Burn E, et al. - Researchers examined how the risk of revision following total knee and hip replacement (TKR and THR) is influenced by body mass index (BMI) and smoking. From the Clinical Practice Research Datalink, primary care data was obtained and linked to inpatient hospital records from Hospital Episode Statistics Admitted Patient Care. TKR cohort included 10,260 individuals and THR cohort included 10,961 individuals. For a change in BMI from 25 to 35, the expected change in 10-year risk of revision was from 4.6% to 3.7% for TKR and 3.7% to 4.0% for THR for an otherwise average patient profile. Meanwhile, the risk of revision change from 4.1% to 2.8% for TKR and from 3.8% to 2.9% for THR in correlation to changing from a non-smoker to a current smoker in an otherwise average patient profile. Findings thereby suggest no meaningful impact of obesity and smoking on the risk of revision following TKR and THR.