Calculator Inputs
Enter realistic values. This tool estimates screening priority, not fracture probability or treatment need.
Example Data Table
| Profile | Age | Weight | Height | OST Score | Risk Flags | Typical Output |
|---|---|---|---|---|---|---|
| Postmenopausal woman with fracture history | 68 | 52 kg | 160 cm | -3 | 5 | Screening Recommended |
| Postmenopausal woman with moderate factors | 59 | 63 kg | 165 cm | 0 | 2 | Higher Screening Priority |
| Premenopausal woman with few factors | 42 | 70 kg | 167 cm | 5 | 0 | Lower Current Screening Priority |
| Man with multiple risk factors | 71 | 61 kg | 172 cm | -2 | 4 | Clinical Review Advised |
Formula Used
1) Body Mass Index: BMI = weight in kilograms ÷ height in meters².
2) OST screening score: OST = 0.2 × (weight in kg − age in years), then truncated to an integer.
3) Educational profile points: Additional points are added for recognized clinical factors such as low body size, smoking, heavy alcohol use, rheumatoid arthritis, glucocorticoids, parental hip fracture, prior fragility fracture, inactivity, and low calcium or vitamin D intake.
Interpretation: The OST result is shown beside an educational risk-flag summary. The combined output helps estimate screening priority, but DXA testing and clinician review remain the definitive next steps.
How to Use This Calculator
- Enter age, sex, weight, and height.
- Select menopause status when relevant.
- Mark each risk factor as yes or no.
- Press Calculate Risk Score to display the result above the form.
- Review the OST score, BMI, risk-flag count, and screening tier.
- Use the CSV or PDF buttons to save the displayed summary.
- Discuss elevated results, fractures, or medication-related risks with a clinician.
Frequently Asked Questions
1) Does this calculator diagnose osteoporosis?
No. It estimates screening priority using a simple age and weight formula plus recognized clinical factors. Diagnosis still requires medical evaluation, usually with DXA bone density testing.
2) What does the OST score represent?
The OST score is a quick screening index derived from age and body weight. Lower values suggest greater screening priority, especially in postmenopausal women.
3) Why is BMI included?
Lower body size is associated with higher osteoporosis risk. BMI gives added context beyond raw body weight and helps explain why leaner users may receive higher screening priority.
4) Can men use this tool?
Yes, but routine screening guidance for men is less certain. The calculator can still highlight risk factors and support a discussion with a clinician.
5) Which factors usually raise risk?
Common factors include older age, postmenopausal status, low body weight, smoking, heavy alcohol use, glucocorticoids, rheumatoid arthritis, prior fragility fracture, and family history of hip fracture.
6) Why is fracture history important?
A low-trauma fracture after age 50 can signal weakened bone strength. It often raises concern even before formal bone density testing is performed.
7) When should someone seek clinical screening?
Women 65 or older should generally be screened. Postmenopausal women under 65 with risk factors should discuss earlier screening. Men with several risk factors also warrant review.
8) Are the CSV and PDF files medical reports?
No. They are convenience exports of your entered result summary. They can support record keeping, but they are not official clinical documents.