[Studies on the prevalence and incidence rate of epithelial neoplasia of the uterine cervix by mass survey using mobile units].

In this paper, we analyzed the results obtained in a mass survey using mobile units. The survey covered 276,846 women of whrom 78,018 (24.6%) were women who were being screened for the first time and the other 208,828 had been screened previously. 1) The total detection rate was 0.04% for invasive cancer, 0.03% for carcinoma in situ and 0.06% for severe dysplasia of the uterine cervix. The prevalence rate for 1,000 women was calculated as 0.40, 0.30 and 0.63 respectively. 2) The detection rate for invasive cancer, carcinoma in situ and severe dysplasia was 0.08%, 0.07% and 0.08% respectively for women who were being screened for the first time and 0.03%, 0.02% and 0.06% respectively for repeats. Through the latter results, the incidence rate for 100,000 women was calculated as 30 for invasive cancer, 20 for carcinoma in situ and 60 for severe dysplasia. 3) The detection rate for invasive cancer and severe dysplasia increased abruptly above 60 years and that for carcinoma in situ at 65 years old and over. 4) The detection rate for invasive cancer, carcinoma in situ and severe dysplasia in previously screened women showed little fluctuation by age group.