Table 5.

Summary table including the sample size for each arm of the study depending on the mean Modified Gingival Index (MGI) change and SD.

Nominal power	Mean MGI change	SDa
		0.20	0.21	0.22	0.23	0.24
0.9	0.10	70	77	84	92	100
0.9	0.15	32	35	38	41	45
0.9	0.20	18	20	22	24	26

^aExpected sample size is the same per each group and it is indicated by the rows (ie, 70-100, 32-45, and 18-26) according to the SD and MGI combinations.