To investigate whether elective joint arthroplasty performed
at the weekend is associated with a different 30-day mortality We examined the 30-day cumulative mortality rate (Kaplan-Meier)
for all elective hip and knee arthroplasties performed in England
and Wales between 1st April 2003 and 31st December 2014, comprising
118 096 episodes undertaken at the weekend and 1 233 882 episodes
performed on a weekday. We used Cox proportional-hazards regression
models to assess for time-dependent variation and adjusted for identified
risk factors for mortality.Aims
Patients and Methods