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Table 1 Pre-operative demographic data

From: Influence of navigation system updates on total knee arthroplasty

  Version 3.1 group Version 4.0 group P-value
Number of patients 33 49  
Sex (female/male) 30/3 43/6  
Diagnosis (OA/others) 31/2 47/2  
Age (years) 75.0 ± 5.0 75.5 ± 5.1 n.s.
Pre-operative KSS 37.9 ± 10.5 36.4 ± 10.1 n.s.
Maximum extension (°) −9.8 ± 7.2 −11.8 ± 7.1 n.s.
Maximum flexion (°) 120.1 ± 16.4 119.2 ± 15.7 n.s.
Body mass index (kg/m2) 26.2 ± 3.7 26.1 ± 4.1 n.s.
Pre-operative FTA (°) 185.8 ± 6.9 186.1 ± 9.6 n.s.