. Author manuscript; available in PMC: 2017 Nov 1.

Published in final edited form as: Circ Cardiovasc Qual Outcomes. 2016 Oct 4;9(6):740–748. doi: 10.1161/CIRCOUTCOMES.116.002493

Table 3.

CC rate and depth in the two training cohorts.

	Cohort		Mean Difference
	VO (n=237)	VSI (n=285)	Difference	Adjusted Difference^*
CC Rate (n/min)	87.7 (85.1, 90.4)	89.3 (86.8, 91.8)	−1.6 (−5.2, 2.1)	−1.9 (−5.6, 1.8)
CC Depth (mm)	40.2 (38.7, 41.7)	45.8 (44.5, 47.1)	−5.6 (−7.6, −3.7)	−5.2 (−7.4, −3.1)

Values shown are means.

Inverse probability weighting propensity score adjusted with all of the demographic variables in Table 1. CC, chest compressions; VO, video-only; VSI, video self-instruction; Rate: Mean and 90% confidence interval; Depth: Mean and 95% confidence interval. Significance for both is established at the 5% significance threshold.