The Influence of Obesity on Patient Reported Outcomes following Total Knee Replacement

Table 4

Pearson’s correlation coefficients between BMI and the outcome measures before surgery, at 6 months and 1 year after surgery and between BMI and the change scores.

	OKS	SF12 (PCS)	SF12 (MCS)
Pre-op.	0.271*	−0.086	−0.101
6 months	0.115	0.143	−0.139
1 year	0.072	−0.206	−0.041
Pre-6m	−0.082	−0.117	−0.015
Pre-1yr	−0.194	−0.159	−0.068

* P < 0.01, PCS: physical component summary of the SF12, and MCS: mental component summary of SF12.