Table 2

Kaplan-Meier estimates of the cumulative percentage probability of mortality at 90 days, 1, 2 and 3 years postoperation (95% CI)

Number of deathsRate (95% CI)SMR
90 days20.13 (0.03 to 0.52)0.07
1 year110.72 (0.40 to 1.30)0.36
2 years130.85 (0.50 to 1.47)0.42
3 years140.92 (0.55 to 1.55)0.46
  • Standardised Mortality Ratio was calculated using the age and sex adjusted mortality data from the ONS.31

  • SMR, Mortality rate in TAR/age+sex adjusted mortality rate in the general population in 2013.

  • ONS, Office for National Statistics; SMR, Standardised Mortality Ratio; TAR, total knee replacement.