Table 2.

Effect of charging during compressions on pause times and inappropriate shocks

	All [n=562]	Pause to Charge [n=217]	Charging During Compressions [n=345]	p value
Compression depth prior to shock†, mean (SD), mm	47.3 (10.3)	47.1 (10.6)	47.3 (10.0)	0.81
Compression rate prior to shock†, mean (SD), /min	108 (11)	106 (12)	109 (11)	0.002
Pre-shock pause, median (IQR), s	3.8 (2.2–10.0)	13.3 (8.6–19.5)	2.6 (1.9–3.8)	<0.001*
Post-shock pause, median (IQR), s	2.0 (1.4–3.0)	2.3 (1.7–3.9)	1.9 (1.3–2.7)	0.01*
Hands-off time 30s preceding shock, median (IQR), s	11.7 (8.1–16.3)	14.8 (11–19.6)	10.3 (6.4–13.8)	<0.001*
Inappropriate shocks‡, n/total (%)	112/560 (20.0)	43/216 (20.0)	69/344 (20.1)	0.97
Shocks to rescuers, n/total (%)	1/562 (0.2)	0/217 (0.0)	1/345 (0.3)	0.43

IQR, interquartile range

^*Adjusted for individual resuscitation, hospital, cardiac arrest location, time of day, shock number, and presence of a shockable rhythm.

^†There was no compression data prior to shock in 17 pause-to-charge cases. Compression depth could not be analyzed in two additional cases, and compression rate could not be analyzed in one additional case.

^‡Rhythm could not be analyzed prior to shock in two cases.