Table 2. Quality of CC performed by the intervention and control group participants.

	Intervention group (n = 20)	Control group (n = 20)	P-valuea	P-valuea ANCOVA
Proportion of accurate CC depth; %	64.6±7.8	43.1±28.3	0.020	0.049
CC rate; counts/min	115.5±8.2	115.2±12.1	0.915	0.555
CC depth; mm	53.1±4.1	51.1±7.7	0.310	0.927
Proportion of complete chest decompression; %	100.0 (99.3–100.0)	100.0 (99.5–100.0)	0.366	N/A

Values are mean (SD), median [IQR], or number (proportion), and tested by the independent t-test or Mann-Whitney test. ANCOVA included age, sex, and body mass index as covariates. Proportion of accurate CC depth was defined as the ratio of the number of CC whose depth was between 5 and 6 cm to the total compression number for 2 min. Proportion of complete chest decompression was defined as the ratio of the number of CC whose recoil depth was <1 cm to the total decompression number for 2 min.

CC, chest compression; ANCOVA, analysis of covariance, N/A, not applicable

^ap-value <0.05 is significant.