(The following questions were preceded by two survey screener questions—the first on primary specialty, the second on divided clinical time—and information about this survey).

* 1. Which of the following prove that a cancer screening test "saves lives" from cancer?

  Proves screening saves lives Does not prove screening saves lives Don't know
Screen-detected cancers have better 5-year survival rates than cancers detected because of symptoms.
More cancers are detected in screened populations than in unscreened populations.
Mortality rates are lower among screened persons than unscreened persons in a randomized trial.