Randomisation techniques Flashcards
1
Q
What is simple randomisation?
A
Simple randomisation is where subjects are assigned to treatment or control groups by chance.
This reduces allocation bias and unknown possible factors
2
Q
What is block randomisation
A
Where subjects are placed into blocks, so there is an equal number of differnet study groups
3
Q
What is stratified randomisation
A
Participant characteristics are balanced in each group
4
Q
What is cluster randomisation
A
When the randomisation is not based on a group of individuals but rather a cluster that pre-exists, e.g. a whole GP practice.
Loss in statistical power and complexity in design and analysis
5
Q
What is adaptive randomisation
A
Randomisation as the study progresses, in response to how people are responding
