Background
Methods
Source of data
Study population
Op same day (n = 1,680) | Op ≤ 6 months (n = 4, 867) | Op 7–12 months (n = 7,809) | Op > 12 months (n = 27, 882) | p-value | |||||
---|---|---|---|---|---|---|---|---|---|
n | % | n | % | n | % | n | % | ||
Age
| |||||||||
<50 | 308 | 18.3 | 357 | 7.3 | 454 | 5.8 | 831 | 3.0 | <0.001a |
50-59 | 424 | 25.2 | 823 | 19.0 | 1,278 | 16.4 | 3,052 | 10.9 | |
60-75 | 788 | 46.9 | 2,792 | 57.4 | 4,499 | 57.6 | 15,357 | 55.1 | |
>75 | 160 | 9.5 | 795 | 16.3 | 1,578 | 20.2 | 8,642 | 31.0 | |
Diagnoses
| |||||||||
OA | 1,346 | 80.4 | 4,309 | 88.8 | 7,112 | 91.4 | 26,012 | 93.4 | <0.001a |
RA | 193 | 11.5 | 279 | 5.7 | 316 | 4.1 | 1,033 | 3.7 | |
Otherb | 136 | 8.1 | 266 | 5.5 | 351 | 4.5 | 819 | 2.9 | |
Sex
| |||||||||
Male | 767 | 45.7 | 2,074 | 42.6 | 3,176 | 40.7 | 11,106 | 39.8 | <0.001a |
Female | 913 | 54.3 | 2,793 | 57.4 | 4,633 | 59.3 | 16,776 | 60.2 | |
Fixation
| |||||||||
Cemented | 931 | 55.8 | 3.697 | 76.5 | 6,224 | 80.1 | 22,984 | 82.6 | <0.001a |
Uncemented | 372 | 22.3 | 563 | 11.6 | 686 | 8.8 | 2,147 | 7.7 | |
Otherc | 364 | 21.8 | 575 | 11.9 | 856 | 11.0 | 2,683 | 9.6 |
Op same day (n = 450) | Op < 6 months (n = 1,598) | Op 6–12 months (n = 2,286) | Op > 12 months (n = 10,892) | p-value | |
---|---|---|---|---|---|
BMI X (SD)
| 26.9(4.7) | 27.3(5.7) | 27.5(4.8) | 27.5(5.0) | 0.050a |
ASA n (%)
| |||||
1
| 157(33.5%) | 472(29.1%) | 624(26.5%) | 2,304(20.8%) | <0.001b |
2
| 250(53.3%) | 974(60.1%) | 1,398(59.4%) | 6,823(61.5%) | |
3-5
| 62(13.2%) | 174(10.7%) | 331(14.1%) | 1,967(17.7%) |
Terminology
Statistics
Results
30 days | 90 days | 10 years | ||||
---|---|---|---|---|---|---|
Survival | CI (95%) | Survival | CI (95%) | Survival | CI (95%) | |
Time interval
| ||||||
Simultaneous | 99.8 | 99.6-100.0 | 99.7 | 99.4-100.0 | 82.7 | 80.4-85.1 |
≤6 months | 99.8 | 99.7-99.9 | 99.7 | 99.6-99.9 | 78.1 | 76.5-79.|7 |
7-12 months | 99.9 | 99.8-100.0 | 99.8 | 99.7-99.9 | 76.9 | 7|5.7-78.2 |
>12 months | 99.8 | 99.8-99.9 | 99.7 | 99.6-99.7 | 71.5 | 70.7-72.3 |
Early postoperative mortality
Crude | Adjusted | |||||
---|---|---|---|---|---|---|
HR | CI (95%) | p | HR | CI (95%) | p | |
Time interval
| ||||||
Simultaneous | 0.69 | 0.4-2.2 | 0.82 | 1.3 | 0.5-3.3 | 0.59 |
≤6 months | 0.9 | 0.5-1.5 | 0.63 | 1.1 | 0.6-2.0 | 0.72 |
7-12 months | 0.5 | 0.3-1.0 | 0.03 | 0.7 | 0.4-1.2 | 0.14 |
>12 months (ref)a | 1.0 | - | - | 1.0 | - | - |
Sex
| ||||||
Male | 1.0 | - | - | 1.0 | - | - |
Female | 0.7 | 0.5-1.0 | 0.06 | 0.6 | 0.4-0.9 | 0.01 |
Age
| ||||||
<50 | 1.1 | 0.4-3.2 | 0.80 | 1.0 | 0.3-3.0 | 0.98 |
50-59 | 0.7 | 0.3-1.5 | 0.36 | 0.7 | 0.3-1.5 | 0.34 |
60-75 (ref) | 1.0 | - | - | 1.0 | - | - |
>75 | 3.6 | 2.6-5.8 | <0.001 | 3.8 | 2.6-5.6 | <0.001 |
Fixation
| ||||||
Cemented (ref) | 1.0 | - | - | 1.0 | - | - |
Uncemented | 0.5 | 0.2-1.1 | 0.09 | 0.9 | 0.4-2.2 | 0.80 |
Otherb | 0.7 | 0.4-1.3 | 0.27 | 1.1 | 0.6-2.2 | 0.75 |
Diagnoses
| ||||||
OA (ref) | 1.0 | - | - | 1.0 | - | - |
RA | 1.7 | 0.9-3.3 | 0.13 | 2.3 | 1.1-4.7 | 0.02 |
Otherc | 0.4 | 0.1-1.7 | 0.24 | 0.6 | 0.1-2.4 | 0.44 |
Crude | Adjusted | |||||
---|---|---|---|---|---|---|
HR | CI (95%) | p | HR | CI (95%) | p | |
Time interval
| ||||||
Simultaneous | 1.0 | 0.1-7.1 | 0.97 | 1.4 | 0.2-10.6 | 0.75 |
≤6 months | 0.5 | 0.1-2.3 | 0.41 | 0.7 | 0.2-2.9 | 0.61 |
7-12 months | 0.8 | 0.3-2.2 | 0.61 | 0.9 | 0.3-2.5 | 0.78 |
>12 months (ref)a | 1.0 | - | - | 1.0 | - | - |
BMI
| 1.0 | 0.9-1.1 | 0.83 | 1.0 | 0.9-1.1 | 0.76 |
ASA
| ||||||
1(ref) | 1.0 | - | - | 1.0 | - | - |
2 | 2.3 | 0.7-7.7 | 0.19 | 3.0 | 0.7-13.0 | 0.15 |
3-5 | 6.6 | 1.9-22.9 | 0.003 | 8.2 | 1.8-37.3 | 0.006 |
Sex
| ||||||
Male | 1.0 | - | - | 1.0 | - | - |
Female | 0.8 | 0.4-1.5 | 0.45 | 0.4 | 0.4-1.5 | 0.40 |
Fixation
| ||||||
Cemented (ref) | 1.0 | - | - | 1.0 | - | - |
Uncemented | 0.4 | 0.1-1.6 | 0.18 | 0.5 | 0.1-2.0 | 0.30 |
Otherb | 0.7 | 0.3-2.1 | 0.56 | 0.8 | 0.3-2.4 | 0.73 |
Crude | Adjusted | |||||
---|---|---|---|---|---|---|
HR | CI (95%) | p | HR | CI (95%) | p | |
Time interval
| ||||||
Simultaneous | 1.1 | 0.3-3.6 | 0.86 | 2.0 | 0.6-6.6 | 0.26 |
≤6 months | 1.0 | 0.5-2.2 | 0.96 | 1.4 | 0.7-3.0 | 0.39 |
7-12 months | 0.6 | 0.3-1.2 | 0.15 | 0.7 | 0.3-1.5 | 0.37 |
>12 months (ref)a | 1.0 | - | - | 1.0 | - | - |
Sex
| ||||||
Male | 1.0 | - | - | 1.0 | - | - |
Female | 0.8 | 0.5-1.3 | 0.38 | 0.7 | 0.4-1.2 | 0.16 |
Age
| ||||||
<50 | 0.5 | 0.1-4.1 | 0.55 | 0.6 | 0.1-5.3 | 0.68 |
50-59 | 0.4 | 0.1-1.6 | 0.18 | 0.4 | 0.1-1.7 | 0.22 |
60-75 (ref) | 1.0 | - | - | 1.0 | - | - |
>75 | 3.6 | 2.1-6.1 | <0.001 | 3.8 | 2.2-6.5 | <0.001 |
Fixation
| ||||||
Cemented (ref) | 1.0 | - | - | 1.0 | - | - |
Uncemented | 0.5 | 0.1-1.5 | 0.21 | 1.0 | 0.3-3.6 | 0.97 |
Otherb | 0.4 | 0.1-1.3 | 0.12 | 0.7 | 0.2-2.4 | 0.59 |
Overall mortality
Crude | Adjusted | |||||
---|---|---|---|---|---|---|
HR | CI (95%) | p | HR | CI (95%) | p | |
Time interval
| ||||||
Simultaneous | 0.6 | 0.5-0.6 | <0.001 | 0.9 | 0.8-1.0 | 0.089 |
≤6 months | 0.8 | 0.7-0.8 | <0.001 | 0.9 | 0.9-1.0 | 0.0|32 |
7-12 months | 0.8 | 0.8-0.8 | <0.001 | 0.9 | 0.9-1.0 | 0.007 |
>12 months (ref)a | 1.0 | - | - | 1.0 | - | - |
Sex
| ||||||
Male | 1.0 | - | - | 1.0 | - | - |
Female | 0.8 | 0.8-0.8 | <0.001 | 0.2 | 0.1-0.2 | <0.001 |
Age
| ||||||
<50 | 0.2| | 0.2-0.3 | <0.001 | 0.2 | 0.1-0.2 | <0.001 |
50-59 | 0.3 | 0.3-0.4 | <0.001 | 0.4 | 0.3-0.4 | <0.001 |
60-75 (ref) | 1.0 | - | - | - | - | - |
>75 | 3.1 | 3.0-3.3 | <0.001 | 3.2 | 3.1-3.4 | <0.001 |
Fixation
| ||||||
Cemented (ref) | 1.0 | - | - | - | - | - |
Uncemented | 0.3 | 0.2-0.3 | <0.001 | 0.7 | 0.6-0.8 | <0.001 |
Otherb | 0.3 | 0.3-0.4 | <0.001 | 0.7 | 0.6-0.7 | <0.001 |
Diagnoses
| ||||||
OA (ref) | 1.0 | - | - | 1.0 | - | - |
RA | 1.2 | 1.1-1.3 | <0.001 | 2.2 | 2.0-2.4 | <0.001 |
Otherc | 0.7 | 0.6-0.8 | <0.001 | 1.5 | 1.3-1.7 | <0.001 |