# Proximal Hip Fracture: Does Canal Width Matter?

## TL;DR

This study finds that canal width in hip X-rays can predict whether a fracture is trochanteric or sub-capital, with wider canals linked to trochanteric fractures.

## Contribution

The study identifies the calcar-to-canal ratio (CCR) as a novel predictive morphological parameter for proximal hip fracture types.

## Key findings

- CCR was significantly associated with trochanteric fractures (p = 0.001).
- CCR showed high reliability with ICC values of 0.791 and 0.770.
- Logistic regression predicted 60.4% of fracture types correctly using CCR.

## Abstract

Background/Objectives: Proximal femur fractures are common in the older population and are related to bone quality. Our work evaluates bone parameters from pelvic anteroposterior (AP) radiographs in patients with trochanteric and sub-capital fractures to determine if there are predictive morphology parameters for each fracture type. Methods: Data from 237 medical records were extracted from patients who arrived at our hospital with trochanteric and sub-capital femoral fractures. Descriptive data and radiological evaluation of the calcar-to-canal ratio (CCR), cortical thickness index (CTI), and Dorr classification were measured by two observers and statistically evaluated. Results: A total of 202 patients were found to be eligible for the study. The mean patient age was 81.41 ± 7.27 years old. The mean age of the trochanteric group was significantly higher than that of the sub-capital group (p = 0.005). There were no statistically significant differences in gender and comorbidities. The CCR showed significance, but the CTI and Dorr classification did not show a significant difference (p = 0.001, p = 0.78, and p = 0.98). A high degree of reliability was shown for all measurements. The ICC for CTI and CCR was p = 0.791 and p = 0.770 (p < 0.001), and Cronbach’s alpha was 0.815 and 0.796, respectively. Logistic regression was found to be significant in predicting 60.4% of correct forecasts with an odds ratio of 0.011 and 95% confidence interval (p = 0.001). For CTI, the correct forecasting rate was 48%, with an odds ratio of 0.615 (p = 0.78). Conclusions: We found that, out of the measured parameters, the CCR stood out as important, showing that higher CCR levels are linked to an increased likelihood of trochanteric fractures.