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Table 3 Hazards ratios from Cox regression models with 95% confidence interval and corresponding P values, of breast cancer survival comparing post-program group with pre-program group

From: Improved breast cancer survival following introduction of an organized mammography screening program among both screened and unscreened women: a population-based cohort study

  Univariable Multivariable
Category HR 95% CI P value HR* 95% CI P value
Pre-program 1.00 ref   1.00 Ref  
Post-program 0.83 0.77 to 0.88 <0.001 0.86 0.78 to 0.95 0.003
Age-categorized (years)       
0 to 39     1.00 ref  
40 to 49     0.60 0.53 to 0.67 <0.001
50 to 69     0.73 0.66 to 0.81 <0.001
≥ 70     0.98 0.89 to 1.08 0.75
Surgery performed#     0.17 0.16 to 0.19 <0.001
Chemotherapy given#     0.97 0.96 to 0.98 <0.001
Hormone therapy given#     1.03 1.01 to 1.04 <0.001
Radiation given#     1.00 0.99 to 1.02 0.63
  1. *Adjusted for county of residence and calendar year of diagnosis.
  2. # Reference categories: surgery not performed; chemotherapy not given; hormone therapy not given; radiation not given, respectively.
  3. CI = confidence interval; HR = hazard ratio.