Physician Assistant (PA)
First Aid for the USMLE Step 1 (2021)
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Ace Your First Aid for the USMLE Step 1 (2021) Classes and Exams with Picmonic: #1 Visual Mnemonic Study Tool for Physician Assistant (PA) Students

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First Aid for the USMLE Step 1 (2021) | Physician Assistant (PA) School Study Aid

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4 Picmonics to Learn | 7 mins
Cross-Sectional Study
(Asks) "What's Happening?"
Data at One Specific Point in Time
(Finds) Frequency of Disease
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49 secs
Case Control Study
Compares those with disease to those without
(Asks) "What happened?"
Odds Ratio
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47 secs
Cohort Study
Studies risk from exposure
(Asks) "Who developed disease?"
(Asks) "Who will develop disease?"
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1 min
Common Statistical Tests
Determine If Comparing Numerical Or Categorical Variables
Numerical 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
Categorical Variables
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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4 mins

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