TABLE 4. Fisher's exact test for the comparison of dentist's and subjects' perception of tooth staining.

			Dentist's perception of tooth staining		Total
			yes	no
Subjects' perception of tooth staining	yes	n	6		6
		% perceived	100%		100%
	no	n	10	19	29
		% perceived	34.5%	65.5%	100%
Total		n	16	19	35
		% perceived	45.7%	54.3%	100%