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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Resuscitation. 2015 Apr 25;93:150–157. doi: 10.1016/j.resuscitation.2015.04.010

Figure 3.

Figure 3

Averages for chest compression fraction (CCF), CC rate, and CC depth over calendar year. Error bars represent standard error of the mean. Wald test of trend: *p=<0.001; †p=0.09; ‡p=0.03.