Table 1

Characteristics of patients with primary total knee arthroplasty

Two-year follow-up(n = 7,139)

Five-year follow-up(n = 4,234)


Mean age, yrs (± SD)

68 ± 10

68 ± 10

Men/women (%)

44/56

45/55

Bilateral (%)

20

23

Age groups (%)

≤ 60 yrs

18

18

> 60 to 70 yrs

35

37

> 70 to 80 yrs

38

38

> 80 yrs

8

7

Body mass index, kg/m2 (%)

< 25.0

13

13

25.0 to 29.9

35

36

30.0 to 34.9

29

43

35.0 to 39.9

14

7

≥ 40.0

9

7

ASA score (%)

Class I to II

58

58

Class III to IV

42

41

Cemented (%)

Yes

98.0

99.5

Hybrid

2.0

0.5

Underlying diagnoses (%)

Rheumatoid arthritis/ othera Inflammatory arthritis conditions

4

4

Osteoarthritis

94

93

Other

2

3


ASA, American Society of Anesthesiologists. aOther includes avascular necrosis, fracture, neoplasms, Paget's disease, septic arthritis, etcetera.

Singh and Lewallen Arthritis Research & Therapy 2012 14:R248   doi:10.1186/ar4091

Open Data