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Purpose: This randomized, controlled trial was designed to determine whether the DNA cytometry testing is superior to the conventional cytologic testing for mass cervical cancer screening.

Experimental Design: After approval by the institutional ethics review boards from three separate screening centers, a total of 23,993 Chinese women ages 20 to 65 years were randomly assigned into one of the two groups: a DNA cytometry testing group (11,999 women) and a cytologic testing group (11,994 women). Each woman underwent the other testing after first attending the assigned screening test. Women with positive results after assigned testing additionally underwent colposcopy and human papillomaviruses detections, and those with cervical precancerous or cancerous lesions received appropriate treatment. Sensitivity and specificity estimates were adjusted for verification bias. Analyses were …