Table 1.

Mean and standard error of the coefficient of variation (cell standard deviation/cell mean) of the redox ratio obtained from multiphoton redox images, in calibrated units

Tissue	Redox ratio coefficient of variation
Normal	0.92 ± 0.08
Low-grade	1.47 ± 0.09*
High-grade	1.40 ± 0.04*

Values were averaged for all cells within an animal for normal (n = 6), low-grade precancerous (n = 8), and high-grade precancerous animals (n = 7). Significant differences (P < 0.05) exist between normal vs. low-grade precancer and normal vs. high-grade precancer (*). There were no significant differences between low- and high-grade precancers (P > 0.05).