EBMII Study Designs

Question 1

Observational

Answer 1

examines conditions/events that already occurred or will anyway

Question 2

experimental

Answer 2

conditions under direct control of investigator

Question 3

cross-sectional study

Answer 3

data are collected on the whole study population at a single point in time to examine the relationship between disease (or other health related state) and other variables of interest

Question 4

ecologic studies

Answer 4

populations or group study using pre-existic data; census

Question 5

case control

Answer 5

observational study- start with disease and look backwards in time

Question 6

cohort study

Answer 6

select subjects based on exposure and are disease free at baseline- follow up and see who gets the disease

Question 7

experimental

Answer 7

designed to assess efficacy of treatment or intevention

compare outcomes in patients with therapy and without

Question 8

RCT

Answer 8

randomized controlled clinical trials;
measure outcomes of two or more clinical interventions
randomization

Question 9

meta-analysis

Answer 9

numerically combine results from multiple studies

Question 10

systemic reviews

Answer 10

review scientific literature