Table 1. Baseline Characteristics of Patients Past Due for Mammography Screening By Intervention Group
CharacteristicsInterventionP Value
Group 1 (Letter) (n = 90)Group 2 (Automated Phone Call) (n = 88)Group 3 (Letter and Automated Phone Call) (n = 93)
Age (years).5095
    50–5957.8 (52)59.1 (52)65.6 (61)
    ≥6042.2 (38)40.9 (36)34.4 (32)
Race/ethnicity.9718
    Non-Hispanic white77.9 (67)79.8 (67)76.3 (71)
    Non-Hispanic black11.6 (10)9.5 (8)12.9 (12)
    Other (eg, Hispanic)10.5 (9)10.7 (9)10.8 (10)
Household income.8252
    ≥$40,00048.9 (44)52.3 (46)52.7 (49)
    $30,000-$39,99926.7 (24)28.4 (25)22.6 (21)
    <$30,00024.4 (22)19.3 (17)24.7 (23)
Insurance*.0034
    Private48.9 (44)51.1 (45)69.9 (65)
    Medicare38.9 (35)26.1 (23)19.4 (18)
    Medicaid12.2 (11)22.7 (20)10.7 (10)
Preintervention screening rates*0 (0)0 (0)0 (0)NA
  • Data are % (n). Small discrepancies between the total number of patients in a group and the summed numbers in the columns reflect data missing for that variable.

  • * By design, patients without insurance or who were up to date on breast cancer and colorectal cancer screening were excluded from the study.

  • NA, not applicable.