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Odds Ratio; Im stuck!

2K views 2 replies 2 participants last post by  juanlink 
#1 ·
For patients with ambulance response intervals of longer than 5 minutes, more patients achieved Return Of Spontaneous Circulation in the CPR first group (58% [37/64]) compared with the standard De-fibrillation first group (38% [21/55])
Whats the OR?

I can't figure out the steps to solve this question:confused: :toosad: :plz: :(

Answer= OR 2.22
 
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