Group | Early fixation failure (≤3 months, n = 40) | P-value | Late fixation failure (> 3 months, n = 35) | P-value | ||
---|---|---|---|---|---|---|
Stem type | Primary stem (n = 16) | Revision stem (n = 24) | Primary stem (n = 22) | Revision stem (n = 13) | ||
Age (years) | 81.1 ± 6.6 (67–96) | 80.3 ± 6.0 (70–91) | 0.946 | 77.2 ± 14.5 (32–96) | 78.8 ± 9.6 (64–94) | 0.827 |
Sex | ||||||
Female | 6 (37%) | 18 (75%) | 0.018 | 10 (45%) | 8 (62%) | 0.358 |
Male | 10 (63%) | 6 (25%) | 12 (55%) | 5 (38%) | ||
Body mass index | 22.9 ± 3.6 (18.1–30.3) | 24.7 ± 4.0 (19.2–33.7) | 0.240 | 24.1 ± 5.7 (16.4–40.3) | 24.7 ± 5.0 (18.6–32.7) | 0.781 |
ASA | 0.433 | 0.517 | ||||
1 | 0 | 0 | 2 (9%) | 0 | ||
2 | 8 (50%) | 15 (63%) | 13 (59%) | 9 (69%) | ||
3 | 8 (50%) | 9 (37%) | 7 (32%) | 4 (31%) | ||
Charlson comorbidity index | 0.814 | 0.545 | ||||
2 | 0 | 0 | 3 (14%) | 0 | ||
3 | 2 (13%) | 3 (13%) | 0 | 1 (8%) | ||
4 | 5 (31%) | 7 (29%) | 3 (14%) | 4 (30%) | ||
5+ | 9 (56%) | 14 (58%) | 16 (72%) | 8 (62%) | ||
Bone mineral density, T-score | −3.0 ± 0.9 (−2.4- -4.0) | −3.1 ± 0.8 (−2.6- -3.8) | 0.752 | −3.1 ± 0.9 (−2.5- -3.7) | −3.0 ± 0.9 (−2.6- -3.7) | 0.898 |
Interval from index procedure and hip arthroplasty (months) | 2(IQR:1) (1–3) | 1(IQR:1) (1–3) | 0.073 | 12.5(IQR:12) (4–72) | 9(IQR:12) (4–87) | 0.987 |
Index procedure | 0.177 | 0.277 | ||||
Cephalomedullary Nail | 3 (19%) | 10 (42%) | 5 (23%) | 6 (46%) | ||
Plate | 13 (81%) | 14 (58%) | 17 (77%) | 7 (54%) | ||
Surgery duration (mins) | 113.9 ± 39.6 (60–180) | 121.3 ± 46.0 (60–240) | 0689 | 114.7 ± 43.7 (60–215) | 118.8 ± 71.4 (60–300) | 0.600 |
Intraoperative blood loss (ml) | 700.0 ± 424.3 (400–1000) | 650.0 ± 295.8 (300–1000) | 0.898 | 508.3 ± 426.3 (100–1500) | 670.0 ± 495.7 (250–1450) | 0.506 |
Length of stay (days) | 8(IQR:3) (4–94) | 7.5(IQR:10) (2–83) | 0.988 | 7(IQR: 3) (5–17) | 7(IQR:2) (2–19) | 0.674 |
Follow-up duration (months) | 132.0 ± 53.1 (53–229) | 112.3 ± 63.0 (13–207) | 0.304 | 122.3 ± 67.2 (27–234) | 92 ± 59.5 (22–186) | 0.234 |