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Table 3 Ability to do high-flexion activities in groups according to final knee flexion after TKA at follow-up

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

High-flexion activity Impossible (Estimated proportion, %)a Hard to do (Estimated proportion, %)a Easy to do (Estimated proportion, %)a Odd ratio for easy to do (95% CI) p-value p for interaction with time
2 years 5 years 10 years 2 years 5 years 10 years 2 years 5 years 10 years
Kneel
 Final knee flexion < 130° 80.0 68.8 45.1 14.1 21.0 31.6 5.9 10.2 23.3 1 (Reference) < 0.001 n.s.
 Final knee flexion ≥130° 59.2 50.2 35.5 26.1 29.9 33.3 14.7 19.9 31.3 3.25 (1.88–5.64)
Squat
 Final knee flexion < 130° 72.9 60.5 37.5 18.6 25.5 33.1 8.5 14.0 29.4 1 (Reference) < 0.001 n.s.
 Final knee flexion ≥130° 47.1 39.4 27.8 31.0 32.8 32.8 22.0 27.8 39.4 3.56 (2.08–6.12)
Sit cross-legged
 Final knee flexion < 130° 41.5 36.5 28.7 32.4 33.2 33.0 26.0 30.3 38.3 1 (Reference) < 0.001 n.s.
 Final knee flexion ≥130° 13.9 13.9 13.9 25.4 25.3 25.3 60.7 60.8 60.9 5.04 (2.95–8.63)
Stand from the floor
 Final knee flexion < 130° 14.5 15.1 16.1 59.5 58.4 56.6 25.9 26.5 27.3 1 (Reference) < 0.001 n.s.
 Final knee flexion ≥130° 35.8 29.5 20.6 31.0 37.4 49.0 33.3 33.1 30.4 4.09 (2.21–7.58)
  1. n.s. not significant
  2. a Estimated after adjustment for age, sex, body mass index, bilateral TKA, and patellar resurfacing