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Table 1 Patients’ background characteristics

From: Assessment of valgus laxity after release of the medial structure in medial open-wedge high tibial osteotomy: an in vivo biomechanical study using quantitative valgus stress radiography

Variable Frequency
Age (y) 60.4 (8.7)
Male/female (patients) 20/64
Right/left side (knees) 51/42
Unilateral/bilateral (knees) 84/9
Body weight (kg) 65.7 (12.1)
BMI (kg/m2) 26.6 (4.0)
Young adult mean (%) of the bone mineral density 90.8 (15.8)
OA gradea (patients)
 Grade 0 0 knees
 Grade 1 0 knees
 Grade 2 17 knees
 Grade 3 61 knees
 Grade 4 6 knees
SONKb (patients)
 Stage 1 0 knees
 Stage 2 4 knees
 Stage 3 4 knees
 Stage 4 1 knee
  1. Mean (standard deviation).
  2. OA osteoarthritis, SONK spontaneous osteonecrosis of the knee.
  3. aKellgren-Lawrence grading system
  4. bKoshino’s stage [23]