Internal Validity

Question 1

Describe evidence based medicine

Answer 1

-clinical judgement
-relevant scientific evidence
-patients values and preferences

Question 2

List the steps to provide an evidence-based
answer to a clinical question

Answer 2

1) question arises
2)completely articulate all parts of the question
3) conduct a through focused search and select high quality evidence
4) evaluate the evidence for validity
5) use clinical expertise to integrate applicable evidence with attention to patient’s values

Question 3

Define internal validity

Answer 3

ability to draw causal relationship
between intervention and observed outcomes excluding
other explanations; rigor

Question 4

Describe aspects that DECREASE internal validity

Answer 4

-drop outs/Attrition
-confounding variables
-compromised blinding
-errors

Question 5

External validity

Answer 5

-ability to generalize finding in conditions not studies