Table 2.

Comparison of the mean heart rate at baseline before laryngoscopy and at one, three, five, and 10 minutes after the intervention in the three groups

Heart rate time (bpm)	Code	Placebo		Group 1		Group 2				Total			P-value
		Mean	SD	Mean	SD	Mean		SD		Mean	SD
Before laryngoscopy	A	88.06	19.30	80.28	11.14	94.76		19.61		87.87	18.05		0.012
One-minute interval	B	91.86	20.03	82.00	16.54	90.56		16.31		88.28	18.06		0.043
Three-minute interval	C	89.80	16.59	97.85	18.89	87.23		15.54		91.48	67.67		0.010
Five-minute interval	D	84.56	17.40	70.75	12.75	78.23		10.66		77.98	14.87		0.004
Ten-minute interval	E	79.06	17.03	67.14	11.68	75.20		11.55		73.95	14.42		0.006
Bonferroni test (repeated measures test)
Comparison phase	Placebo group (P=0.04)			Group 1 (P<0.001)					Group 2 (P=0.264)
	Mean difference		P-value	Mean difference			P-value		Mean difference			P-value
A:B	-3.800		1.000	-1.714			1.000		4.200			1.000
A:C	-1.733		1.000	-17.571			1.000		7.533			0.167
A:D	3.500		1.000	9.536			0.001		16.600			1.000
A:E	9.000		0.309	13.143			1.000		19.567			1.000
B:C	2.067		1.000	-15.857			1.000		3.333			0.752
B:D	7.300		0.325	11.250			1.000		12.400			1.000
B:E	12.800		0.001	14.857			1.000		15.367			1.000
C:D	5.233		0.251	27.107			1.000		9.067			0.002
C:E	10.733		0.001	30.714			1.000		12.033			1.000
D:E	5.500		0.228	3.607			0.103		2.967			0.061