Cervical cancer after multiple negative cytologic tests in long-term members of a prepaid health plan.

Objective: To estimate squamous cell cervical cancer incidence within 3.5 years of 1, 2 and > or = 3 consecutive, normal cytologic tests.

Study Design: Data were from a case-control study of cervical cancer screening efficacy.

Screening interval and risk of invasive squamous cell cervical cancer.

To compare the risks of developing invasive squamous cell cervical cancer associated with screening intervals of 1, 2, and 3 years after a negative cervical smear. We conducted a matched case-control study of invasive squamous cell cervical cancer patients (n = 482) diagnosed between 1983 and 1995 among long-term members of a large health maintenance organization. Controls were matched for age, length of membership, and race (n = 934).