Table 2.

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

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

^†:Comparisons between groups at each measure,

^‡:Comparisons between within-group measures in each group,

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