Behavioral Science Flashcards

1
Q

Sensitivity equation?

A

TP/(TP+FN)

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2
Q

Specificity equation?

A

TN/(TN+FP)

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3
Q

PPV equation?

A

TP/(TP+FP)

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4
Q

NPV equation?

A

TN/(TN+FN)

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5
Q

Incidence rate?

A

new cases/# ppl at risk

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6
Q

Prevalance?

A

of existing cases/total # in population

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7
Q

Odds rato

A

(a/c)/(b/d)=ad/bc or (a/b)/(c/d)

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8
Q

Relative risk

A

(a/(a+b)/(c/(c+d))

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9
Q

Attributable risk

A

AR=(a/a+b)-(c/c+d)

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10
Q

Relative risk reduction

A

RRR=1-RR

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11
Q

Absolute risk reduction

A

c/c+d-(a/a+b)

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12
Q

Number needed to treat

A

NNT=1/ARR

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13
Q

Number needed to harm

A

NNH=1/AR

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14
Q

Risk (probability of developing a disease over a certain period of time)

A

(a/a+b)

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15
Q

Standard deviation vs Standard error in terms of description

A

Standard deviation-how much variability exists from the mean in a set of values
Standard error-variance in mean between the sample and the true population mean

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16
Q

When does mean=median=mode?

A

only in a normal distribution

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17
Q

Error in assigning subjects to a study group resulting in an unrepresentative sample

A

Selection bias

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18
Q

Awareness of disorder alters recall by subjects; common in retrospective studies

A

Recall bias

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19
Q

Information is gathered in a way that distorts it

A

Measurement bias

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20
Q

Subjects in different groups are not treated the same

A

Procedure bias

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21
Q

Researcher’s belief in the efficacy of a treatment changes the outcome of that treatment

A

Pygmalion effect seen in observer expectancy bias

22
Q

Sending survey out to patients 5 years after diagnosis is preferentially sampling those with low grade disease

A

Late-look bias

23
Q

When a factor is related to both the exposure and outcome, but not the causal pathway–> factor distorts or confuses effect of exposure on outcome

A

Confounding bias

24
Q

Present when the effect of the main exposure on the outcome is modified by the presence of another variable. It is a natural phenomenon that should be described, but not connected

A

Effect modification

25
Tendencey of subjects to change their behavior as a result of awareness that they are being studied
Hawthorne effect (or observer effect)
26
Early dectection is confused with increased survival
lead-time bias
27
Applied to both disease and pathogenesis and exposure to risk modifiers. Initial steps in pathogenesis and or expsoure to a risk factor sometimes occur years before clinical manifestations of disease are evident. Additionally, exposure to risk modifiers may need to be continuous over a period of time before influencing the outcome
Latent period
28
How can you increase power and decrease Beta
Increase sample size, increase expected effect size, increase precision of measurement
29
confidence interval equation
mean+/z(SEM)
30
What happens if CI between 2 groups overlap?
No significant difference exists
31
What happens if CI between 2 groups do not overlap?
Significant difference exists
32
If 95% CI for 2 variables includes 0 (null value), what happens?
H0 is not rejected and no significant difference exists
33
If 95% CI for odds ratio or relative risk includes 1 (null value), what happens?
H0 is not rejected and and no significant difference exists
34
A 95% CI that does not cross the null value corresponds to what?
35
A 99% CI that does not cross the null value corresponds to what?
36
Exception to medicare for >65
37
4 parts of informed consent
Discloure, Understanding, Capacity (ability to reason and make one's own decisions), Voluntariness
38
2 situations where parental consent does not need to be obtained for minor
Emergent treatment or legally emancipated
39
3 situations where parenteral consent is not required
1) Sex (contraception, STIs, pregnancy) 2) Drugs (addiction) 3) Rock and roll (emergency and trauma)
40
Capacity vs Competency
Capacity-ability to reason and make one's own decisions | Competency-legal determination
41
Can a patient who is incompetent revoke a medical power of attorney?
Yes
42
What 2 things do not decrease as you get older?
Sexual interest, intelligence
43
Common causes of death by age
Congenital malformation, Preterm birth, SIDS
44
Common causes of death age 1-14 year
Unintentional injury, Cancer, Congenital malformations
45
Common causes of death 15-34 year
Untintentional injury, Suicide, Homicide
46
Common causes of death 35-44 years
Unintential injury, Cancer, Heart disease
47
Common cause of death 45-64 year
Cancer, Heart disease, Unintentional injury
48
Common cause of death 65 year +
Heart disease, Cancer, Chronic respiratory disease
49
What is presbycusis
Sensorineural hearing loss (often of higher frequencies) due to destruction of hair cells at the base. Lower frequency sounds is preserved becuause hair cells at apex preserved
50
Cessation of what is the most effective preventative intervention in almost all patients
Smoking cessation