Population Health Exam 1 Flashcards
What are the 3 parts of pharmacoeconomics?
-Costs
-Interventions
-Outcomes
True or False: Healthcare costs in the US are rising but healthcare outcomes are declining
True
What are the 4 types of costs?
- Direct medical costs
- Direct non-medical costs
- Indirect costs
- Intangible costs
What are direct medical costs?
Medical costs for providing treatment
ex: cost of medication, physician visits, hospitalizations
What are direct non-medical costs?
Costs to patient/family that are directly associated with treatment but ARE NOT MEDICAL
ex: cost of transportation to clinic, babysitter, food/lodging
(associated with medical treatment but not specifically to therapy)
What are indirect costs?
Result from loss of productivity because of illness or death
*Do not involve a transfer of money
ex: Missed work or school days, decreased productivity
What are intangible costs?
Costs of pain, suffering, anxiety, or fatigue due to illness or treatment
*Difficult to measure and assign value to
What are the 4 types of pharmacoeconomic analyses?
Cost-minimization analysis (CMA)
Cost-benefit analysis (CBA)
Cost-effectiveness analysis (CEA)
Cost-utility analysis (CUA)
What is a Cost-Minimization Analysis (CMA)?
Used to compare costs of interventions with EQUIVALENT CLINICAL OUTCOMES
What is the defining point of cost-minimization analysis?
Interventions must have EQUIVALENT CLINICAL OUTCOMES
What are some examples of Cost-Minimization Analyses?
Generic vs Brand name drugs
Drug A vs Drug B (equal efficacy and safety + same drug class)
What is the cost measurement unit of the cost-minimization analysis (CMA)?
$$
What is the outcome measurement unit of the cost-minimization analysis (CMA)?
*Not measured
*Assumed to be equivalent
What is a Cost-Benefit Analysis (CBA)?
Measures cost of interventions and outcomes in monetary units
*determines which intervention provides the best monetary benefit
*must assign monetary outcome to clinical endpoints (things we normally do not think about monetarily)
What is the cost measurement unit and outcome measurement unit of a cost-benefit analysis (CBA)?
$$
(for both)
What is a Cost-Effectiveness Analysis (CEA)?
Measures outcomes in natural health units
**Determines which intervention achieves a given objective at the lowest cost
*Compares different interventions using same measured outcome
ex: infections cured, lives saved, number of life years saved
What is the most common type of analysis?
Cost-Effectiveness Analysis (CEA)
What is the equation for the Incremental Cost-Effectiveness Ratio (ICER)?
Total $ of A - Total $ of B
_____________________________
Outcome of A- Outcome of B
What does the Incremental Cost-Effectiveness ratio (ICER) tell us?
The additional cost required to obtain the additional effect gained by switching from Drug A to Drug B
What is the cost measurement unit and outcome measurement unit of the cost-effectiveness analysis (CEA)?
Cost Mes Unit: $$
Outcome Mes Unit: Natural (Health) Related Units
What is the Cost-Utility Analysis (CUA)?
Measures outcomes in terms of the quality of the outcome produced
*Examines the cost of an intervention and the value of the outcome
“Utility Units”
*Most common outcome is quality-adjusted life years (QALY)
What two things are taken into account with QALY?
Quantity and Quality of life
How do we calculate QALY?
Amount of time in health state x % of health
*do for each drug
What is the cost measurement unit and outcome measurement unit of the Cost-Utility Analysis?
Cost Mes Unit: $$
Outcome Mes Unit: QALY or other utility measures (patient preferences)
What is a benefit of the Cost-Utility Analysis (CUA)?
Accounts for both quantity and quality of the outcome
What is pharmacoepidemiology?
Study of the use, risks, and benefits of drugs in populations
What is pharmacovigilance?
Continual monitoring for unwanted effects and other safety-related aspects of marketed drugs
What is comparative effectiveness research (CER)?
Determining what therapeutic intervention (not just drug products) works best for a given disorder in patients likely to be seen in clinical practice
What is pragmatic research?
Studies (often using randomization) that test small practical changes that could impact health outcomes
What type of study is considered “experimental”?
Randomized Control Trial (RCT)
**all others are nonexperimental
*we can control causality
What studies are considered nonexperimental (observational)?
Case-control
Cohort
*we cannot control exposure to drug, just gather individuals who have been exposed
What studies are considered observational?
Pharmacoepidemiologic
Pharmacovigilance
What is the difference between bias vs confounding?
Bias: systematic deviation from the truth that distorts the results of research
Confounding: relationship between treatment and response is actually attributable to another variable
*independently related to both the exposure and the outcome
What is information bias?
Bias related to information about exposure or outcome
*includes measurement and/or classification error
ex: Hawthorne effect
What is detection bias?
Specific outcome is diagnosed preferentially in subjects exposed to the agent
What does “confounding by indication” mean?
The indication for a drug or severity of disease predicts the use of the drug
*the risk of an event is related to the INDICATION for use of a drug but not the use of the drug itself
*When the reason for a prescription is associated with the outcome of interest
What is selection bias?
Bias related to procedures used to select subjects/influence study participation
*can be due to systematic differences in characteristics between those who are selected for the study and those who are not
What is referral bias?
Reason for encounter is related to drug treatment
What is protopathic bias?
Drug is initiated to treat an adverse event related to an undiagnosed disease
What is prevalence bias?
Prevalent cases rather than new cases are selected
What is Immortal Time Bias?
A period of follow-up when, due to exposure definition, the outcome being studied could never occur
(follow up includes a period of time where an event or death cannot occur)
immortal period
ex: heart transplant patients who died before receiving a transplant were automatically bumped to the no transplant group
What is the Indiana Network for Patient Care?
Database with >100 separate healthcare entities that provide data such as:
major hospitals, health networks, insurance providers, patient data, clinical observations, encounter records, etc
Which groups of people are more likely to have worse outcomes when started on opioids?
-Males
-Patients with comorbidities
-Patients with mental health problems
What are the predictors for long-term opioid use?
-Older patients
-Female
-Black
-Comorbidities
-Existing substance use disorder
all show increased opioid use duration
What is the rationale behind why pharmacovigilance is important for continued monitoring of drugs?
-Premarketing studies exclude patients with complicated comorbidities
-Premarketing studies only determine efficacy of a drug vs placebo
-Statistical power of a premarketing study is too weak to detect infrequent adverse effects
What does the FDA Adverse Event Reporting System (FAERS) do?
Houses postmarketing adverse event reports received by the FDA
What does the FDA Sentinel System do?
Monitors the safety of FDA regulated products
What is the FDA VARES?
Vaccine adverse event reporting system
What adverse affect was found to be associated with Fluoroquinolone Exposure in the 2013 Pharmacovigilance Review?
Disabling Peripheral Neuropathy
**primarily musculoskeletal and neuropsychiatric
What is efficacy?
Whether a drug has the ability to bring about a given intended effect in controlled settings
What is effectiveness?
Whether, in real-world patients and settings, a treatment, in fact achieves its desired effect
(what happens when we bring the drug to the real world?)
What is pragmatic research?
Studies that often test practical changes that could have a big impact on health outcomes