Fig. 3From: Application of unicompartmental knee arthroplasty in the treatment of knee osteoarthritisKaplan-Meier survival analysis for Iwano classification: the 10-year survival rate of grade 0–1 group was 98.9%, that of grade 2 group was 92.7%, that of grade 3 group was 97.8%, and that of grade 4 group was 96% (χ2 = 4.162, p = 0.244)Back to article page