Base-Line Characteristics
The distribution of prognostic variables and other
characteristics in the screening and usual-care groups
at base line is shown in Table 1. The two groups were
very similar in terms of the variables used to evaluate
risk status and in their educational level, annual income,
and history of Pap tests.
A total of 645 (64 percent) of the women in the
screening group were tested for cervical chlamydial infection;
44 (7 percent) had positive tests. All 44 women
with positive results received treatment for chlamydial
infection from their primary care providers. The 645
women in the screening group who underwent testing
were similar in terms of the prognostic variables to the
364 who were not tested (data not shown).