Pre-operative mental wellbeing and the outcome of knee replacement

This study aimed to detennine if a difference exists between the mental well being of patients prior to total knee, inedial unicompartmental and patellofemoral joint replacement and then assessed its effect on outcome. One hundred and thirteen patients were identified (41 TKR, 37 UKR and 35 PFJR). All patients had mental health assessed pre-operatively using SF-12. The reduced WOMAC (rWOMAQ score was used pre-operatively and then at 8 and 24 months post-operation to assess outcome. Reduced pre-operative mental wellbeing was found in 54% of tile patients. There was no statistically significant difference demonstrated between the mean mental component scores (MCS) between the three operation groups. The mean rWOMAC at 24 months in the MCS 40 group was 28 compared to 17 in those with high mental well being (MCS > 60). Pre-operative MCS had a significant effect, such that reduced mental wellbeing was associated with a worse 24 month outcome. (c) 2008 Elsevier B.V. All rights reserved.