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Table 2 Patients’ Knee Society grading scores

From: No patella resurfacing total knee arthroplasty leads to reduction in the thickness of patellar cartilage to less than half within 5 years: a quantitative longitudinal evaluation using MRI

Knee Society grading scale
 α 98.0 (3.2)
 β 89.8 (2.6)
 γ 3.9 (2.7)
 δ 85.5 (3.0)
  1. Data are reported as mean (standard deviation)