RIPK4 and chronic cervicitis: Based on the cutoff value (≥50% of positive cells), positive RIPK4 expression was only observed in 2 cases of chronic cervicitis, and the rate of positive RIPK4 expression was 19.3%, 85.1% and 94.4% for LSIL, HSIL and CSCC, respectively, thereby demonstrating an increase with disease progression (Table 2, P < 0.001).