Table 3

Breast Cancer Screening Program (BCSP) enrollment and screening exposure for health-plan study-component-3 women (1995–1998) used to evaluate the odds of late-stage disease

Late stagea (n = 153)Early stagea (n = 445)General GHCb populationc (n = 614)
n%n%n%
BCSP enrollment
 No2013.1245.4345.5
 Yes, no BCSP screening mammogram3422.27316.415825.7
 Yes, at least one BCSP screening mammogram9964.734878.242268.7
P vs. late stage0.0010.005
Screening mammogram within 26 mo prior to index date
 No5636.69521.322035.8
 Yes9763.435078.739464.2
P vs. late stage0.00020.86
Total no. of screening mammograms in 5 yr prior to index date
 04126.85512.414223.1
 12516.39721.814423.5
 2+8756.929365.832853.4
P vs. late stage0.00010.15
No. of BCSP screening mammograms in 5 yr prior to index date
 05435.39721.819231.3
 14126.811425.616026.1
 2+5837.923452.626242.7
P vs. late stage0.0010.52
  • a Late- and early-stage breast cancer diagnosed in 1995–1998.

  • b GHC, Group Health Cooperative.

  • c General GHC population controls frequency-matched to the late-stage cases on age and length of enrollment.