happened?"
(Asks) "What's happening?"
Data at one specific point in time
(Finds) frequency of disease
Relative Risk (RR)
Used in Cohort Studies
Risk of Developing Disease
a / (a + b)
Divided by /
c / (c + d)
When Low Prevalence Odds Ratio Approximates Relative Risk
Odds Ratio (OR)
Case Control Studies
Measures Association Between an Exposure and an Outcome
Odds of Exposure in Diseased (Sick) Group
a / c
Odds of Exposure in Healthy Group
b / d
=1 Exposure does not affect odds
> 1 Exposure increases disease
< 1 Exposure decreases disease
Common Statistical Tests
Determine If Comparing Numerical Or Categorical Variables
T-Test For Comparing Means Of Two Groups
ANOVA For Comparing Means In Greater Than Three Groups
Comparing Mean Values On Normal/Bell Distribution
Chi-Squared Test For Comparing Categorical Outcomes In Large Sample Sizes
Fisher's Exact Test For Comparing Categorical Outcomes In Small Sample Sizes
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