McMinn et al. investigated revision rate and mortality rate using the National Joint Registry in the United Kingdom
[116]. The study investigated approximately 250000 cases . Due to large baseline differences in patient characteristics, unadjusted comparisons were not reliable or appropriate .The authors found that mortality rates were higher in cemented procedures compared to cementless ones (0.4% versus 0.2% at 30 days, 0.8% versus 0.5% at 90 days, and 21.8% versus 12.3% at eight years). Implant survival at six years was 98% in cemented procedures and 97% in cementless ones. The authors conclude that although differing patient characteristics may have confounded results, there was a small but significant increase in revision rate in cementless procedures and a small but significant increase in death in cemented procedures.