Participant flow

Screening for Ovarian Cancer in Older Patients (PLCO Screening Trial) · Source last updated 2026-07-24

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

groups

1. description

   Participants receive standard medical care.

   id

   FG000

   title

   Control

2. description

   Participants undergo blood sample collection for CA-125 analysis at baseline annually for 5 years. Participants also undergo an OVR (discontinued in December 1998) and TVU at baseline and annually for 3 years.

   id

   FG001

   title

   Ovarian Screening

periods

1. drop Withdraws

   1. reasons

      1. group Id

         FG000

         num Subjects

         0

      2. group Id

         FG001

         num Subjects

         2

      type

      Cancer Before Rand. (Ovarian Screening)

   2. reasons

      1. group Id

         FG000

         num Subjects

         1

      2. group Id

         FG001

         num Subjects

         2

      type

      Died Before Randomization

   3. reasons

      1. group Id

         FG000

         num Subjects

         73

      2. group Id

         FG001

         num Subjects

         0

      type

      Died Before ASU (Control)

   4. reasons

      1. group Id

         FG000

         num Subjects

         4807

      2. group Id

         FG001

         num Subjects

         4851

      type

      No Ovaries at Baseline

   5. reasons

      1. group Id

         FG000

         num Subjects

         311

      2. group Id

         FG001

         num Subjects

         0

      type

      Refused ASU (Control)

   6. reasons

      1. group Id

         FG000

         num Subjects

         0

      2. group Id

         FG001

         num Subjects

         3582

      type

      Refused Screen (Ovarian Screening)

   milestones

   1. achievements

      1. group Id

         FG000

         num Subjects

         39111

      2. group Id

         FG001

         num Subjects

         39105

      type

      STARTED

   2. achievements

      1. group Id

         FG000

         num Subjects

         33919

      2. group Id

         FG001

         num Subjects

         30668

      type

      COMPLETED

   3. achievements

      1. group Id

         FG000

         num Subjects

         5192

      2. group Id

         FG001

         num Subjects

         8437

      type

      NOT COMPLETED

   title

   Overall Study

pre Assignment Details

Participants signed a study informed consent prior to being randomized to a study arm.

recruitment Details

Participants were enrolled between November 1993 and July 2001 at 10 study centers.

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Preserved source evidence · Not medical advice