Table 1 Age, BMI, comorbidity index summarized, and tibial articulating surface by mean ± std (n, median, min–max)

Age (years)

62.6 ± 8.12

(216, 63, 43–83)

62.6 ± 8.82

(216, 64, 30–86)

0.9457

BMI^a (kg/m²)

31.9 ± 6.12

(216, 29.8, 15.6–52.7)

31.7 ± 6.39

(216, 30.9, 18.6–51.7)

0.4022

Derived Comorbidity Index

0.83 ± 1.12

(216, 0.5, 0–6)

0.85 ± 1.12

(216, 0.5, 0–5)

0.6621

Sex n = Female (%)

131 (60.6%)

131 (60.6%)

1.0000

ASA Class

0.6218^#

 I

11 (5.2%)

15 (6.9%)

 II

125 (59.0%)

137 (63.4%)

 III

71 (33.5%)

58 (26.9%)

 IV

1 (0.5%)

1 (0.5%)

 Not Reported

4 (1.9%)

5 (2.3%)

Tibial Articulating Surface

 Cruciate Retaining

11

37

 <0.0001^#

 Posterior Stabilized

49

55

 Ultra-Congruent

2

47

 Medial Congruent

120

52

 Constrained Posterior Stabilized

33

17