Table 2 Patient characteristics at baseline between cohorts
Variable | Uncemented THA (n = 116) | Hybrid THA (n = 120) | P-value |
|---|---|---|---|
Age (years) | |||
Median (range) | 66.4(65–71) | 66.7(65–72) | 0.206 |
Sex, no. % | 0.909 | ||
Female | 55(47.4) | 56(46.7) | |
Male | 61(52.6) | 64(53.3) | |
BMI (kg/m2) | |||
Median (range) | 24.5(16.7–31.3) | 24.2(16.1–32.8) | 0.325 |
BMD | -3.61 ± 0.72 | -3.64 ± 0.76 | 0.281 |
Side, no.% | 0.443 | ||
Right | 58(50.0) | 54(45.0) | |
Left | 58(50.0) | 66(55.0) | |
Hip condition prior to conversion, no.% | 0.869 | ||
Symptomatic | 66(56.9) | 67(55.8) | |
asymptomatic | 50(43.1) | 53(44.2) | |
Femoral head size (mm), no. % | 0.945 | ||
28 | 23(19.8) | 26(21.7) | |
32 | 44(37.9) | 41(34.1) | |
36 | 49(42.2) | 53(44.2) | |
IHFs, AO/OTA, no. % | 0.543 | ||
31A1 | 48(41.4) | 45(37.5) | |
31A2 | 68(58.6) | 75(62.5) | |
Charlson comorbidity index at surgery, no. % | 0.717 | ||
Low | 42(36.2) | 45(37.5) | |
Medium | 57(49.1) | 60(50.0) | |
High | 17(14.7) | 15(12.5) | |
Reasons for conversion, no. % | 0.459 | ||
Instability | 55(47.4) | 63(52.5) | |
Mechanical failure | 45(38.8) | 42(35.0) | |
Both | 16(13.8) | 15(12.5) | |
Conversion interval (years) | 0.644 | ||
< 2 | 74(63.8) | 80(66.7) | |
≥ 2 | 42(36.2) | 40(33.3) | |
Follow-up (months) | |||
Median (range) | 120.2(102–127) | 120.1(101–127) | 0.219 |