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Table 1 Demographic data

From: The comparison of anterior knee pain in severe and non severe arthritis of the lateral facet of the patella following a mobile bearing unicompartmental knee arthroplasty

Variable Non severe arthritis of the lateral facet of the patella
(n = 88)
Severe arthritis of the lateral facet of the patella
(n = 26)
P value
Age (years)a 65.1 ± 6.9 (53–88) 66.0 ± 9.5 (44–84) 0.59
Sex (male/female) 13/75 2/24 0.05
Site (right/left) 43/45 7/19 0.35
BMI (kg/m2)a 26.3 ± 4.1 (20.0–42.2) 27.5 ± 4.0 (21.4–41.6) 0.19
The Knee Society score© (points)a 34.9 ± 2.3 (27–40) 33.8 ± 3.3 (27–44) 0.04
Pain score (points)a 12.16 ± 5.1 (0–20) 12.31 ± 7.1 (0–20) 0.91
Functional score (points)a 47.22 ± 6.5 (35–65) 44.00 ± 6.1 (30–50) 0.03
ROM (°)a 121.0 ± 7.1 (90–130) 112.3 ± 12.3 (90–130) <0.001
Pre-operative tibiofemoral angle (°)a Varus 3.2 ± 2.6 (0–13) Varus 9.0 ± 3.9 (5–20) <0.001
Flexion contracture (°)a 4.9 ± 4.2 (1–15) 7.4 ± 5.8 (1–18) 0.02
Recurvatum (°)a 1.2 ± 2.8 (5–10) 0.7 ± 2.1 (5–8) 0.45
Anterior knee pain (%) 75 % 84.6 % 0.35
VAS for Anterior knee pain (points)a 2.1 ± 1.9 (0–8) 3.2 ± 2.0 (0–6) 0.02
  1. aValues are expressed as a mean ± SD, with ranges in parentheses