WOMAC score, on the pain visual analogue scale, and the PQLC
score, using Student’s t test for independent samples. We set
P < 0.05 as the significance level for all the tests. For patients who
withdrew, the score we used for each variable was the worst of the
scores obtained for the intervention group and the best obtained
for the control group.When a diagnosis of bilateral osteoarthri-
tis of the knee had been made, the knee with the worse results at
baseline was the knee we evaluated in the final analysis.