ismailalmokyad's version from 2015-05-30 00:10


Question Answer
Compares a group of people with a disease to a group without.Case Control
Compares a group with a given risk factor to a group withoutCohort
Collects data from a group of people to assess FREQUENCY of disease (and related risk factors) at a particular point in time.Cross-Sectional
Pools data from several studies to come to an overall conclusion.Meta-analysis
nonrandom assignment to study groupSelection bias
knowledge of presence of disorder alters recall by subjectsRecall bias
subjects are not representative relative to general pop; therefore, results are not generalizableSampling bias
information gathered at an inappropriate timeLate-look bias
subjects in different groups are not treated the same ○ E.g. more attention is paid to treatment group, stimulating greater complianceProcedure bias
early detection confused with increased life expectancyLead time bias
occurs with 2 closely associated factors ○ The effect of the 1 factor distorts or confuses the effect of the otherConfounding bias
occurs when a researcher’s belief in the efficacy of the treatment changes the outcome of that treatmentPygmalion effect
occurs when the group being studied changes its behavior to meet the expectations of the researcherHawthorne effect
mean >median>modePositive skew, Asymmetry with tail on right
mean< median < modeNegative skew • Asymmetry with tail on left
t-testchecks difference between the MEANS of 2 groups • Mr. T is MEAN
ANOVAANOVA checks difference between the means of 3 or more groups
Reportable diseases• AIDS • Gonorrhea •Syphilis • TB • Measles • Mumps • Rubella • Chickenpox • Hepatitis A and B • Salmonella • Shigella

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