Table 2.
Patient characteristics at baseline
| Variable | CTHR (n = 120) |
|---|---|
| Age (years), No.% | |
| 30 ≤, < 45 | 45(37.5) |
| 45 ≤, < 60 | 75(62.5) |
| Sex, No. % | |
| Male | 67(55.8) |
| Female | 53(44.2) |
| BMI (kg/m2) | |
| Mean (range) | 26.8 (18.3–38.2) |
| BMD | −3.76 ± 0.82 |
| Autogenous iliac bone grafts, No.% | |
| Yes | 63(52.5) |
| No | 57(47.5) |
| Type of prior fractures, No.% | |
| Femoral neck fractures | |
| Subcapital | 12(10.0) |
| Transcervical | 24(20.0) |
| Base neck | 19(15.8) |
| Intertrochanteric fractures (Evans-Jensen classification) | |
| Type I | 8(6.7) |
| Type II | 13(10.8) |
| Type III | 21(17.5) |
| Type IV | 18(15.0) |
| Type V | 5(4.2) |
| Prosthesis types of prior fixation failures, No.% | |
| PFNAa (femoral neck fractures and intertrochanteric fractures) | |
| Base neck | 19(15.8) |
| Type I | 2(1.6) |
| Type II | 3(2.5) |
| Type III | 10(8.3) |
| Type IV | 8(6.6) |
| Type V | 3(2.5) |
| Three hollow screwsb (femoral neck fractures) | |
| Subcapital | 12(10.0) |
| Transcervical | 24(20.0) |
| DHSb (intertrochanteric fractures) | |
| Type I | 1(0.8) |
| Type II | 3(2.5) |
| Type III | 11(9.1) |
| Type IV | 10(8.3) |
| Type V | 2(1.6) |
| Titanium platec plus screwsb (intertrochanteric fractures) | |
| Type I | 5(4.2) |
| Type II | 7(5.8) |
| Time to conversion (mos), No.% | |
| < 3 | 78(65.0) |
| ≥ 3 | 42(35.0) |
| Femoral head size (mm), No.% | |
| 28 | 42(35.0) |
| 32 | 48(40.0) |
| 36 | 30(25.0) |
| CCI at conversion, No. % | |
| Low | 59(49.2) |
| Medium | 43(35.8) |
| High | 18(15.0) |
| Indications for CTHR revision, No. % | |
| Instability | 66(55.0) |
| Mechanical failure | 35(29.2) |
| Both | 19(15.8) |
| ASA physical status, No.% | |
| 1 | 35(29.2) |
| 2 | 63(52.5) |
| 3 | 22(18.3) |
| HHS prior to conversion | 51.5 ± 14.1 |
| Follow-up (years) | |
| Median (range) | 10.2(8–12) |
CTHR cemented total hip replacement, BMI body mass index, BMD bone mineral density, PFNA proximal femoral nail antirotation, DHS dynamic hip screw, CCI Charlson comorbidity index, ASA American Society of Anesthesiologists, HHS Harris hip scores
aSmith & Nephew, Memphis, Tennessee
bDouble Medical, Xiamen, China
cSynthes, West Chester, PA, USA