Table 2

- Comparisons of the pain evaluations at 0, 2, and 4 hours.

Variables	Groups				Test statistics^{^†}
	Control		Intervention		Test statistics^{^†}
	M	IQR	M	IQR	z	P-value
VAS
0 hour	2.0^a	2.0	3.0^a	1.0	2.285	0.022
2 hours	5.0^b	2.0	1.0^b	1.0	7.759	<0.001
4 hours	7.0^c	2.0	1.0^b	2.0	8.663	<0.001
Test statistics^{^‡}	χ²=105.507; p<0.001		χ²=58.468; p<0.001

M: Median, IQR: interqurtile rate, distance between quartiles, superscripts a, b, and c show the difference between measures in each group. Measurements with the same letters are statistically similar. z: Mann-Whitney U test, χ²: Friedman analysis

↵†: Comparisons between groups at each measure,
↵‡: Comparisons between within-group measures in each group,