Table 3.
Comparison of characteristics of 123 patients undergoing Total Hip Arthroplasty (THA, n=67) or Total Knee Arthroplasty (TKA, n=56) who returned to work either completely or incompletely or not 1 year after surgery
|
Full return to work N=93 |
Partial or no return to work)
N=30 |
P value* | Odds Ratio (95% CI)** | |
|---|---|---|---|---|
| Type of prosthesis, THA# | 53 (79) | 14 (21) | 0.400 | |
| Sex, female# | 52 (56) | 12 (40) | 0.146 | |
|
Mean age, years (SD)# 18–45 46–55 56–65 |
55 (6.1) 10 (11) 28 (30) 55 (59) |
58 (6.1) 2 (7) 3(10) 25 (83) |
0.010* | |
| Body mass index, mean (SD) | (N=92) 29 (5.9) | 29 (5.3) | 0.929 | |
|
Education level# Low Medium High |
(N=92) 21 (23) 42 (46) 29 (32) |
14 (47) 9 (30) 7 (23) |
0.043* |
|
| Self employed# | (N=85) 10 (12) | (N=28) 9 (32) | 0.019* | 6.68 (1.9–23.4) |
| Preoperative hours worked, mean (SD)# | 31 (11.6) | 35 (13.9) | 0.119 | |
|
Type of work# Light work Medium work Heavy work |
(N=85) 66 (78) 11 (13) 8 (9) |
(N=28) 22 (79) 5 (18) 1 (4) |
0.627 | |
| Preoperative absence from work due to hip or knee complaints# | (N=82) 19 (23) | (N=27) 16 (59) | 0.001* | 7.22 (2.4–21.5) |
| Preoperative work adaptions# | (N=68) 19 (28) | (N=24) 8 (33) | 0.795 | |
| Preoperative workers’ compensation# | (N=85) 7 (8) | (N=28) 4 (14) | 0.461 | |
|
Expectation over return to work Back to normal |
(N=76) 69 (91) |
(N=18) 15 (83) |
0.397 |
|
|
Baseline HOOS or KOOS, mean (SD)# ADL Pain Quality of life Sport Symptoms |
(N=85) 42 (16.1) (N=89) 36 (16.9) (N=89) 33 (9.5) (N=88) 11 (13.9) (N=90) 37 (17.5) |
(N=28) 46 (18.9) (N=29) 41 (21.5) (N=29) 31 (9.1) (N=29) 15 (18.5) (N=29) 36 (20.3) |
0.272 0.308 0.187 0.875 0.840 |
1.03 (1.0–1.1) |
|
Change in HOOS or KOOS, mean (95% CI) ADL Pain Quality of life Sport Symptoms |
(N=69) 46 (18.4) (N=74) 50 (19.8) (N=75) 18 (18.0) (N=73) 45 (28.8) (N=76) 32 (27.9 |
(N=25) 33 (22.3) (N=26) 41 (25.0) (N=24) 14 (16.0) (N=24) 33 (27.2) (N=26) 28 (37.8) |
0.008* 0.169 0.475 0.055* 0.341 |
|
| Oxford Knee/Hip Score, mean (SD) | (N=86) 24 (7.0) | (N=28) 24 (7.6) | 0.341 | |
| Oxford Knee/Hip change score, mean (95% CI) | (N=75) 18.7 (7.9) | (N=26) 14 (10.1) | 0.063 |
*Comparison of full return to work versus partial or no return to work patients using Chi-squared or Mann-whitney U test, where appropriate. Stepwise logistic regression analysis used to correct for type of prosthesis, including all significant associations.
**Univariate analysis
***Multivariable stepwise regression model
#variable entered into model. Significance level: p<0.05. All values n (%) unless otherwise stated
ADL = Activities of Daily Living; HOOS/KOOS = Hip disability and Osteoarthritis Outcome Score/Knee injury and Osteoarthritis Outcome Score; SD = standard deviation;
THA = total hip arthroplasty; TKA = total knee arthroplasty