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[Patient satisfaction and muscle torque after total knee replacement in dependence on body mass index]
J Schaumburger1, P Lechler, S Riedt
1Klinik und Poliklinik für Orthopädie-Lehrstuhl für Orthopädie der Universität Regensburg, Asklepios Klinikum Bad Abbach GmbH, Bad Abbach, 93077 Bad Abbach. jens.schaumburger@klinik.uni-regensburg.de
Aim:
In a monocentric study, we investigated patient satisfaction, clinical outcome and isokinetic muscle torque in dependence on the body mass index (BMI) in the mid-term outcome after total knee arthroplasty.
Patients And Methods:
A group-matched study with two groups (each 40 knee arthroplasties in 40 patients) with a normal body mass index (BMI 20-25) and above 25 was conducted. The groups were matched for sex, diagnosis and age. Satisfaction, HSS score and isokinetic torque parameters with the Cybex 340 system were measured.
Results:
There were no differences in the demographic data except for BMI. The HSS score was significantly lower in the overweight group (p = 0.04). Also there were more patients with an HSS score below 60 (bad result) in the group with the higher BMI (0 vs. 9, p = 0.002). Only one patient was not satisfied in the normal weight group, whereas 9 patients in the group BMI > 25 were not satisfied (p = 0.014). No differences between the groups could be found in maximum torque, work and power.
Conclusion:
The patient satisfaction was much lower in patients with BMI higher than 25. There were no differences between the groups in isokinetic torque parameters.
