Clinical performance of nano-hydroxyapatite-modified glass ionomer cements in class V cavities: split mouth, randomized controlled trial

Bulletin of the National Research Centre

Table 7 Fisher’s exact test results and descriptive statistics for comparison between surface staining in the four groups

Time	GIC (n = 15)		Nano-HA GIC (n = 15)		RMGIC (n = 15)		Nano-HA RMGIC (n = 15)		P-value	Effect size (v)
Time	N	%	N	%	N	%	N	%	P-value	Effect size (v)
Base line									NC^†
Alpha	15	100	15	100	15	100	15	100
3 months									NC^†
Alpha	15	100	15	100	15	100	15	100
6 months									0.997	0.084
Alpha	13	86.7	14	93.3	14	93.3	13	86.7
Bravo	1	6.7	0	0	0	0	1	6.7
Drop out	1	6.7	1	6.7	1	6.7	1	6.7
9 months									0.992	0.085
Alpha	13	86.7	12	80	14	93.3	13	86.7
Bravo	1	6.7	2	13.3	0	0	1	6.7
Drop out	1	6.7	1	6.7	1	6.7	1	6.7
P-value	0.112		0.066		0.392		0.112
Effect size (v)	0.133		0.160		0.067		0.133