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Osteoporosis Risk Score Calculator (OST)

Health & Fitness

Calculate the OST (Osteoporosis Self-Assessment Tool) score, a simple weight-and-age-based osteoporosis risk screen.

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30 kg200 kg
years
18 years100 years

OST Score

1.0

OST score. Educational reference only, not a substitute for clinical judgment or a bone density scan.

Risk Category

Moderate risk

General osteoporosis risk category using sex-specific thresholds.

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Calculator Stats

Odeh Ahwal

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Odeh Ahwal
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Frequently Asked Questions

What is the OST score used for?

OST (Osteoporosis Self-Assessment Tool) is a simple screening formula using only weight and age to estimate osteoporosis risk, intended to help identify who may benefit from a formal bone density (DXA) scan.

Why does higher weight lower the OST risk score in this formula?

Higher body weight is associated with greater mechanical loading on bone, which tends to be protective against osteoporosis, so the formula subtracts age from weight, with higher results indicating lower risk.

How accurate is OST compared to a bone density scan?

OST is a quick screening estimate, not a diagnostic test. A formal DXA (bone density) scan remains the gold standard for actually diagnosing osteoporosis.

Is this calculator a substitute for medical advice?

No. This is an educational reference implementation of the OST screening formula, not a substitute for a physicians clinical assessment or a bone density scan.

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