Non-cancer cells (n=100) Cancer cells(n=200) P-value Wavelength (nm) Transmittance (mean±SD%) 530 49.3 ± 10.3 29.9 ± 7.1   < 0.001* 580 51.5 ± 9.3 27.4 ± 6.7 640 33.3 ± 8.6 12.8 ± 4.7         Correction Division value (mean±SD%)   < 0.001* 530/580 ratio 95.2 ± 4.2 109.1 ± 6.5 630/580 ratio 64.2 ± 8.6 45.7 ± 7.7 *Mann-Whitney U test

Table 2: Comparison of the transmittance measured using the Vis-MS and the division of 560 nm values between non-cancer and cancer cells.