Table 1.
Data for the 2,000 patients who were operated either before or after implementation of the algorithm
| Before algorithm | After algorithm | ||||
|---|---|---|---|---|---|
| n | % | n | % | p-value | |
| No. of patients | 1,000 | 1,000 | |||
| Age (years) a | 83 (76–89) | 83 (74–89) | 0.7 | ||
| Female gender | 749 | 742 | 0.7 | ||
| ASA score III–IV | 517 | 291 | < 0.001 | ||
| Prefracture NMS 0–5 | 530 | 434 | < 0.001 | ||
| Low cognitive function | 297 | 287 | 0.6 | ||
| Dead within 1 year b | 307 | 306 | 0.6 | ||
| Reoperations within 1 year | 180 | 100 | 124 | 100 | < 0.001 |
| Hematoma/Bleeding | 3 | 2 | 3 | 2 | |
| Infection | 26 | 15 | 11 | 9 | |
| Dislocation of prosthesis | 20 | 11 | 21 | 17 | |
| Loosening of prosthesis | 6 | 3 | 2 | 2 | |
| Periprosthetic fracture | 25 | 14 | 12 | 10 | |
| Avascular necrosis of femoral head | 8 | 4 | 5 | 4 | |
| Nonunion | 51 | 28 | 37 | 29 | |
| Cutout of implant into hip joint | 23 | 13 | 15 | 12 | |
| Fracture around the implant | 8 | 5 | 9 | 7 | |
| Distal locking screw position | 2 | 1 | 2 | 2 | |
| Subsequent osteoarthritis | 2 | 1 | 1 | 1 | |
| Implant removal due to pain/discomfort | 6 | 3 | 6 | 5 | |
Values are presented as number of patients and were analyzed using the chi-square test, except for:
a Age, presented as median (interquartile range) and analyzed using Mann-Whitney test.
b Dead within 1-year, analyzed using Kaplan-Meier test.
ASA: American Society of Anaesthesiologists; NMS: New Mobility score.