Treatment with Light-Emitting Diodes of Wavelength 863 nm Delays DMBA/TPA-Induced Skin Tumor Formation and Decreases Proinflammatory Cytokine Levels in ICR Mice

Table 2

Statistical analysis of comparison among time points in the average number of tumors per mouse (group I: control; group II: acetone; group III: DMBA; group IV: DMBA+TPA; group V: DMBA+TPA+850 nm LED; KW¹⁾: Kruskal-Wallis statistic).

Week	Group IV			Group V
	value	KW^1)	Dunn’s multiple comparison test	value	KW^1)	Dunn’s multiple comparison test
1 vs. 2	<0.0001	126	ns	<0.0001	90.9	ns
1 vs. 3			ns			ns
1 vs. 4			ns			ns
1 vs. 5			ns			ns
1 vs. 6			ns			ns
1 vs. 7			ns			ns
1 vs. 8			ns			ns
1 vs. 9			ns			ns
1 vs. 10			ns			ns
1 vs. 11			ns			ns
1 vs. 12			ns			ns
1 vs. 13			ns			ns
1 vs. 14			ns			ns
1 vs. 15			ns			ns
1 vs. 16			ns			ns
1 vs. 17			ns			ns
1 vs. 18			#			ns
1 vs. 19			###
1 vs. 20			####