Table 4. Inter-group Comparison Test Statistics (C Versus D)

	Test statisticsa
	Treatment	0.5hr	1hr	2hrs	3hrs	4hrs
Mann-Whitney's U	3.000	9.000	9.000	12.000	10.000	12.500
Wilcoxon's W	18.000	24.000	24.000	27.000	25.000	27.500
Z	-1.984	-0.733	-0.731	-0.104	-0.522	0.000
Asymp.Sig.(2-tailed)	0.047	0.463	0.465	0.917	0.602	1.000
Exact Sig.[2*(1-tailed Sig.)]	0.56b	0.548b	0.548b	1.000b	0.690b	1.000b

C: 1,3-butylene glycol D: Hydrolysate 1000㎍/㎖ in 1,3-butylene glycol
Group variable:specimen
Not corrected for ties