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Table 4 Radiological outcome in both groups before TKA

From: The effect of high tibial osteotomy on the results of total knee arthroplasty: a matched case control study

  Index*   Index* Control*  
  pre HTO pre TKA P pre TKA pre TKA P
FTAa -3.0° (-9; 0) 3.0° (-2; 9) < 0.0001 3.0° (-2; 9) 2.0° (-3; 11) NS
PIb 6.0° (-2; 14) 3.0° (-13; 16) 0.04 3.0° (-13; 16) 6.5° (4; 16) 0.04
ISc 1.06 (0.74; 1.29) 0.95 (0.58; 1.20) 0.002 0.95 (0.58; 1.20) 1.07 (0.76; 1.29) 0.05
  1. * The values are given as the mean (range)
  2. - Negative value indicates varus alignment
  3. a Femorotibial angle
  4. b Posterior inclination tibia plateau
  5. c Patella height: Insall-Salvati ratio