Table 1. Comparison of riboflavin levels in plasma from CSCC patients, CIN patients, and control subjects, and in tissues of CSCC and normal cervical epithelia.

groups	riboflavin level in plasma (means ± SD ug/L)	P	riboflavin level in tissues (means ± SD ug/L)	P
Normal	310.01±90.15	0.034	20.12±4.61	0.002
CIN	294.62±88.36
CSCC	254.62±98.36		15.12±3.72
≤IIa	277.25±34.56	0.012	16.45±3.01	0.039
≥IIb	182.01±89.43		14.23±2.92

Student’s t-test was used to Comparison of riboflavin levels in plasma from CSCC patients, CIN patients, and control subjects, and in tissues of CSCC and normal cervical epithelia.