Osteoporosis Self-Assessment Tool (OST)
Osteoporosis Self-assessment Tool (Koh LK, et al. Osteoporos Int 2001) = (weight kg - age years) x 0.2 truncated to an integer; > -1 low, -1 to -4 moderate, < -4 high risk of low bone mineral density.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Weight
- 55 kg
- Age
- 70 years
Result: Osteoporosis self-assessment index -3 — moderate risk (-1 to -4) of low bone density.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- > -1
- Low risk.
- -1 to -4
- Moderate risk.
- < -4
- High risk of low bone density ((weight - age) x 0.2). A prompt for BMD testing, not a diagnosis.
What you enter
- Weight
- Age
How this is calculated
Koh LKH, Sedrine WB, Torralba TP, et al. A simple tool to identify Asian women at increased risk of osteoporosis (OST/OSTA). Osteoporos Int. 2001;12(8):699-705. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.