Table 3.
The statistical comparison in outcomes between AR and IF
| Outcomes | Studies (n) | Participants | Event (n/N) | Mean (95% CI) | I2 (%) | P | |
|---|---|---|---|---|---|---|---|
| AR | IF | ||||||
| Total mortality rate - RR | 6 | 1826 | 587/954 | 501/872 | 1.02 (0.96, 1.08) | 25 | 0.63 |
| Mortality rate within 1 year | 5 | 1284 | 167/732 | 126/552 | 1.06 (0.86, 1.30) | 0 | 0.58 |
| Mortality rate within 2 years | 4 | 1324 | 221/706 | 180/618 | 1.15 (0.98, 1.34) | 0 | 0.08 |
| Mortality rate >10 years | 2 | 726 | 362/409 | 290/317 | 0.97 (0.90, 1.06) | 59 | 0.52 |
| Total re-operation rate - RR | 6 | 1738 | 63/864 | 378/874 | 0.17 (0.13, 0.22) | 10 | <0.00001 |
| Re-operation rate within 1 year | 2 | 336 | 3/213 | 28/123 | 0.07 (0.02, 0.22) | 0 | <0.00001 |
| Re-operation rate within 2 years | 3 | 869 | 28/477 | 138/392 | 0.19 (0.13, 0.27) | 0 | <0.00001 |
| Re-operation rate >10 years | 2 | 371 | 39/223 | 67/148 | 0.44 (0.31, 0.62) | 0 | <0.00001 |
| Total revision rate - RR | 7 | 1838 | 33/907 | 314/931 | 0.11 (0.08, 0.16) | 35 | <0.00001 |
| Revision rate within 1 year | 2 | 327 | 16/206 | 31/121 | 0.29 (0.16, 0.52) | 30 | <0.00001 |
| Revision rate within 2 years | 2 | 502 | 5/297 | 39/205 | 0.08 (0.03, 0.21) | 0 | <0.00001 |
| Revision rate >10 years | 2 | 555 | 16/272 | 112/283 | 0.15 (0.09, 0.25) | 8 | <0.00001 |
| Total complication rate - RR | 5 | 1415 | 177/742 | 294/673 | 0.56 (0.38, 0.80) | 76 | <0.01 |
| Total patients with pain - RR | 4 | 776 | 53/423 | 105/353 | 0.31 (0.23, 0.41) | 30 | <0.00001 |
| Patients with pain within 1 year | 2 | 551 | 97/409 | 69/317 | 0.50 (0.07, 3.55) | 0 | 0.16 |
| Patients with pain within 2 years | 3 | 869 | 23/339 | 39/338 | 0.70 (0.37, 1.34) | 0 | <0.05 |
| Patients with pain >10 years | 2 | 371 | 47/223 | 73/148 | 0.83 (0.32, 2.17) | 38 | <0.00001 |
| Infection rate - RR | 6 | 1598 | 36/832 | 30/766 | 1.06 (0.66, 1.71) | 15 | 0.81 |
| Infection rate within 1 year | 2 | 551 | 1/367 | 1/184 | 0.50 (0.07, 3.55) | 0 | 0.49 |
| Infection rate within 2 years | 3 | 869 | 14/477 | 20/392 | 0.70 (0.37, 1.34) | 0 | 0.28 |
| Infection rate >10 years | 2 | 371 | 10/223 | 7/148 | 0.83 (0.32, 2.17) | 0 | 0.7 |
| Deep vein thrombosis rate - RR | 4 | 1100 | 7/545 | 12/555 | 0.64 (0.27, 1.51) | 0 | 0.31 |
| Harris score within 1 year - WMD | 2 | 589 | NA/290 | NA/299 | 6.93 (4.33, 9.53) | 0 | <0.00001 |
| Harris score within 2 years - WMD | 2 | 589 | NA/290 | NA/299 | 3.60 (0.73, 6.47) | 0 | <0.05 |
| Operation time - WMD | 3 | 878 | NA/435 | NA/443 | 19.66 (15.44, 23.87) | 58 | <0.00001 |
| Blood loss - SMD | 2 | 677 | NA/339 | NA/338 | 1.87 (1.69, 2.05) | 0 | <0.00001 |
| Hospital stay -WMD | 3 | 558 | NA/323 | NA/235 | 1.09 (0.46, 1.73) | 25 | <0.01 |
AR: Arthroplasty; IF: Internal fixation; RR: Risk ratio; SMD: Standardized mean difference; WMD: Weighted mean difference; NA: Not applicable; CI: Confidence interval.