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Table 4 Standardized Mortality Ratios (SMR) and Standardized Incidence Ratios (SIR) by deprivation (IMD) quintile.

From: Impact on mortality and cancer incidence rates of using random invitation from population registers for recruitment to trials

Mortality by deprivation Number Expected Mortality Observed Mortality SMR L95%CI U95%CI
IMD SCORE (deprivation index)       
1st quintile (up to 7.8) 31231 1985 604 30.4% 28.0% 33.0%
2nd quintile (7.8-12.3) 31203 1912 591 30.9% 28.5% 33.5%
3rd quintile (12.3-18.5) 31254 1884 721 38.3% 35.5% 41.2%
4th quintile (18.5-30.2) 31326 1901 707 37.2% 34.5% 40.0%
5th quintile (over 30.2) 31263 1959 1024 52.3% 49.1% 55.6%
Cancer incidence by deprivation Number Expected Incidence Observed Incidence SIR L95%CI U95%CI
IMD SCORE (deprivation index)       
1st quintile (up to 7.8) 31231 736 593 80.6% 74.2% 87.4%
2nd quintile (7.8-12.3) 31203 715 590 82.6% 76.0% 89.5%
3rd quintile (12.3-18.5) 31254 705 601 85.2% 78.5% 92.3%
4th quintile (18.5-30.2) 31326 725 589 81.3% 74.9% 88.1%
5th quintile (over 30.2) 31263 786 715 91.0% 84.4% 97.9%
  1. Average time on trial = 5.55 yrs/woman for SMRs and = 2.58 yrs/woman for SIRs