Table 4 Comparison between unipolar (Austin Moore) hemiarthroplasty and bipolar hemiarthroplasty
Total N = 99 | Unipolar | Bipolar | p-value |
|---|---|---|---|
n = 24 | n = 75 | ||
Age (year) | |||
< 80 | 0(0) | 56(74.7) | 0.001*** |
≥ 80 | 24(36.7) | 19(25.3) | |
Gender | |||
Male | 20(83.3) | 37(49.3) | 0.003** |
Female | 4(16.7) | 38(50.7) | |
BMI (kg/m2) | |||
≤ 18.5 | 5(25.0) | 8(12.9) | 0.51 |
> 18.5–25 | 11(55.0) | 36(58.1) | |
> 25–30 | 3(15.0) | 16(25.8) | |
> 30–40 | 1(5.0) | 2(3.2) | |
ASA Classification | |||
Type 2 | 8(33.3) | 24(32.0) | 0.985 |
Type 3 | 10(41.7) | 31(41.3) | |
Type 4 | 6(25) | 20(26.7) | |
Surgical Approach | |||
Anterolateral (Watson-Jones) | 16(66.7) | 48(64.0) | 0.812 |
Posterior (Moore/ Southern) | 8(33.3) | 27(36.0) | |
Cup Size (mm) | |||
≤ 45 | 3(13.0) | 29(39.2) | 0.066 |
45–50 | 10(43.5) | 22(29.7) | |
≥ 50 | 10(43.5) | 23(31.1) | |
Primary to Second Surgery (year) | |||
0.5y | 5(20.8) | 29(38.7) | 0.08 |
1y | 1(4.2) | 12(16.0) | |
2y | 7(29.2) | 12(16.0) | |
≥ 3y | 11(45.8) | 22(29.3) | |
Reasons of Failed Hemiarthroplasty | |||
Acetabulum Wearing | 8(33.3) | 22(29.3) | 0.986 |
Femoral Stem Subsidence | 5(20.8) | 19(25.3) | |
Recurrent Dislocation | 2(8.3) | 5(6.7) | |
Periprosthetic Fracture | 5(20.8) | 17(22.7) | |
Infection | 4(16.7) | 12(16.0) | |