Skip to main content

Table 5 Multivariable analysis results for the association between more than 130 degrees of knee flexion and patients’ quality of life after TKA

From: A high degree of knee flexion after TKA promotes the ability to perform high-flexion activities and patient satisfaction in Asian population

Variable   Univariable   Multivariable   Multivariable  
  OR (95% CI) p-value OR (95% CI) p-value OR (95% CI) p-value
Knee flexion after TKA (°)   1.01 (1–1.02) 0.025 1.003 (0.993–1.013) 0.569   
≥130° of Knee flexion after TKA (°)
 No   1 (Reference)     1 (Reference)  
 Yes   1.5 (1.12–2) 0.006    1.17 (0.872–1.569) n.s.
Ability to do high-flexion activities
 Kneel (reference: impossible) Hard to do 0.96 (0.72–1.27) n.s.     
Easy to do 0.94 (0.55–1.62) n.s.     
 Squat (reference: impossible) Hard to do 0.86 (0.65–1.14) n.s.     
Easy to do 1.09 (0.65–1.82) n.s.     
 Sit cross-legged (reference: impossible) Hard to do 1.25 (0.92–1.7) n.s. 1.039 (0.755–1.428) n.s. 1.028 (0.748–1.413) n.s.
Easy to do 2.97 (2.08–4.24) < 0.001 1.787 (1.204–2.653) 0.004 1.74 (1.169–2.589) 0.006
 Stand from the floor (reference: impossible) Hard to do 3.08 (1.38–6.87) 0.006 2.639 (1.172–5.942) 0.019 2.619 (1.163–5.898) 0.02
Easy to do 8.25 (3.59–18.98) < 0.001 5.359 (2.267–12.668) < 0.001 5.325 (2.252–12.589) < 0.001
Age (years) (reference: <  60) 60 - < 75 1.25 (0.76–2.04) 0.38     
≥ 75 1.14 (0.64–2.04) n.s.     
Male (vs. female)   2.28 (1.31–3.97) 0.004 2.379 (1.383–4.092) 0.002 2.388 (1.388–4.11) 0.002
Body mass index (kg/m2) (reference: <  25) 25 - < 30 1.21 (0.87–1.7) n.s.     
≥ 30 1.11 (0.71–1.74) n.s.     
Bilateral TKA (vs. unilateral TKA)   1.57 (1.15–2.15) 0.005 1.66 (1.22–2.259) 0.001 1.663 (1.222–2.262) 0.001
Patellar resurfacing (vs. un-resurfacing)   0.87 (0.6–1.27) n.s.     
  1. OR odds ratio, CI confidence interval, n.s. not significant