Table 1

Characteristics of the study population

CharacteristicTotalDied within 30 days of surgery
OverallMultilevel
n%%(95% CI)
Age
 ≤5095521121.21.2(1.0 to 1.4)
 51–6022 4364382.01.9(1.7 to 2.2)
 61–7043 69516693.83.9(3.5 to 4.2)
 71–8057 37343447.67.6(7.1 to 8.0)
 >8027 864414115.015.0(14.1 to 15.9)
Sex
 Male88 78960376.86.8(6.4 to 7.3)
 Female72 13146676.56.5(6.1 to 6.9)
Year of diagnosis
 199818 01812316.86.9(6.3 to 7.5)
 199918 07612767.17.1(6.5 to 7.7)
 200018 07512496.96.9(6.4 to 7.5)
 200117 29611956.96.9(6.4 to 7.5)
 200217 33612137.07.0(6.5 to 7.5)
 200317 49811556.66.6(6.0 to 7.1)
 200417 86912306.96.9(6.4 to 7.4)
 200518 42110865.96.0(5.5 to 6.4)
 200618 33110695.85.9(5.4 to 6.4)
Cancer site
 Colon104 02379337.67.7(7.3 to 8.2)
 Rectosigmoid13 5557485.55.6(5.1 to 6.2)
 Rectum43 34220234.74.6(4.3 to 5.0)
Charlson comorbidity score
 0137 92473335.35.4(5.0 to 5.7)
 113 618175413.013.1(12.2 to 14.1)
 2655194614.014.7(13.2 to 16.3)
 ≥3282767124.024.2(22.0 to 26.5)
Dukes' stage
 A17 1516063.54.2(3.7 to 4.7)
 B53 71131225.86.2(5.8 to 6.6)
 C51 39032476.37.1(6.7 to 7.6)
 D14 23412879.09.9(9.3 to 10.6)
 Unknown24 434244210.0
IMD income category
 Most affluent31 53817905.75.7(5.3 to 6.1)
 235 13921136.06.0(5.5 to 6.5)
 334 40923206.76.8(6.4 to 7.2)
 431 88923587.47.3(6.9 to 7.8)
 Most deprived27 54121227.77.8(7.2 to 8.4)
 Unknown40410.2
Operation type
 Elective145 48084015.85.8(5.4 to 6.2)
 Emergency15 440230315.014.9(14.2 to 15.7)
  • IMD, Index of Multiple Deprivation.