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Table 2 Primary and secondary outcomes

From: Comparison of fixed and mobile-bearing total knee arthroplasty in terms of patellofemoral pain and function: a prospective, randomised, controlled trial

  Fixed (n = 48) Mobile (n = 42) p-value
Primary outcomes
 AKP during chair rise median (VAS 0–10) 0 (0–7) 0 (0–7) 0.5
 AKP during chair rise (yes/no %) 22/78 14.9/85.1 0.3
 AKP during stair climb median (VAS 0–10) 0 (0–8) 0 (0–7) 0.8
 AKP during stair climb (yes/no %) 16/84 17/83 0.9
Secondary outcomes
 Ability to rise from chair (able/unable %) 97.9/2.1 95.2/4.8 0.6*
 Ability to climb stairs (able/unable%) 97.9/2.1 97.9/4.8 0.6*
Range of motion (ROM) (degrees)
 Flexion 110 (80–130) 110 (85–130) 0.9
 Extension 0 (−10–5) −0 (−10–5) 0.7
 Total 110 (70–130) 110 (85–130) 0.9
KSS
 Pain 94.0 (62–100) 95 (61–100) 0.8
 Function 80 (30–100) 87.5 (5–100) 0.8
 Total 174.5 (102–200) 178.5 (95–200) 0.8
RAND-36
 Physical functioning 55 (5–100) 55 (0–100) 0.6
 Social role functioning 75 (25–100) 75 (0–100) 0.7
 Physical role functioning 25 (0–100) 25 (0–100) 0.7
 Emotional role functioning 100 (0–100) 67 (0–100) 0.3
 Mental health 68 (4–100) 72 (20–100) 0.5
 Vitality 60 (0–100) 65 (15–90) 0.9
 Bodily pain 67 (12–100) 67 (0–100) 0.7
 General health perceptions 65 (10–95) 55 (10–95) 0.6
 General health change 50 (25–75) 50 (0–100) 0.6
Patellar tilt median (degrees)
 30 degrees flexion 1 (0–15) 0.5 (0–17) 0.4
 60 degrees flexion 0 (0–15) 0 (0–20) 0.6
 90 degrees flexion 0 (0–16) 0 (0–20) 0.4
Patellar tilt mean (degrees + SD)
 30 degrees flexion 2.56 ± 3.62 1.98 ± 3.58  
 60 degrees flexion 1.96 ± 3.15 1.80 ± 3.82  
 90 degrees flexion 1.81 ± 3.25 1.40 ± 3.42  
  1. *Fisher’s Exact test