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Table 2 Conservative and non conservative breast cancer surgical rates

From: Income level and regional policies, underlying factors associated with unwarranted variations in conservative breast cancer surgery in Spain

  Less than 50 years 50 to 70 years More than 70 years All ages
  CS NCS Total CS NCS Total CS NCS Total CS NCS Total
Cases 11,821 9,646 21,251 23,204 14,676 35,523 9,623 13,745 23,094 44,648 38,067 81,868
Population 47,728,827 19,931,718 13,945,734 81,606,279
Standardized rate 2.40 2.05 4.41 11.13 7.69 18.67 6.81 10.30 16.91 5.29 4.84 10.03
RV 5-95 4.17 2.76 2.45 3.97 2.98 2.32 7.16 2.909 2.50 3.92 2.51 2.05
SCV 0.141 0.042 0.046 0.148 0.108 0.062 0.236 0.122 0.083 0.153 0.080 0.057
Empirical Bayes 0.149 0.064 0.048 0.182 0.101 0.061 0.272 0.091 0.067 0.191 0.078 0.059
  1. 2002-2006 age-sex standardized rates and statistics of variation
  2. CS: Conservative surgery; NCS: Non-conservative Surgery. RV5-95: Represents the range of variation in standardized rates, between the areas in percentiles 95th and 5th, expressed as a ratio. Systematic Component of Variation (SCV)) and Empirical Bayes Statistic (EB) represent the variation considered systematic (thus, beyond chance). Both are estimated using observed and expected cases; the latter obtained by indirect standardization.
  3. EB uses Bayesian modelling and simulation, resulting in a more robust estimate for small numbers [15].