Page 158 - The value of total hip and knee arthroplasties for patients

Chapter 8
All clinical outcome measures, except for the SF-36 MCS, showed a statistically significant change over time, both in the THA and in the TKA groups.
One year after surgery, there were seven patients (three and four in the THA and TKA groups, respectively) who were working but had not been gainfully employed preoperatively. The preoperative employment status of these patients included: receiving a disability pension (n = 1), unemployed (n = 1) and doing volunteer work (n = 1) in the THA group and receiving a disability pension (n = 1), being retired (n = 1), unemployed (n = 1) and doing volunteer work (n = 1) in the TKA group.
Table 3 Return to work 1 year postoperatively and change scores with the 95 % confidence interval (CI) of clinical outcomes in working patients undergoing total hip or knee arthroplasty (THA orTKA)
Working situation, N (%)
Returned to work Sick leave
Retired
Unknown
Amount of weeks between operation and return to work
Mean (SD)
Median (minimum-maximum)
Hours working per week postoperatively, mean (SD)
Been in contact with the occupational physician about return to work, N (%)
Yes
No Unknown
HOOS or KOOS change scores, mean (95 % CI)
ADL
Pain
Quality of life Spor t Symptoms
Oxford Knee/Hip change score, mean (95 % CI) EQ-5D change score, mean (95 % CI) EQ5D-VAS scale change score, mean (95 % CI) SF-36 MCS change score, mean (SD; min–max) SF-36 PCS change score, mean (SD; min–max)
THA (N=71)
64 (90%) 2 (3%)
2 (3%)
3 (4%)
12.5 (7.6) 12 (1-40)
39 (55%) 26 (37%) 6 (8%)
49 (44–54)* 53 (47-58)* 19 (15-24)* 51 (44-59)* 51 (45-58)*
20 (18-22)* 0.3 (0.2-0.4)* 20 (14-26)* 1.3 (-1.3-3.7) 14.9 (13-17)*
TKA (n=64)
56 (89%) 3 (5%)
5 (8%)
0
12.9 (8.0) 12 (1-36)
39 (61%) 13 (20%) 12 (19%)
36 (31–43)* 43 (37-49)* 16 (10-21)* 34 (26-42)* 7 (3-11)*
15 (13-18)* 0.3 (0.2-0.3)* 13 (7-18)* -0.9 (-4-2) 12 (9-15)*
HOOS Hip disability and Osteoarthritis Outcome Score, KOOS Knee injury and Osteoarthritis Score, ADL Activity limitations—Daily Living, SF-36 Short Form 36 * Comparison of clinical outcomes before and after surgery was made by means of paired t test
Characteristics of patients returning and not returning to work
A comparison of the sociodemographic (gender, age, BMI, education level, living status), job characteristics and patient-reported outcomes (preoperative SF-36, EQ- 5D, EQ5D-VAS and HOOS/KOOS scores as well as change scores after 1 year) of
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