Table 1. The basic information of the participants recruited at the different years in the study.

Variable	Total	HPV (+)	HPV (-)	P
Age, years, median (interquartile range)
2014	43 (35–56)	46 (36–55)	43 (35–56)	0.380
2015	50 (38–64)	52 (39–63)	50 (38–64)	0.869
2016	45 (36–58)	45 (36–56)	45 (36–58)	0.351
2017	46 (36–60)	45 (35–56)	46 (36–60)	0.092
2018	44 (36–57)	45 (37–58)	43 (36–57)	0.330