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Table 1 Patients’demographic data between the two groups

From: Excellent outcomes with Oxford Uni-compartmental knee arthroplasty in anteromedial osteoarthritis patients (≤60 years) at mid-term follow-up

Variables

Younger group(≤60 years)

Elderly group(>60 years)

F value/x2

P value

Knees

96

156

Age(years)

55.6 ± 4.0

69.0 ± 5.9

−19.70

< 0.001

Sex

  

0.231

0.631

 female

68(70.8%)

106(67.9%)

  

 male

28(29.2%)

50(32.1%)

  

Operation Side

  

0.632

0.427

 right

56(58.3%)

83(53.2%)

  

 left

40(41.7%)

73(46.8%)

  

BMI(Kg/m2)

26.9 ± 1.6

27.2 ± 2.7

−1.413

0.159

ASA classification

  

0.718

0.397

 1 to 2

81(84.4%)

125(80.1%)

  

 3 to 4

15(15.6%)

31(19.9%)

  

OA grade in MC(KL)

  

1.462

0.227

 III

36(37.5%)

47(30.1%)

  

 IV

60(62.5%)

109(69.9%)

  

Follow-up(months)

73.6 ± 4.1

74.7 ± 6.2

−1.521

0.130

  1. Values are expressed as mean ± SD (standard deviation)or number (percentage); BMI body mass index, ASA American society of anesthesiologist, OA osteoarthritis, MC medial compartment, KL Kellgren-Lawrence score