BMC Oral Health

Table 3 Descriptive statistics and results of Friedman’s test for the changes in hypersensitivity (VAS) scores within each group

From: Impact of repeated preheating of bulk-fill resin composite on postoperative hypersensitivity; a randomized controlled clinical trial

Time	Group I (n = 35)		Group II (n = 35)		Group III (n = 35)
Time	Median (range)	Mean (SD)	Median (range)	Mean (SD)	Median (range)	Mean (SD)
1 day	0 (0–3)	0.64 (1.15) ^A	0 (0–3)	0.43 (1.09)	0 (0–2)	0.14 (0.53)
1 week	0 (0–1)	0.14 (0.36) ^B	0 (0–0)	0 (0)	0 (0–0)	0 (0)
1 month	0 (0–0)	0 (0) ^B	0 (0–0)	0 (0)	0 (0–0)	0 (0)
P value	0.024*		0.135		0.368
Effect size (w)	0.265		0.143		0.071

*: Significant at P ≤ 0.05, Different superscripts in the same column indicate statistically significant change by time

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