K-WOMAC global score ( moxibustion 25.42 + / - SD 19.26 , UC 33.60 + / -17.91 , p < 0.01 , effect size = 0.0477 ) , NRS ( moxibustion 44.77 + / -22.73 , UC 56.23 + / -17.71 , p < 0.01 , effect size = 0.0073 ) and timed-stand test ( moxibustion 24.79 + / -9.76 , UC 25.24 + / -8.84 , p = 0.0486 , effect size = 0.0021 ) were improved by moxibustion at 5 weeks .