# Amanda Shared "Unit 2 - CS" - 35 Picmonics

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### Unit 2 - CS

Sensitivity
Characteristics
Rules Out
Screening Test
Formula
TP / (FN+TP)
2 mins
Specificity
Characteristics
Rules In
Confirmatory Test
Formula
TN / (TN + FP)
1 min
Case Control Study
Observational
Retrospective
Compares those with disease to those without
(Asks) "What happened?"
Measurement
Odds Ratio
47 secs
Cohort Study
Observational
Longitudinal
Studies risk from exposure
Retrospective
(Asks) "Who developed disease?"
Prospective
(Asks) "Who will develop disease?"
1 min
Cross-Sectional Study
Observational
(Asks) "What's Happening?"
Data at One Specific Point in Time
(Finds) Frequency of Disease
Measurement
Prevalence
49 secs
Quantifying Risk: Contingency 2x2 Table Setup
Disease
Along Top (x axis)
Exposure
Along Side (y axis)
A: Exposed and Diseased (Sick)
B: Exposed and Healthy
C: Not Exposed and Diseased (Sick)
D: Not Exposed and Healthy
2 mins
Odds Ratio (OR)
Use
Case Control Studies
Measures Association Between an Exposure and an Outcome
Formula
Odds of Exposure in Diseased (Sick) Group
a / c
Divided /
Odds of Exposure in Healthy Group
b / d
Interpretation
=1 Exposure does not affect odds
> 1 Exposure increases disease
< 1 Exposure decreases disease
2 mins
Attributable Risk (AR)
Use
Proportion Exposure Increases Disease
Formula
Incidence of Diseased (Sick)
Equals =
Exposed Group
a / (a + b)
Minus -
Unexposed Group
c / (c + d)
1 min
Relative Risk (RR)
Use
Used in Cohort Studies
Formula
Risk of Developing Disease
Equals =
Exposed Group
a / (a + b)
Divided by /
Unexposed Group
c / (c + d)
When Low Prevalence Odds Ratio Approximates Relative Risk
2 mins
Positive Predictive Value (PPV)
Proportion of Positive Tests that are True Positive
Probability that Person with Positive Test has Disease
Formula
TP (True Positives)
Divided by /
All Positive Test Results
TP + FP
Considerations
Varies Directly with Prevalence
1 min
Negative Predictive Value (NPV)
Proportion of Negative Tests that are Truly Negative
Probability that Person with Negative Test is Healthy
Formula
(TN) True Negatives
Divided by /
All Negative Test Results
(FN + TN)
Considerations
Varies Inversely with Prevalence
1 min
Skin Anatomy
Characteristics
Epidermis
Keratinocytes
Melanocytes
Dendritic Cells
Merkel Cells
Dermis
Sweat Glands
Hair Follicles
Sebaceous Glands
Hypodermis
3 mins
Age 2 Months - Developmental Milestones
Gross Motor
Holds Head Up, But Unsteady
Fine Motor
Tracks Objects to the Midline
Language
Coos
Social / Cognitive
Social Smile
Recognizes Parents
1 min
Age 4 Months - Developmental Milestones
Gross Motor
Sits With Support
Rooting Reflex Disappears
Moro Reflex Disappears
Fine Motor
Reaches Across Midline
Language
Turns to Voice
Laughs
Social / Cognitive
Enjoys Looking Around
2 mins
Age 6 Months - Developmental Milestones
Gross Motor
Palmar Reflex Disappears
Sits Propped Up On Hands
Rolls
Fine Motor
Transfers Objects Hands to Hands
Raking Grasp
Language
Babbles
Responds to Name
Social / Cognitive
Stranger Anxiety Develops
2 mins
Age 9 Months - Developmental Milestones
Gross Motor
Pulls to Stand
Starts Cruising
Fine Motor
Three-Finger Pincer Grasp
Holds Bottle or Cup
Language
Starts Sounding "Mama" or "Dada"
Social / Cognitive
Waves Bye
Separation Anxiety
Plays Pat-A-Cake
2 mins
Age 1 Year - Developmental Milestones
Gross Motor
Stands Well
First Steps
Throws Ball
Points to Objects
Babinski Reflex Disappears
Fine Motor
Two-Finger Pincer Grasp
Language
"Mama & Dada"
Social / Cognitive
One-Step Commands with Gesture
2 mins
Age 18 Months - Developmental Milestones
Gross Motor
Climbs Up Stairs
Runs
Fine Motor
Stacks Three Blocks
Eats with Spoon
Removes Clothing
Language
10-25 Word Vocabulary
Social / Cognitive
āMineā
Pretend Play
2 mins
Age 2 Years - Developmental Milestones
Gross Motor
Jumps
Fine Motor
Copies a Line
Stacks Six Blocks
Turns Pages
Language
Two-Word Phrases
Half of Speech is Understandable
200 Words by Age 2
Social / Cognitive
Parallel Play
Begins Toilet Training
Rapprochement
2 mins
Age 3 Years - Developmental Milestones
Gross Motor
Walks Up/Down Steps with Alternating Feet
Rides Tricycle
Fine Motor
Stack Nine Block Tower
Copies Circle
Uses Utensils
Language
Three-Word Sentences
75% Speech Understood by Stranger
Social / Cognitive
Knows Gender / Age
2 mins