The electronic records of 857 participants in the Health In Men Study (HIMS) who had had TJR were
linked with Western Australia HMD. HMD-recorded diagnosis of obesity was validated using the actual weight and
height obtained from HIMS. In-hospital major complications were modelled using multivariable logistic regressions
that either included the actual weight and height or HMD-recorded obesity. Model discrimination was calculated
using area under ROC curve.