Stroke 3 - RCT/SR

Question 1

What type of study is a randomised control trial?

Answer 1

Experimental

Question 2

Name two important methods of avoiding selection bias in RCT

Answer 2

1. Random assignment of intervention and control treatments
2. Allocations concealment
3. Efforts to minimise loss to follow-up

Question 3

How to reduce information bias in RCT?

Answer 3

Blinding - people who collect the information and analyse the infromation
Standardised procedures for collecting/measuring outcomes

Question 4

What is the difference between internal and external validity?

Answer 4

Internal = valid estimate of treat effect in THIS sample
External = generalisability to a wider population group