Table 3.

Multiple comparison test for the control (non-surface treated) samples with other surface-treated samples using ANOVA with Sidak's test.

Group comparison		Paired differences					P value
		Mean difference	Std. deviation	Std. error mean	95% confidence interval for difference
					Upper	Lower
Control light	Mon + light	−2.57	2.61	1.06	−5.32	0.17	0.06
	Acet + light	0.00	3.41	1.39	−3.58	3.58	1.00
	Eth + light	0.06	1.80	0.73	−1.82	1.95	0.93
	Iso + light	0.61	0.99	0.40	−0.42	1.65	0.19
Control microwave (micro)	Mon + micro	−1.63	10.94	4.46	−13.11	9.85	0.73
	Acet + micro	3.83	4.57	1.86	−0.95	8.63	0.09
	Eth + micro	2.62	2.53	1.03	−0.02	5.28	0.05∗
	Iso + micro	1.91	4.56	1.86	−2.87	6.69	0.35
Control Ivomate (Ivo)	Mon + Ivo	−1.77	3.44	1.40	−5.39	1.84	0.26
	Acet + Ivo	1.91	1.70	0.69	0.11	3.70	0.04∗
	Eth + Ivo	1.27	2.60	1.06	−1.46	4.01	0.28
	Iso + Ivo	0.63	5.53	2.25	−5.17	6.44	0.78

Significant difference between groups at P < 0.05.