Exploration of Medicine

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

Table 2

Sign score comparisons between and within groups

Interval	Measurement	Control	Test	Test statistic	p-value
Baseline	Mean ± SD	4.52 ± 0.67^A	4.52 ± 0.67^A	264.50	0.970^ns
Baseline	Median (IQR)	5.00 (1.00)^A	5.00 (1.00)^A	264.50	0.970^ns
1 week	Mean ± SD	3.91 ± 0.85^B	3.87 ± 0.81^B	271.50	0.879^ns
1 week	Median (IQR)	4.00 (2.00)^B	4.00 (1.50)^B	271.50	0.879^ns
2 weeks	Mean ± SD	3.43 ± 0.79^C	3.22 ± 0.80^C	307.00	0.311^ns
2 weeks	Median (IQR)	4.00 (1.00)^C	3.00 (1.00)^C	307.00	0.311^ns
3 weeks	Mean ± SD	3.39 ± 0.84^C	2.26 ± 0.75^D	436.50	< 0.001*
3 weeks	Median (IQR)	4.00 (1.00)^C	2.00 (1.00)^D	436.50	< 0.001*
4 weeks	Mean ± SD	3.09 ± 1.04^C	1.17 ± 0.58^E	487.00	< 0.001*
4 weeks	Median (IQR)	3.00 (2.00)^C	1.00 (0.50)^E	487.00	< 0.001*
Test statistic		71.30	88.39
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