Table 1 Patient demographics at time of primary TKA

Patient age (mean years ± SD)^b

62.09 ± 7.86

60.72 ± 10.38

0.345

Sex, n (%)^a

 Female

39 (70.9)

67 (59.8)

0.176

 Male

16 (29.1)

45 (40.2)

Race, n (%)^a

 White

26 (47.3)

60 (53.6)

0.220

 Black

14 (25.5)

27 (24.1)

 Asian

2 (3.6)

0 (0.0)

 Other

13 (23.6)

25 (22.3)

Smoking status, n (%)^a

 Never

30 (54.5)

54 (48.2)

0.742

 Former

20 (36.4)

46 (41.1)

 Current

5 (9.1)

12 (10.70

Laterality, n (%)^a

 Right

29 (52.7)

56 (50.0)

0.745

 Left

26 (47.3)

56 (50.0)

Diabetes mellitus, n (%)^a

17 (30.9)

34 (30.4)

1.000

Inflammatory arthritis, n (%)^a

6 (10.9)

11 (9.8)

0.792

BMI (mean kg/m² ± SD)^b

33.85 ± 7.33

34.82 ± 7.24

0.421

ASA score, n (%)^a

 1

0 (0.0)

2 (1.8)

0.134

 2

36 (65.5)

54 (48.2)

 3

19 (34.5)

54 (48.2)

 4

0 (0.0)

2 (1.8)

Indication for TKA, n (%)^a

 Osteoarthritis

53 (96.4)

102 (91.1)

0.217

 Posttraumatic arthritis

0 (0.0)

6 (5.4)

 Inflammatory arthritis

2 (3.6)

4 (3.6)

Prior ipsilateral knee surgery, n (%)^a

22 (40.0)

45 (40.2)

1.000

Time to rTKA (mean months ± SD)^b

17.89 ± 13.47

10.47 ± 11.88

< 0.001**

Mean follow-up since rTKA (mean months ± SD)^b

16.70 ± 13.78

23.88 ± 16.62

0.004**