Objective: To assess the implication of health-oriented behavior and state
of health variables estimated to influence women's participation in a breas
t cancer screening program. Methods: A sample of 512 participants and 196 n
onparticipants was taken from a total of 60,908 women between 45 and 65 yea
rs of age. Results: There are significant differences in women's perception
of their knowledge of breast cancer, estimated prognosis, and reasons for
not performing self-examination.The nonparticipant group reports more healt
h problems. Conclusion: The study assesses the relative contribution of the
se variables to participation levels, although further empirical testing of
all these issues is recommended.