Table 2.
Factors associated with return to work in working patients <65 years of age undergoing total joint arthroplasty
| THA patients working preoperatively | TKA patients working preoperatively | |||||||
|---|---|---|---|---|---|---|---|---|
| Full return to work (N=53) | No or partial return to work (N=14) | p value** | Odds ratio (95% CI)*** | Full return to work (N=40) | No or partial return to work (N=16) | p value** | Odds ratio (95% CI)*** | |
| Sex, Female | 28 (53) | 5 (36) | 0.369 | 24 (60) | 7 (44) | 0.374 | ||
|
Mean age, years (SD) 18–45 46–55 56–65 |
55.1 (6.5) 7 (13) 15 (28) 31 (59) |
58.7 (6.6) 1 (7) 1 (7) 12 (86) |
0.012* | 55.3 (5.7) 3 (8) 13 (33) 24 (60) |
57.0 (5.7) 1 (6) 2 (13) 13 (81) |
0.317 | ||
| Body mass index; mean (SD) | (N=52) 28.0 (6.2) | 26.1 (4.8) | 0.153 | (N=39) 29.7 (4.3) | 30.9 (4.7) | 0.344 | ||
|
Education level# Low Medium High |
(N=52) 10 (19) 24 (46) 18 (35) |
9 (64) 2 (14) 3 (21) |
0.006* |
11 (28) 18 (45) 11 (28) |
5 (31) 7 (44) 4 (25) |
1.000 | ||
| Self employed# | (N=46) 5 (11) | (N=13) 6 (46) | 0.009* | 7.63 (1.5–39.8) | (N=39) 5 (13) | (N=15) 3 (20) | 0.390 | 2.69 (0.5–15.8) |
| Preoperative working hours, mean (SD) | 30.8 (11.9) | 36.1 (14.2) | 0.230 | 29.8 (11.4) | 34.4 (14.1) | 0.207 | ||
|
Type of work Light work Medium work Heavy work |
(N=46) 33 (72) 10 (22) 3 (7) |
(N=13) 8 (62) 4 (31) 1 (8) |
0.672 | (N=39) 33 (85) 1 (3) 5 (13) |
(N=15) 14 (93) 1 (7) 0 (0) |
0.270 | ||
| Preoperative absence from work due to hip or knee complaints# | (N=46) 10 (22) | (N=13) 9 (69) | 0.002* | 8.62 (1.9–39.0) | (N=36) 9 (25) | (N=14) 7 (50) | 0.105 |
4.18 (1.0–17.1) |
| Preoperative work adaptions# | (N=35) 6 (17) | (N=11) 5 (45) | 0.100 | (N=33) 13 (39) | (N=13) 3 (23) | 0.493 | ||
| Preoperative workers' compensation | (N=46) 3 (7) | (N=13) 2 (15) | 0.302 |
(N=39) 4 (10) | (N=15) 2 (13) | 1.000 | ||
| Expectation over return to work, Back to normal | (N=40) 36 (90) |
(N=8) 7 (88) |
1.000 |
(N=36) 33 (92) |
(N=10) 8 (80) |
0.201 |
||
|
Baseline HOOS or KOOS, mean (SD) ADL# Pain# Quality of life# Sport# Symptoms |
(N=49) 39 (16) (N=51) 36 (19) (N=52) 33 (9) (N=51) 13 (16) (N=52) 32 (18) |
(N=13) 53 (18) 50 (24.2) 35 (11) 24 (22) 29 (25) |
0.018* 0.058 0.913 0.096 0.439 |
1.03 (1.0–1.1) |
(N=36) 46 (15) (N=38) 36 (14) (N=37) 32 (10) (N=37) 10 (11) (N=37) 43 (15) |
(N=15) 40 (18) 34 (17) 28 (6) 7 (11) 41 (14) |
0.331 0.711 0.114 0.188 0.642 |
0.99 (0.9–1.0) |
|
Change in HOOS or KOOS, mean (95% CI) ADL Pain Quality of life Sport Symptoms |
(N=39) 53 (47–58) (N=42) 54 (48–60) (N=43) 19 (14–24) (N=42) 52 (43–60) (N=44) 49 (42–56) |
(N=11) 38 (27–50) (N=11) 49 (35–63) (N=11) 20 (8–32) (N=10) 51 (35–67) (N=11) 65 (48–82) |
0.016* 0.546 0.786 0.798 0.075 |
(N=31) 37 (31–44) (N=33) 44 (38–51) (N=33) 16 (9–23) (N=32) 37 (27–47) (N=33) 9 (4–14) |
(N=14) 29 (14–44) (N=15) 36 (21–50) (N=13) 10 (2–17) (N=14) 19 (6–32) (N=15) 0.7 (–7–9) |
0.166 0.278 0.299 0.039* 0.072 |
||
| Oxford Knee/Hip Score, mean (SD) | (N=48) 23 (7) | (N=12) 25 (8) | 0.244 | (N=38) 24 (7) | 24 (7) | 0.962 | ||
| Oxford Knee/Hip change score, mean (95% CI) | (N=42) 20 (1–18) | (N=11) 18 (14–23) | 0.356 | (N=34) 16 (14–19) | (N=15) 12 (5–18) | 0.086 | ||
*Comparison of full return to work versus partial or no return to work patients using Chi-squared or Mann-Whitney U tests, where appropriate
**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