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# Declaration

I am not in active clinical practice of treating patients! 'drlamtung' here is only a title!

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Level of evidence

July 23, 2018

Level of evidence determines the current clinical practice:

 

1a: systemic reviews of randomised controlled trials

1b: individual randomised controlled trial with narrow confidence interval

1c: all or none randomised controlled trial

2a: cohort studies

2b: individual cohort study or low quality randomised controlled trial

2c: "outcomes" research, ecological studies

3a: case-control studies

3b: individual case-control study

4: case series

5: expert opinion

 

In the past, we rely on expert opinion on the courts but it is biased. Nowadays, the gold standard of evidence is randomised controlled trial. 

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