Table 1 Case control comparison for risk of revision based on demographic and technical factors
Variables | Cases (N = 146) | Controls (N = 290) | Crude odds ratios | Adjusted odds ratios- final modela |
|---|---|---|---|---|
Continuous | Mean (SD) | Mean (SD) | OR (95 % CI) | OR (95 % CI) |
Age at Surgery b | 57.8 ± 13.2 | 65.4 ± 12.6 | 0.79 (0.72, 0.86) | 0.83 (0.75, 0.92) |
Cardiac Risk (0,1,2+)c | 1.6 ± 0.7 | 1.7 ± 0.7 | 0.91 (0.67, 1.22) | |
Categorical | N (%) | N (%) | OR (95 % CI) | OR (95 % CI) |
Gender | ||||
Male | 55 (38 %) | 74 (26 %) | 1.77 (1.15,2.72) | 1.73 (1.06, 2.81) |
Female | 91 (62 %) | 216 (74 %) | reference | reference |
Smoking | ||||
Yes | 29 (22 %) | 18 (6 %) | 4.46 (2.21, 9.03) | 2.87 ( 1.33, 6.19) |
No | 104 (78 %) | 263 (94 %) | reference | reference |
OA Diagnosis at Primary | ||||
No | 22 (16 %) | 24 (8 %) | 2.03 (1.09, 3.79) | 1.55 (0.75, 3.22) |
Yes | 118 (84 %) | 266 (92 %) | reference | Reference |
BMI Category | ||||
<30 | 75 (51 %) | 153 (53 %) | reference | |
30–35 | 31 (21 %) | 70 (24 %) | 0.84 (0.52,1.35) | |
35+ | 40 (27 %) | 67 (23 %) | 0.77 (0.44, 1.34) | |
Diabetes | ||||
Yes | 14 (10 %) | 43 (15 %) | 0.62 (0.33, 1.17) | |
No | 132 (90 %) | 247 (85 %) | reference | |
PCL Recession | ||||
Yes | 19 (15 %) | 51 (19 %) | 0.67 (0.35, 1.26) | |
No | 111 (85 %) | 212 (81 %) | reference | |
Lateral Release | ||||
Yes | 42 (29 %) | 59 (20 %) | 1.85 (1.13, 3.01) | 1.92 (1.07, 3.43) |
No | 88 (60 %) | 216 (75 %) | Reference | Reference |
Missing | 16 (11 %) | 15 (5 %) | 2.61 (1.24, 5.47) | 1.68 (0.68, 4.13) |
Post-Op Return to OR | ||||
Yes | 22 (15 %) | 10 (3 %) | 4.65 (2.13, 10.13) | |
No | 124 (85 %) | 280 (97 %) | reference | |