Mechanical versus manual chest compression for out-of-hospital cardiac arrest (PARAMEDIC): a pragmatic, cluster randomised control trial

. 2015 Jun 30;16(3):241–243. doi: 10.1177/1751143715591402

Outcome	Time to outcome	CER	EER	RRR	ARR	NNT
Death	30 days	0.932	0.938	−1%	−0.006	ns
Death	95% Confidence intervals:			−2% to 1%	−0.021 to 0.009	ns
Death	3 months	0.935	0.942	−1%	−0.007	ns
Death	95% Confidence intervals:			−2% to 1%	−0.021 to 0.007	ns
Favourable neurological outcome (CPC 1–2)	3 months	0.060	0.047	22%	0.013	ns
Favourable neurological outcome (CPC 1–2)	95% Confidence intervals:			−1% to 44%	0.000 to 0.026	ns

CER: control event rate; EER: experimental event rate; RRR: relative risk reduction; ARR: absolute risk reduction; NNT: number needed to treat; CPC: cerebral performance category; ns: not significant.