Table 1.

Relation of regular mammography use (use during all three 2-year follow-up periods) to socioeconomic factors among 14,706 BWHS participants

FactorNo.*Regular mammography use (%)OR (95% CI)OR (95% CI)
Health insurance
    Yes13,93781.54.00 (3.38-4.73)3.59 (3.02-4.28)
    No71648.0RefRef
Household income (in U.S. $)
    <15,00171667.7not includedRef
    15,001-25,0001,08576.11.29 (1.02-1.64)
    25,001-50,0004,03579.81.61 (1.31-1.98)
    50,001-100,0004,95981.91.78 (1.44-2.19)
    >100,0002,10283.22.00 (1.58-2.53)
Years of education
    <1234774.4RefRef
    122,42479.31.03 (0.76-1.41)0.95 (0.70-1.29)
    13-154,74778.50.96 (0.71-1.30)0.85 (0.63-1.15)
    ≥167,08581.20.99 (90.73-1.33)0.82 (0.61-1.11)
Neighborhood SES (quartile)
    1 (lowest)3,68376.3Ref
    23,66979.51.10 (0.98-1.24)1.05 (0.94-1.19)
    33,67880.71.11 (0.98-1.25)1.05 (0.92-1.18)
    43,67683.01.25 (1.10-1.42)1.15 (1.00-1.31)
  • * Women with missing values for a particular factor were excluded.

  • Odds ratio and 95% CI for regular mammography use relative to nonregular use with control for all socioeconomic and individual factors except household income.

  • Odds ratio and 95% CI for regular mammography use relative to nonregular use with control for all socioeconomic factors and individual factors, including household income.