Epidemiology/ Ethics/ Psychiatry Flashcards
Sensitivity
A/ (A+C)
TP/ (TP+FN)
Positive test of disease/ Total disease
Specificity
D/ (B+D)
TN/ (TN+FP)
Negative test of no disease/ total no disease
Prevalence
Positive test/ total population
TP+FN/ Total
PPV
A/ (A+B)
TP/(TP+FP)
True positive/ (All positives)
The higher the disease prevalence that higher the PPV
NPV
D/ (C+D)
TN/(FN+TN)
True negatives/ All negatives
Likelihood ratio (LR)
+LR= sensitivity / (1-specificity)
NNT
NNT= 1/ absolute risk reduction
Odds ratio
OR= (A/C)/ (B/D)
OR= AD/ BC
Relative risk
RR= [A/(A+B)]/ [C/(C+D)]
Risk of developing disease in those exposed divided by risk of disease in unexposed
Absolute risk reduction
ARR= [C/C+D] -[A/(A+B)]
The difference in risk attributable to the intervention compared to the control
Cohort
Exposure —> disease
Case control
Diseased and non-diseased into two group trying to find exposure
Odds ratio
Type I (alpha) error
Concluding there is a difference when there is not
False positive
Rejecting the null hypothesis when it should not be rejected
Type II (beta) error
No difference when there is
False negative
P value
estimate of the probability that differences in treatment effects in a study could have happened by chance alone
P < 0.05 statistically significant
Reject null hypothesis which states no correlation
Power
What increased power?
Probability that a study will find a statistically significant difference when one is truly there
Increase number of subjects increases power
Power= 1 - type II error (beta)
Live vaccines
MMR Polio (Sabin) Yellow fever Influenza (nasal) Varicella
Inactivated vaccines
Cholera HAV Polio (Salk) Rabies Influenza (injection)
Toxoid vaccines
Diphtheria
Tetanus
Informed consent
BRAIN
Benefits Risk Alternatives Indications Nature
Absence of living will
SPOUSE CHIPS in For the patient
SPOUSE CHIldren Parent Sibling Friend
Distribution in 95%
Mean 230
SD 10 mg/dL
2 SD from mean
210 - 250
Stand deviation distribution
68% (middle)= 1 standard deviation
95%= 2 SD
99.7 (outside)= 3 SD
Inquire about possible risk factors and outcomes at a specific point in time (snap shot)
Cross-sectional study
Type of observational study
Ascertainment (sampling) bias
Study population differs from target population due to nonrandom selection methods
Berkson bias
Disease studied using only hospital based patients may lead to results not applicable to target population
Neyman bias
Prevalence bias
Exposures that happen long before disease assessment can cause study to miss diseased patients that die early or recover
Move from point B to A
Change on sensitivity
Sensitive will increase
Fewer FN
Confounding bias vs effect modification
Effect modification
- results when an extraneous variable (modifer) changes the direction or strength of an association
Modifier is associated with disease but not the risk factor
Confounding bias
- extraneous factor associated with both exposure and disease
Tourette syndrome Tx
First line: aripiprazole
Tetrabenazine (dopamine depleting agents)
MRI of schizophrenia
Enlarged ventricles
Decreased cortical volume
SE Haloperidol
QTc prolongation
EPS
QTc prolongation
Haloperidol
Ziprasidone
Clozapine SE
Agranulocytosis
EPS
4 and A
4 hrs: Acute dystonia
4 days: Akinesia
4 weeks: Akathisia
4 months: Tardive dyskinesia
ADAPT Hours to days: Acute Dystonia (Muscle spasm, stiffness, oculogyric grisis) (prolonged involuntary gaze upward) - Benztropine - Diphenhydramine
Days to months: Akathiasia, Parkinsonism (restlessness, bradykinesia) - Beta blockers - Benzodiazepine (lorazepam) - Benztropine --- -Benztropine - Amantadine
Months to years: Tardive dyskinesia
(orofacial chorea)
- Valbenazine
- Deutetrabenazine
Prolonged painful tonic muscle contractions or spasm
Acute dystonia
Hours
Tx: Benztropine (anticholinergics)
Restlessness that is perceived as being distressing
Akathasia
Day
Tx: Betablockers (propranolol)
Pseudoparkinsonism
EPS
Dyskinesia
Benztropine (anticholinergics) or dopamine agonist (amantadine)
Involuntary, painless oral facial movements
Tardive dyskinesia
Switch neurolepic to clozapien or risperidone
Dont mix with Buspirione
MAOIs
Tx Social anxiety disorder
Beta blockers
OCD Tx
SSRI
Or Clomipramine (TCA)
TX PTSD
CBT
SSRI, SNRI
Prazosin (alpha blocker) for nightmares
Alzheimers tx
Cholinesterase inhibitors
- Donepezil
- Rivastigmine
- Galantamine
Moderate to severe
- Add Memantine (NMDA antagonist)
SIG E CAPS
Sleep Interest Guilt Energy Concentration Appetite Psychomotor agitation Suicidal ideation
TCA toxicity
Tri-Cs
Convulsions
Coma
Cardiac arrhythmias
Paroxetine
SSRI
Avoided in pregnancy
- Cardiac defects
- pulmonary Htn
Mirtazapine
WG
MAOIs
MAO Take Pride In Shanghai
Tranylcycpromine
Phenelzine
Isocarboxazid
Selegilline
SE: HTN crisis
DIG FAST
Distractibility Insomnia Grandiosity Flight of ideas Activites Sexual indiscretion Talkative/ pressure speech
Mania
> 1 week
Mania 1st line tx
Lithium
Lithium toxicity
Ataxia
Dysarthria
Delirium
Acute renal failure
Naltrexone
first line tx for craving of alcohol
Blocks u opioid receptor
SE TCAs
Orthostatic Hypotension
High QTC
470 or 480
Antipsychotic to give if over weight
Abilify (arippiprazole)
Physiology of schizophrenia
Increased DA in mesolimbic
Decreased DA in mesocortical
Mental status changes (not psychosis)
- delirium
Muscle rigidity +/- tremor (lead pipe rigidity)
Hyperthermia
Rhabdomyolysis
Autonomic instability
- tachycardia, high blood pressure, tachypnea, diaphoresis
Due to
Tx
Neuroleptic malignant syndrome
Due to antipsychotics
Tx: Dantrolene
Bromocriptine
Elevated creatinine phosphokinase
Which antipsychotic is most closely associated iwth an increased risk of diabetes
Olanzapine
SNRI for fibromyalgia
Milnacipran
Chronic pain tx
Duloxetine
SNRI
Fibromyalgia tx
MIlnacipran (SNRI)
Amitriptyline (TCA)
Tx neuropathic pain
Amitriptyline
Antidepressant the causes appetite stimulant and weight gain
Mirtrazapine
Serotonin syndrome signs
Hyperreflexia and clonus
Hyperthermia
Autonomic instability
- Cardiovascular collapse, mental status changes
Bulimina nervosa labs
Hypokalemic
Hypochloremic
Metabolic alkalosis
Non-anion gap metabolic alkalosis w/ respiratory compensation
Metabolic acidosis (laxative abuse)
Elevated bicarbonate
Incrased BUn
Hypernatremia
Increased amylase
Fixation
partially remaining at childish level of development
Reaction formation
Taking unacceptable thoughts and attempting to over exaggerate in opposite action
Projection
Taking unacceptable thoughts and believing that someone else has those thoughts
Displacement
Substitutes new aim/ object for something that is undesirable
man yells at family for bad day at work
Sublimation
unacceptable impulses or feelings transformed into socially acceptable actions
Suppression
Voluntarily choosing to not think about something
Opioid withdrawal symptoms
Sweating Dilated pupils piloerection yawning Rhinorrhea Flu like
Tx:
Moderate: Clonidine (autonomic signs)
Severe: Methadone, suboxone
Reversal agent for benzo
Flumazenil
- blockade of GABAergic neurotransmission
Can cause seizure
Reversal agent for opioids
Naloxone
Naltrexone
Severe depression, HA, fatigue, insomnia/ hypersomnia, hunger
Cocaine and amphetamine withdrawal
Pinpoint pupils
N/V
Seizures
Opioid overdose
Belligerence, impulsivness, nystagmus, homicidal ideation, psychosis
PCP intoxication
Anxiety, piloerection, yawning, fever, rhinorhea, nausea, diarrhea
opioid withdrawal
Identification
Acting like the person you have positive thoughts towards (changing where you wear sthetoscope
Intellectualization
using logic or fact to emotionally distance onself from stressful situation
Patient on risperidone, increased dose now smiles less and slowed down. Mild tremor and doesnt swing arms when walking
TX
Continue Risperidone and add benztropine
anti-psychotic induced parkinsonism
Tx anticholinergic antiparkinism benztropine or amantadine
Sudden sustained contraction of neck, mouth, tongue and eye muscles
Tx
Acute dystonia
Benztropine
Diphenhydramine
Subjective restlessness, inability to sit still
Tx
Akathisia
Beta blocker (propranolol)
Benzodiazepine (lorazepam)
Benztropine
Gradual onset tremor, rigidity and bradykinesia
Tx
Parkinsonism
Benztropine
Amantadine
Gradual onset after prolonged therapy (> 6 months). Dyskinesia of the mouth, face, trunk and extremities
Tardive dyskinesia
Discontinue medication
Switch to quetiapine or clozapine
Treat with Valbenazine
Deutetrabenazine
Caused by dopamine receptor D2 upregulation and supersensitivity
Psychological features Depression Fatigue Hypersomnia Increased dreaming Hyperphagia Impaired concentration
Cocaine withdrawal
Anxiety Insomnia Tremors Tachycardia HTN
Alcohol withdrawal
Dysphoria
Myalgia
Yawning
Abdominal cramping
Opioid withdrawl
Dieting Hallucinations Abominal pain Constipation Tingling sensation in finger tips
Acute intermittent porphyria
Elevated urinary porphobilinogen levels
Painful abdomen Port wine colored urine Polyneuropathy Psylogical disturbances Precipitated by Drugs, alcohol and starvation
Alcohol withdrawal symptoms (5)
Anxiety Insomnia Tremors Tachycardia HTN
Opioid withdrawal symptoms (4)
Dysphoria (dissatifcation with life)
Myalgia (muscle pain)
Yawning
Abdominal cramping
MDD Sleep traits
Decreased REM sleep latency (the time from sleep onset until the start of the first REM sleep period
Decreased slow wave sleep
Increased total REM sleep duration
Physiology associated with suicidal behavior
Low levels of 5-hydroxyindoleacetic acid (5-HIAA) in CSF
Metabolite of serotonin
Hepatotoxicity medication
Valproate (mood stabilizer)
Bipolar plus hypercalcemia medication
Lithium
Antipsychotic medication effects
- Antipsychotic efficacy the pathway effected
Decreased Dopamine in mesolimbic
Antipsychotic medication effects
- EPS pathways
Decrease in Dopamine in nigrostriatal
Antipsychotic medication effects
- Hyperprolactinemia pathway
Decrease Dopamine in tuberoinfundibular
Increased dopamine in mesolimbic
Euphoric and psychotic symptoms
Patient excusing or justifying an attitude or event by developing an alternate explanation or shifting the blame
Man speed who crashes into other drive. Other drives fault for not paying attention
Rationialization
`
Involuntary contraction of small muscles groups like repeated contraction of fingers in one hand
Tardive dyskinesia
Watch for what with Lamotrigine
Rash
Steven Johnson syndrome
Toxic epidermal necrosis
Channeling uncomfortable thoughts or emotions into more acceptable behavior
Sublimation
Acting out is always a negative reaction
Man who like risky behavior becomes stunt man
Sublimation
Riluzole
MOA
ALS
Decrease glutamate excitotoxicity
Drug of choice for supervised heroin withdrawal inpatient
Drug of choice for supervised heroin withdrawal inpatient
Buprenorphine
Buprenorphine/ naloxone
Nloxone component prevents abuse of buprenorphine
Antipsychotic which doesnt cause hyperprolactinemia in preexisting hyperprolactinemia
Clozapine
Dementia
Pupillary changes (anisocoria different sized pupils)
Ataxia
Urinary incontinence
Impaired peripheral vibratory and proprioceptive sensation
Neurosyphilis
Risperidone causes orthostatic hypotension by
Cross reactivity as an alpha 1 adrenergic antagonist impairing binding of norepinephrine to alpha 1 receptor
Schizophrenia brain changes
Deterioration of Hippocampus
Auditory hallucination are from what part of the brain
Temporal lobe
Generalized anxiety disorder lab level
Elevated cortisol
OCD due to what part of brain
Cerebral cortex or basal ganglia
clonus=
serotonin syndrome
Lorazepam vs other benzo
Lorazepam is not metabolized by liver
Breathing techniques target what NT
Norepinephrine
Alcohol changes on sleep
Decreased REM sleep
Decreased sleep latency (shorter time to fall asleep)
Increased sleep fragmentation (increased nighttime awakenings)
Visual hallucinations in those that are blind
Charles Bonnet syndrome
Neutropenia in patient
Clozapine
Carbamazepine
Carbamazepine SE (6)
Agraulocytosis
Stevens-Johnson syndrome
Teratogenic in pregnancy
Cytochrome P450 induction
Hyponatremia
Hepatotoxicity
Drugs that induce mania or psychosis is patients with previous history of disease (6)
Corticosteriods
Thyroxine Dopaminergic anti-parkinsonian drugs Amphetamines Cocaine PCP
Alcohol withdrawal what predisoses to seizures
Hypomagnesemia
Opioid that doesnt cause miosis
Meperidine
Delirium on EEG
Diffuse background slowing
Delirium tremens opposite: fast EEG activity
What is associated with aggressive and impulsiveness lab
Low levels of serotonin in CSF
Kleptomania comorbid with
Bulimia nervosa
Durham insanity defense
Criminal act resulted from mental illness
OTC drugs that can cause serotonin syndrome
St. John’s wort
dextromethorphan
M’Naghten insanity defense
Person did not understand what he/she was doing was wrong
Miosis pupil size
Mydrasis pupil size
Miosis less than 2 mm
Mydrasis larger than 4 mm
What inhibits lamotrigine
Valproic acid
Cant sleep
Not hungry
Depressed
Mirtazapine
- helps with sleep and increases appetite
Started on new medications
HTN
Cant move spontaneously
Fever
Confused
Neuroleptic malignant syndrome
Dysregulation of dopamine
Help with alcohol cravings
Naltrexone
Acamprosate
Naloxone
Short acting opioid antagonist
Used to tx opioid intoxication
Bipolar tx
Quetipine
Lithium (not if renal issue)
Valproate
[Before haloperidol]
Women upset with having to take care of her father then is very kind and caring and offers to get him water multiple times
Reaction formation
SE SSRI
HA
Insomnia
Nausea
Psychosis with rapid speach
Now how hypercalcemia
What medication
Lithium
Risk of seizures
Clozapine
tx acute mania
Olanzapine
Lithium
Valproate (oral)
Pin point pupils
Negative drug screen
Oxycodone
Acute onset psychosis in child
Arthralgia
Thrombocytopenia
Hematuria
Proteinuria
SLE
Check ANA
Tx resistant schizophrenia
Clozapine
Antipsychotic
Has DM
Ziprasidone
[Avoid olanzapine]
HA Tachycardia Palpitations Sweating HTN- drug resistant
Hyperglycemia
Pheochromocytoma
Night terrors last
1-2 years
Resolve spontaneously
Seen in MDD
Increased serum cortisol concentration
Decreased REM sleep latency
Decreased slow wave sleep
Quetiapine MOA
Serotonin 2A
Dopamine D2 receptor blockade
Antipsychotics work on
D2 receptors
Norepinephrine and dopamine reuptake inhibition
Bupropion
Serotonin and noreepinephrine reuptake inhibition
Venlafaxine
SNRI
Tricyclic antidepressants
Distruptive mood dysregulation disorder
Irritable or angry mood together with temper tantrums that are out of proportion
Not made prior to six or after age 18
Parkinson disease with psychotic symptoms
Tx
Dopamine agonists (pramipexole) are at greater risk of psychosis
Quetiapine
Clozapine
False positive phencyclidine (4)
Dextromethorphan
Diphenhydramine
Ketamine
Tramadol
Venlafaxine
False positive Amphetamine (4)
Atenolol
Propranolol
Bupropion
Nasal decongestants
Tremor
Hyperreflexia
Myoclonus
Serotonin syndrome
Citalopram + MAOI (less than 2 week wash out period)
Generalized rigidity
Confusion
Fever
Neuroleptic malignant syndrome
Due to Risperidone
Tx Dantrolene
Bromocriptine
NMS vs Serotonin syndrome
NMS
- High fevers
- Rigidity
SS
- Tremor
- Hyperreflexia
- Myoclonus
Amnesia of a particular event
Traveling or wandering
Doesnt know who they are
Doesnt recognize his name
Father recently passed away
Dissociative amnesia
Loss of time and place
No loss of personal identy
Transient global amnesia
MDD and Worsening diabetic neuropathy
SNRI
Duloxetine
MDD with psychotic features Tx
Sertraline
Risperidone
Fatigue
Constipation
Myalgias
What drug
Lithium
Hypothyroidism
Antidepressant or Antipsychotic
Causes WL and HTN
Venlafaxine
SNRI
Dose-dependent HTN
Galactorrhea
Impotence
Menstrual dysfunction
Decreased libido
Medication
Dopamine antagonists
Chlorpromazine
Promethazine
Risperidone
Quetipine
Clozepine
Mother who is angry at her husband yells at her child
Displacement
Girl who is upset with her best friend acts overly kind
Reaction formation
Hospitalized 10 year old begins to wet his bed
Regression
Young weight lifter receives IV haloperidol and complains that his eyes are deviated sideways
Diagnosis
Tx
Acute dystonia
(Oculogyric crisis)
Tx: Benztropine
Diphenhydramine
Medications to avoid in patients with history of alcohol withdrawal seizures
Neuroleptics
Lower the seizure threshold
Aripiprazole Clozapine Lurasidone Olanzapine Quetiapine Risperidone
Previously healthy 6 month old girl has decrease in head growth
Truncal discoordination
Decreased social interaction
Rett disorder
Regression and loss of milestones is common
Hand wringing
Severe hypoglycemia
Blood analysis reveals no elevation in C peptide
Factitious disorder
Schizophrenic patient that takes haloperidol for 1 year and develops uncontrollable tongue movements.
Diagnosis?
Tx?
Tardive dyskinesia
Decrease or discontinue haloperidol
Switch to risperidone or clozapine
Delayed sleep wake disorder
Excessive morning sleepiness
Sleep until 11 AM naturally
Advanced sleep wake disorder
Inability to stay awake in evening (usually after 7 pm)
More people have been diagnosed with leukemia in town A than B. Which of the following designs would be best suited to determine whether a towns location is related to apparent difference in leukemia?
A. Case control B. Case series C. Clinical trial D. Cohort E. Ecological
D. Cohort
Study in which groups are chosen based upon presence or absence of one or more risk factors
All subjects develop disease of interest
Incidence
Case control study
Subjects with the disease of interest (cases) are compared to otherwise similar group of disease-free subjects
Information is collect about exposure to risk factors
Retrospective
Odds ratio
Case series
Study involving only patients already diagnosed with condition of interest
Can be helpful in determining the natural history of uncommon conditions
Ecological studies
Unit of observation is population
Disease rates and exposures are measured in 2 or more populations
Associated between disease rates and exposure is determined
Study to determine incidence
Cohort
ARR
Risk of placebo- risk with treatment
%
NNT= 1/ ARR%
PPV
True positives/ Total positive
Synthetic cathinones
Bath salts
Negative drug screen
Breast mass
Negative fnA
What are the chances that she really does not have breast cancer?
A. Sensitivity B. Specificity C. PPV D. NPV E. Validity
D. NPV
Probability of being free of disease if test results are negative
NPV with vary with the pretest probability of a disease
A patient with high probability of having a disease will have a low NPV
[Specificity: probability that when the disease is absent, the test is negative]
Vs probably a person with a negative test actually doesnt have disease
Severe nausea and vomiting after receiving chemotherapy
Hx Bipolar and alcohol abuse
Lithium and lamotrigine
Lithium level 0.6 (normal 0.6-1.2)
Tx IV saline and antiemetic
Several hours later= sudden neck pain, neck muscle stiffness and difficulty speaking
What medication caused this? A. Aprepitant B. Hydroxyzine C. Lamotrigine D. Lithium E. Metoclopramide F. Ondansetron
E. Metoclopramide
Acute dystonia= EPS
Dopamine antagonists like antiemetics (metoclopramide and prochlorperazine)
Randomization helps prevent
Confounding
Even distributes confounding variables
Effect modification
Results when an external variable positively or negatively impacts the effect of a risk factor on the disease of interest
Risk of venous thrombosis is increased by estrogen but is augmented by smoking
Post hoc analysis
Performing unplanned statistical tests on patterns that were identified after the fact in data from a completed study
Loss to follow up results in what bias
Selection bias known as attrition bias
Reporting bias
Occurs when a subject is reluctant to report an exposure due to stigma about the exposure (sexual behavior, drug use)
Surveillance bias
Exposed group undergoes increased monitoring relative to the general population
When treatment regimen selected for a patient depends on severity of patients condition
Selection bias
Susceptibility bias (confounding by indication)
HIV < 200
Ventricular enlargement
Diffuse white matter changes
HIV associated neurocognitive disorder
Diffuse brain atrophy
Ventricular enlargement
Diffuse white matter changes
Progressive multifocal leukoencephalopathy
Reactivation of JC virus
Altered mental status
Motor deficits
- Focal arm/leg weakness or hemiparesis
- Ataxia
- Vision abnormalities
MRI: well delineated asymmetric white matter lesions (not diffuse like HIV)
Study showed that women with high baseline saturated fat consumption have 4x risk of colorectal cancer in 7 year period compared to low fat consumption
RR= 4.0, 95% CI= 1.5-6.5
According to study results, what percentage of colorectal carcinoma in women with high fat consumption could be attributed to diet?
Attributable risk (ARP)
ARP= (risk in exposed - risk in unexposed) / risk in exposed
ARP= (RR-1)/ RR
ARP= (4.0-1)/ 4.0= 75%
Shifting curve to right by increase cutoff value effect on
TP
Sensitivity
Specificity
TP would decrease
So sensitivity would decrease
Fewer individuals without the disease would test positive so increase TN —> increase specificity
Delirium patient that is violent what to give
Haloperidol
Relative risk in what study
Cohort
Odds ratio used in what study
Case control
Disease prevalence used in what study
Cross sectional study
Case control measure
Odds ratio
Cross sectional study measures
Disease Prevalence
Cohort measures
Relative risk