Table 1.

Results of the five measurements in the three experimental conditions

	Telephone-instructed CPR ($n=$ 17)	Video-instructed CPR ($n=$ 14)	Video-instructed CPR with filming protocol ($n=$ 18)
Depth of compressions	26.00 [mm]	25.00 [mm] $p=$ 0.28 compared with t-CPR	26.00 [mm] $p=$ 0.37 compared with t-CPR
			$p=$ 0.92 compared with v-CPR
Rhythm	103.00 [BPM]	100.00 [BPM] $p=$ 0.95 compared with t-CPR	107.50 [BPM] $p=$ 0.25 compared with t-CPR
			$p=$ 0.16 compared with v-CPR
Hands placed correctly in the centre of patient’s chest	62.94%	71.36% $p<$ 0.05 compared with t-CPR*	73.17% $p<$ 0.05 compared with t-CPR*
			$p=$ 0.20 compared with v-CPR
Percentage of time chest compressions were done with correct rhythm	54.18%	47.29% $p<$ 0.05 compared with t-CPR*	53.61% $p=$ 0.70 compared with t-CPR
			$p<$ 0.05 compared with v-CPR*
Full release of the chest after each compression	74.65%	61% $p<$ 0.05 compared with t-CPR*	81.56% $p=$ 0.43 compared with t-CPR
			$p<$ 0.05 compared with v-CPR*

Values are presented as percentages or quantitatively. Percentages were compared using a test. Quantitative variables were compared using a Mann-Whitney U test. Significant differences are marked with *.