Table 4.
Univariate analysis of 7 variables in relation to survival data at 14 years after the index fracture (n = 486)1
| Variable | Negative | Positive | Total | LR | 95% CI | Statistic |
|---|---|---|---|---|---|---|
| Sex | ||||||
| Male | 30 | 126 | 156 | 0.63 | 0.39–1.01 | |
| Female | 33 | 297 | 330 | 1.34 | 0.86–2.09 | χ2 = 8.00, p < 0.01 |
| Age | ||||||
| –59 | 27 | 20 | 47 | 0.11 | 0.06–0.19 | |
| 60–64 | 8 | 10 | 18 | 0.19 | 0.08–0.45 | |
| 65–69 | 8 | 19 | 27 | 0.35 | 0.15–0.82 | |
| 70–74 | 7 | 25 | 32 | 0.53 | 0.22–1.27 | |
| 75–79 | 9 | 64 | 73 | 1.06 | 0.51–2.20 | |
| 80–84 | 3 | 116 | 119 | 5.76 | 2.02–16.4 | |
| 85– | 1 | 169 | 170 | 25.17 | 6.51–97.3 | Wx = 9.84, p < 0.0001 |
| ASA class | ||||||
| 1 | 10 | 3 | 13 | 0.05 | 0.02–0.12 | |
| 2 | 27 | 73 | 100 | 0.40 | 0.24–0.67 | |
| 3 | 24 | 283 | 307 | 1.76 | 1.08–2.86 | |
| 4 | 2 | 64 | 66 | 4.77 | 1.29–17.56 | Wx = 6.00, p < 0.0001 |
| BMI (kg/m2)2 | ||||||
| –19.99 | 2 | 61 | 63 | 4.54 | 1.22–16.87 | |
| 20–24.99 | 24 | 150 | 174 | 0.93 | 0.56–1.54 | |
| 25–29.99 | 17 | 76 | 93 | 0.67 | 0.37–1.20 | |
| 30– | 6 | 24 | 30 | 0.60 | 0.24–1.50 | |
| Missing | 14 | 112 | 126 | 1.19 | 0.65–2.20 | χ2 = 7.45, n.s |
| Fracture type | ||||||
| S72.0 | 36 | 248 | 284 | 1.03 | 0.67–1.57 | |
| S72.1 | 22 | 155 | 177 | 1.05 | 0.63–1.75 | |
| S72.2 | 5 | 20 | 25 | 0.60 | 0.22–1.63 | χ2 = 1.16, n.s |
| Operative method | ||||||
| NFB20 | 23 | 213 | 236 | 1.38 | 0.83–2.28 | |
| NFJ52 | 19 | 128 | 147 | 1.00 | 0.83–1.22 | |
| NFJ54 | 9 | 44 | 53 | 0.73 | 0.34–1.56 | |
| NFJ50 | 11 | 15 | 26 | 0.20 | 0.10–0.43 | |
| NFB10 | 0 | 21 | 21 | 5.00 | 0.57–43.5 | |
| NFB30-50 | 1 | 2 | 3 | 0.30 | 0.03–2.90 | χ2 = 21.67, p < 0.001 |
| Comorbidity | ||||||
| None | 41 | 239 | 280 | 0.87 | 0.57–1.33 | |
| Alcohol involvement | 13 | 26 | 39 | 0.30 | 0.15–0.59 | |
| Alzheimer’s disease | 1 | 48 | 49 | 7.15 | 1.28–39.9 | |
| Dementia | 1 | 62 | 63 | 9.23 | 1.78–47.9 | |
| Previous stroke | 4 | 33 | 37 | 1.23 | 0.42–3.57 | |
| Other | 3 | 15 | 18 | 0.75 | 0.21–2.63 | χ2 = 23.70, p < 0.001 |
LR, likelihood ratio; χ2, chi-squared test; Wx, Wilcoxon rank test; ASA, American Society of Anesthesiologists; BMI, body mass index; S72.0, femoral neck fracture; S72.1, pertrochanteric fracture; S72.2, subtrochanteric fracture; NFB20, cemented hemiarthroplasty; NFJ52, osteosynthesis with dynamic hip screws or Medoff plate; NFJ54, osteosynthesis with intramedullary nail; NFJ50, osteosynthesis with cannulated screws; NFB10, uncemented hemiarthroplasty; NFB30-50, uncemented, hybrid, cemented total arthroplasty
1All classes of the variables are compared with each other within the variable
2BMI < 20 kg/m2 vs BMI ≥ 20 kg/m2 (missing cases excluded); Fisher’s exact p = 0.00089