OST / ORAI Osteoporosis DXA Pre-Screen
OST and ORAI osteoporosis DXA pre-screen indices from age, weight, and current estrogen use.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 60 years
- Weight
- 72 kg
- Currently using estrogen
- No
Result: OST index 2 -- lower risk (Caucasian cutoff < 2; original OSTA tier: low (OSTA index > -1)). ORAI 7 of 26 -- below the ORAI referral threshold.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- OST < 2
- Increased risk in Caucasian populations; consider DXA.
- ORAI >= 9
- Selects for bone densitometry (DXA).
What you enter
- Age
- Weight
- Currently using estrogen
How this is calculated
Koh LKH, et al. A simple tool to identify Asian women at increased risk of osteoporosis (OST). Osteoporos Int. 2001;12(8):699-705; with Cadarette SM, et al. Osteoporosis Risk Assessment Instrument (ORAI). CMAJ. 2000;162(9):1289-1294. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.