Skip to main content

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