Flashcards in Observational Studies Deck (11):
collects data from a group of people to asses the frequency of a disease and its related risk factors at a certain period of time
"What is happening"
Cross sectional study
cross sectional study measures
compares a group with a disease to one without a disease and looks for any PRIOR risk factors
" What happened?
compares a group with a given risk factor to a group without a risk factor and sees if the exposure will causes disease later
can be prospective or retrospective
"Who will develop"
"Who did develop"
experiment that involves humans that compares the therapeutic benefits od 2 or more treatments or of a treatment and a PLACEBO
small number of healthy volunteers
" Is it safe?" asses the saftey, toxicity, pharmockinetisc and pharmacodynamics
small number of people with the disease of interest
" Does it work"
do the treatment actually work and are there adverse effects
large number of patients randomly assigned to a group
" Is it good or is it better?"
compares new treatment to current treatment standard
postmarketting of drug surveillance
" Can it stay?"
what are the long term adverse effects
1-false negative =