Page 62 - The value of total hip and knee arthroplasties for patients

Chapter 4
Preoperative Characteristics of Patients With and Without Follow-Up
Table 1 describes the preoperative characteristics of the patients with and without complete follow-up. In both the THA and TKA groups, most of the patients were female, and the mean age was 67 years. In the THA group, patients with incomplete follow-up (N=85) had higher body mass index scores, and their preoperative HOOS-activities of daily living, HOOS-pain, and HOOS-quality of life scores were lower. TKA patients with incomplete follow-up (N=95) had significantly higher KOOS quality of life and EuroQol 5-dimensional questionnaire scores.
Table 1. Characteristics of patients
Gender, Female; number (%)
Age, y (mean, SD)
Body Mass Index (mean, SD)
Education level; number (%)
Low Medium High
Living status: Living Independently; number (%)
Work status:Working; number (%)
HOOS or KOOS (0-100); mean (SD)
Activities of daily living Pain
Quality of life
Spor t
Symptoms
EQ5D score (0-1); mean (SD) EQ5D VAS scale (0-100); mean (SD)
Oxford Knee/Hip Score (0-48); mean (SD)
SF36 MCS (1-100); mean (SD) SF36 PCS (1-100); mean (SD)
THA patients with follow- up (N=343)
197 (57) 67.2 (9.5) 27.1 (4.4)
127 (37) 103 (30) 113 (33)
313 (91.3)
87 (25.4)
44.4 (17.6) 41.7 (18.2) 34.6 (10.6) 20.3 (18.9) 37.7 (18.2)
0.6 (0.3) 67.0 (18.3)
24.7 (7.3)
50.9 (10.3) 39.9 (7.4)
TKA patients with follow up
TKA P* Patients with incomplete follow up (N=95)
66 (70) .872 67.2 (10.1) .917 29.5 (5.1) .874
47 (49) .386 34 (36)
14 (15)
78 (83.0) .170 23 (24.5) .093
45.3 (18.9) .178 40.8 (18.1) .725 32.1 (11.0) .014 15.9 (17.5) .318 42.5 (12.8) .059
0.5 (0.3) .005 65.7 (19.4) .116
23.1 (9.0) .067
49.9 (12.5) .052 39.0 (7.4) .161
THA P*
Patients with
incomplete
follow up
(N=85) (N=322)
61 (71.4) .031 65.1 (12.3) .202 28.1 (4.5) .043
41 (48) .111 24 (28)
20 (24)
79 (92.9) .322 25 (29.8) .865
37.5 (18.0) .009 35.6 (16.9) .016 31.3 (8.8) .003 17.4 (17.5) .283 37.1 (19.5) .775
0.5 (0.3) .060 63.8 (19.1) .177
22.6 (8.6) .142
51.0 (10.4) .076 39.8 (7.4) .086
226 (70) 66.9 (9.5) 29.5 (4.5)
164 (51) 100 (31) 58 (18)
298 (92.5)
75 (23.3)
48.7 (17.7) 41.6 (16.2) 35.0 (10.5) 13.2 (15.7) 44.9 (13.5)
0.6 (0.3) 70.1 (18.4)
25.3 (6.8)
52.8 (10.2) 40.4 (7.4)
THA,total hip arthroplasty;TKA, total knee arthroplasty; SD, standarddeviation; HOOS, Hip Disability and Osteoarthritis Outcome Score; KOOS, Knee Injury and Osteoarthritis Outcome Score; EQ5D, EuroQol 5-dimensional questionnaire;VAS,Visual Analogue Scale; SF36, Short form-36 survey; MCS, component score for mental health score; PCS, component score for physical health score.
* Comparison of working and non-working patients at preoperative assessment by means of Mann- Whitney U or Chi Square tests where appropriate. Significance level < 0.05.
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