Evaluation of proximal femoral geometry and its relationship with body mass index in Iranian people: a cross sectional study.

Introduction: There are several studies on the angle of the femoral neck in different countries. It seems that data of diverse races might help the prediction of femoral neck fractures. The present study aimed to evaluate the femoral neck-shaft angle (FNSA) as a predictive factor of neck fracture in Iranian people.

Methods: In this cross-sectional study, the FNSA was measured using radiographs in 635 patients referred to Poursina Hospital in Rasht from September 2018 to October 2019. The body mass index (BMI) was calculated, age and sex of patients were recorded. Data were analyzed by SPSS. The level of statistical significance was adjusted to P<0.05.

Results: According to the measured variables, gender, age, BMI and right FNSA are significant in the way that participants with normal BMI have higher FNSA. FNSA decreased with age and height. Obese people had lower FNSA than normal and overweight people. Comparison of left and right angles using the Wilcoxon test showed a statistically significant difference (P<0.001). The right side FNSA was more than the left (59.94%). Only in 39.9%, the left FNSA was more than the right, and in 0.15% both were the same.

Conclusion: The present cross-sectional study shows a significant relationship between BMI and FNSA. It is suggested that physician evaluates these parameters for prediction of fracture risk in individuals.