COMLEX Level 2 biostats + ethics Questions And Verified Solutions
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Course
COMLEX
Institution
COMLEX
Bias introduced into a study when a clinician is aware of the patient's treatment type. - Correct Answer Observational bias
Bias introduced when screening detects a diseae earlier and thus lengthens the time from diagnosis to death. - Correct Answer Lead-time bias
If you want to know if g...
COMLEX Level 2 biostats + ethics Questions And Verified
Solutions
Bias introduced into a study when a clinician is aware of the patient's treatment type. - Correct Answer
Observational bias
Bias introduced when screening detects a diseae earlier and thus lengthens the time from diagnosis to
death. - Correct Answer Lead-time bias
If you want to know if geographical location affects infant mortality rate but most variation in infant
mortality is predicted by socioeconomic status, then socioeconomic status is a _____. - Correct Answer
Confounding variable/factor
The proportion of people who have the disease and test positive is known as the ___. - Correct Answer
sensitivity
Sensitive tests have few false negatives and are used to rule ___ a disease. - Correct Answer Out (i.e.
PPD test)
Chronic diseases such as SLE. Higher prevalence or incidence? - Correct Answer Higher prevalence
Epidemics such as influenza. Higher prevalence or incidence? - Correct Answer Higher incidence
Incidence or prevalence: Cross-sectional study. - Correct Answer Prevalence
Incidence or prevalence: Cohort study. - Correct Answer Incidence and prevalence
Incidence or prevalence: Case-control study. - Correct Answer Neither.
A test that consistently gives identical wrong results is ___ reliability/precision and ___ validity/accuracy.
- Correct Answer high, low
, An ___ ratio is an estimate of relative risk when the disease prevalence is low. - Correct Answer Odds
What is the difference in risk in the exposed and unexposed groups called? - Correct Answer
Attributable risk
The most common cancer in men is ___. - Correct Answer prostate cancer
Most common cause of cancer death in men is ___. - Correct Answer lung cancer
What is the percentage of cases within 1, 2, and 3 standard deviations of the mean? - Correct Answer
68%; 95.4%; 99.7%
Birth rate is number of live births per ___ in 1 year. - Correct Answer 1000
Death rate is number of deaths per ___ in 1 year. - Correct Answer 1000
Neonatal mortality rate is the number of deaths from births to ___ days per 1000 live births in 1 year. -
Correct Answer 28
Infants mortality rate is the number of deaths from births to ___ year per 1000 live births in 1 year. -
Correct Answer 1
Maternal mortality rate is the number of deaths during pregnancy to ___ days postpartum per 100,000
live births in 1 year. - Correct Answer 42
True or False: Once patients sign a statement giving consent, they must continue treatment. - Correct
Answer False, patients may change their minds at any time (exceptions to the requirment of informed
consent include emergency situations and patients without decision-making capacity)
A 15 year old pregnant girl requires hospitalization for preeclampsia. Is parental consent required? -
Correct Answer No, parental consent is not necessary for the medical treatment of pregnant minors
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