The Influence of Obesity on Patient Reported Outcomes following Total Knee Replacement
Table 1
Mean (std.) of the demographics and number (%) of comorbidities for the two BMI groups and the total sample. P values of one-way ANOVA unless otherwise stated.
Variable
Total sample ()
Nonobese ()
Obese ()
Age (yrs)
66.7 (8.7)
68.0 (8.8)
65.7 (8.4)
0.089
BMI (kg/m2)
31.4 (5.6)
26.6 (2.1)
35.0 (4.7)
<0.001
Female (%)¥
105 (60.3)
36 (48.0)
69 (69.7)
0.002
R.A (%)
11 (6.3)
5 (6.6)
6 (6.1)
0.24
OKS (pre) (12–60)
43.3 (7.8)
41.1 (8.0)
44.7 (7.3)
0.003
SF12 PCS (pre)
29.0 (6.7)
28.8 (6.2)
30.0 (7.0)
0.833
SF12 MCS (pre)
49.4 (11.6)
51.1 (10.6)
48.3 (12.1)
0.118
Diabetes Mellitus (%)¥
23 (13.2)
5 (6.6)
18 (18.2)
0.015
Hypertension (%)¥
96 (55.2)
34 (45.3)
72 (72.7)
<0.001
Respiratory dis. (%)
33 (18.9)
15 (20)
18 (18.2)
0.16
Cardiac disease (%)¥
22 (12.6)
8 (10.7)
14 (14.1)
0.15
Vascular disease (%)¥
11 (6.3)
4 (5.3)
10 ( 10.1)
0.12
Previous TKR (%)¥
28 (16.1)
14 (18.6)
14 (14.1)
0.12
Previous THR (%)¥
22 (12.6)
8 (10.6)
14 (14.1)
0.15
¥Fisher’s exact test, RA: rheumatoid arthritis, PCS: physical component summary of the SF12, and MCS: mental component summary of SF12.
