Relationship of Navicular Bone Drop with Increased Body Mass Index

Background: Increased navicular bone drop is associated with increased BMI in adults. Objective: To evaluate the relationship of navicular bone drop with body mass index (BMI). Material and Methods: A cross sectional study design was used with one hundred participants included as a sample from the University of Lahore (Gujrat campus). The participants were considered into four categories on the basis of their BMI values as underweight, normal, overweight and the obese. The navicular drop was calculated by using the navicular drop test. Mean, standard deviation and Pearson correlation coefficient were calculated. Data was analyzed by using SPSS version 21. Results: Total participants were 200. Among them 102 were females and 98 subjects were males. The mean and standard deviation of age was 24±3.2 and BMI was 23±5.3. The mean navicular drop values were 8.3±3.3. Regarding to different types of BMI, navicular drop has been observed. About 24% navicular drop was seen in underweight, 43% in normal, 40% in overweight and about 90 % in obese subjects. A positive but weak to moderate correlation was found between the BMI and the navicular drop test. The Pearson correlation coefficient value was (r=0.359 p=0.00). The navicular drop test is reproducible and has excellent reliability Conclusion: The present study found that there was a direct and positive correlation between the Body Mass Index and the navicular bone drop.