Osteoporosis Risk Estimator

This tool estimates osteoporosis risk using four established screening methods, recognizing that no single method performs equally well across all populations. For most individuals, it uses OST (Osteoporosis Self-Assessment Tool). For individuals of East Asian descent, such as Chinese, Japanese, or Korean, it uses OSTA (Osteoporosis Self-Assessment Tool for Asians), which was developed specifically for that population. In addition, the tool applies a second sex-specific screening method: MORES (Male Osteoporosis Risk Estimation Score) for males and SCORE (Simple Calculated Osteoporosis Risk Estimation) for females.

Note: This tool is provided for informational and educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Results should not be interpreted as medical advice. Users are encouraged to consult a qualified healthcare professional for evaluation and guidance specific to their individual circumstances.

How this estimator works

The first score depends on ethnicity. For Asian users, this calculator uses OSTA, calculated as (weight in kg − age in years) / 5, with the result truncated to an integer. For non-Asian users, it uses OST, calculated as (weight in lbs − age in years) / 5, then truncated to an integer.

The second score is sex-specific. SCORE is for women and uses ethnicity, fracture history, rheumatoid arthritis, prior estrogen use, age, and weight. MORES is for men and uses age, weight, and COPD. Given their complexity, the actual formulas are not described here. However, they can be found here instead: OST, OSTA, SCORE and MORES.