Correlation and Development of A Maximum Bite Force Prediction Model Based on Handgrip Force and BMI in Young Healthy Adults

Objectives To examine the associations among handgrip force (HF), maximum bite force (MBF) and body mass index (BMI) in individuals of the same age group across both genders. It also explores the laterality correlation between MBF and HF. Furthermore, to establish a simple approach for clinical MBF assessment, we aimed to develop a predictive model for MBF. Methods In this cross‐sectional study, 102 healthy young adults (51 males, 51 females) underwent MBF measurement via a dental bite force tester and HF via a digital dynamometer. BMI was calculated from height and weight. Spearman's correlation assessed variable relationships and laterality patterns; gender differences were analysed using Mann–Whitney U tests. A multiple regression model was constructed to predict MBF. Results MBF and HF were significantly correlated in both genders ( p < 0.01). BMI showed a stronger influence on MBF and HF in females ( p < 0.01). Laterality correlations between HF and MBF were also stronger in females. Males exhibited higher HF and BMI ( p < 0.01), while MBF showed no significant gender difference ( p = 0.536). Conclusion HF and BMI are strong predictors for MBF. The developed predictive model offers a practical and objective tool for MBF assessment in healthy young adults. Clinical Relevance This model provides a simple, reliable method for clinical evaluation of MBF. Trial Registration: ChiCTR2500097064.