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2.6. Statistical methods

SL Sanghun Lee
KA Ki Ok Ahn
MC Myeong-il Cha
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We transformed the treatment effects to log ORs with 95% CIs, and we combined them for each outcome using a random-effects model. We assessed heterogeneity using Cochran Q test based on the corresponding I2, with I2 > 50%, indicating significant heterogeneity.[20] We conducted meta-analyses to compare the rate of bystander CPR and the rate of survival between low and high SES groups.

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