Table 2.

Distribution characteristics of raw and numerically transformed salivary alpha-amylase values

	Raw sAA	Transformed sAA
	(U/mL)	Square root (sqrt [U/mL])	Natural log (ln[U/mL])
n	430	430	430
Mean	17.48	3.96	2.65
Median	13.00	3.60	2.55
Standard deviation	11.70	1.21	0.57
Coefficient of variation (%)	66.94	30.56	21.51
Skewness	1.79	1.11	0.31
Kurtosis	3.27	1.01	0.16
Fifth percentile	6.50	2.48	1.79
95th percentile	43.75	6.06	3.71