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Table 5 Recent studies reported the change of the joint-line convergence angle (JLCA) after high tibial osteotomy

From: Change of joint-line convergence angle should be considered for accurate alignment correction in high tibial osteotomy

Author (year) N
(M/F)
Age
(years)
BMI (kg/m2) F/U Mechanical femorotibial angle (mFTA) Joint-line convergence angle
Preoperative Postoperative ΔmFTA Preoperative Postoperative ΔJLCA
Oh (2016) [17] 69 (13/56) 54.4 ± 7.2 27.0 ± 3.2 6 W to 3 M − 6.0° ± 4.0° (− 22.2 to − 0.3°) 3.3° ± 3.3° (4.9–10.6°) 9.4° ± 4.7° (1.4–24.5°) 1.8° ± 1.8° (− 3.1–9.8°) 0.5° ± 1.7° (− 5.3–5.9°) − 1.2° ± 1.6° (− 7.0–2.0°)
Lee (2016) [16] 86 (20/66) 57 (41–72) 25.7 6 M − 8.0° ± 3.9° (− 1 to − 17°) 3.4° ± 2.3° (− 2 to −  7°) 9.78° 3.4° ± 2.3° (− 1.5–10.4°) 2.1° ± 2.3° (7–2°) − 1.3° (− 2.1–8.4°)
Shin (2016) [18] 50 (21/29); 47 (27/20) 63.9 ± 4.8; 63.5 ± 7.7 26.2 ± 3.2; 26.0 ± 2.6 Last F/U (≥ 6 W) − 7.5° ± 3.1°; − 7.4° ± 4.2° 2.8° ± 1.8°; 2.5° ± 2.2° 10.3° ± 3.5°;9.9° ± 5.3° 3.6° ± 2.4°; 3.6° ± 1.6° 1.8° ± 2.0°; 1.9° ± 1.8° − 1.8° ± 1.6°; − 1.7° ± 1.3°
Ogawa (2016) [13] 50 (22/28) 62.3 ± 7.4 N/A 6 M − 9.6° ± 4.0° 3.2° ± 2.3° 12.8° ± 4.3° 4.6° ± 2.2° 2.7° ± 1.6° − 2.0° ± 1.5°
Park (2017) [27] 100 (5/89) 58.7 ± 7.4 (41–72) 25.0 ± 2.7 3/6/12/24 M/last F/U − 8.1° ± 2.9° 1.6° ± 1.9° 9.7° ± 3.0° 4.4° 3.9°; 4.0°; 4.1°; 4.2°; 4.3° − 0.2° to − 0.5°
The current study 80 (13/67) 57.4 ± 7.4 26.3 ± 3.7 ≥ 3 M − 5.6° ± 3.4° 3.3° ± 2.7° 8.9° ± 3.5° 2.7° ± 1.6° 1.8° ± 1.1° − 0.9° ± 1.2°
  1. BMI body mass index, F/U follow-up when the postoperative. whole-leg radiographs were taken, ΔmFTA the amount of change in the mFTA after high tibial osteotomy, ΔJLCA the amount of change of the JLCA after high tibial osteotomy, N/A not applicable