Exploration of Medicine

From: Combined effect of topical sulfasalazine for oral lichen planus management: a randomized clinical trial

Table 3

Pain scale comparisons between and within groups

Interval	Measurement	Control	Test	Test statistic	p-value
Baseline	Mean ± SD	8.70 ± 0.70^A	8.70 ± 0.70^A	264.50	0.980^ns
Baseline	Median (IQR)	9.00 (1.00)^A	9.00 (1.00)^A	264.50	0.980^ns
1 week	Mean ± SD	6.74 ± 0.96^B	6.57 ± 0.79^B	286.50	0.612^ns
1 week	Median (IQR)	7.00 (1.00)^B	6.00 (1.00)^B	286.50	0.612^ns
2 weeks	Mean ± SD	5.04 ± 0.98^C	4.52 ± 0.73^C	348.50	0.052^ns
2 weeks	Median (IQR)	5.00 (2.00)^C	4.00 (1.00)^C	348.50	0.052^ns
3 weeks	Mean ± SD	3.39 ± 1.03^D	2.26 ± 0.62^D	424.50	< 0.001*
3 weeks	Median (IQR)	3.00 (1.00)^D	2.00 (1.00)^D	424.50	< 0.001*
4 weeks	Mean ± SD	1.78 ± 0.90^E	0.57 ± 0.59^E	449.50	< 0.001*
4 weeks	Median (IQR)	2.00 (1.50)^E	1.00 (1.00)^E	449.50	< 0.001*
Test statistic		91.05	91.81
p-value		< 0.001*	< 0.001*

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SD: standard deviation; IQR: interquartile range; ns: non-significant; * significant (p < 0.05). Significant differences exist between ‎values in the same vertical column that have dissimilar superscripts. Mean values having ‎the same superscript letter are not significantly different