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Table 1 Baseline characteristics and pre-operative values of 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 = 50) Mobile (n = 47)
BMI (kg/m2) 30.1 (±4.5) 28.7 (±4.2)
Side (L/R) 22/28 25/22
AKP during chair rise (VAS 0–10 median) 5 (0–10) 4 (0–8)
AKP during chair rise (yes/no %) 80/20 85.1/14.9
AKP during stair climb (VAS 0–10 median) 5.5 (0–10) 5 (0–9)
AKP during stair climb (yes/no %) 90/10 83/17
Ability to rise from a chair (able/unable %) 72/28 82.9/17.1
Ability to climb stairs (able/unable%) 97.9/2.1 95.3/4.7
Range of motion (ROM) (degrees)
 Flexion 110 (85–140) 110 (75–140)
 Extension −5 (−20–5) −5 (−35–5)
 Total 105 (70–140) 110 (65–140)
KSS
 Pain 48 (11–92) 49 (11–83)
 Function 55 (0–80) 60 (0–90)
 Total 101 (31–157) 106 (25–151)
RAND-36
 Physical functioning 30 (5–75) 35 (5–90)
 Social role functioning 62 (0–100) 62 (0–100)
 Physical role functioning 0 (0–100) 0 (0–100)
 Emotional role functioning 33 (0–100) 50 (0–100)
 Mental health 60 (4–100) 70 (8–96)
 Vitality 50 (15–95) 55 (0–90)
 Bodily pain 40 (0–80) 40 (0–80)
 General health perceptions 60 (15–95) 62.5 (20–100)
 General health change 50 (0–75) 50 (0–100)
Patellar tilt median (degrees)
 30 degrees flexion 2 (0–25) 2 (−1–13)
 60 degrees flexion 2 (0–13) 2 (0–11)
90 degrees flexion 1 (0–11) 2 (0–10)
Patella tilt mean (degrees + SD)
 30 degrees of flexion 2.70 ± 4.06 3.0 ± 3.39
 60 degrees of flexion 2.26 ± 2.72 2.72 ± 2.73
 90 degrees of flexion 1.58 ± 2.17 2.29 ± 2.51