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OSTA Osteoporosis Risk Calculator (Koh 2001)
x402
OSTA Osteoporosis Risk Calculator (Koh 2001) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Computes the Osteoporosis Self-Assessment Tool for Asians (OSTA) index and risk category (low, intermediate, high) from patient age and weight
Price / call$0.005
Success—
StatusUnknown
How this service works
Koh 2001 Osteoporosis Self-Assessment Tool for Asians (OSTA). Index = trunc(0.2 × (weight_kg − age)) toward zero. Risk low if index > −1, intermediate if −1 through −4, high if index < −4. Age 18–120; weight_kg or weight_lb. Not a medical device, not FRAX, not a DXA order. Derivation was postmenopausal Asian women.
Output
Returns the numeric OSTA index (truncated toward zero from 0.2 × (weight_kg − age)) and a categorical risk level: low (index > −1), intermediate (index −1 through −4), or high (index < −4). Not a DXA order, not FRAX, and not validated outside postmenopausal Asian women.
Example use cases
Postmenopausal clinic risk triage
“I have a 72-year-old Asian woman in clinic who weighs 48 kg — can you calculate her OSTA index and tell me her osteoporosis risk category?”
Population health screening workflow
“For our osteoporosis screening program, run the OSTA calculator for a 65-year-old patient weighing 130 pounds and give me the risk level.”
EHR-integrated bone health flag
“Before ordering a DXA, can you check the OSTA score for my 59-year-old patient at 55 kg to see if she qualifies as intermediate or high risk?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/ostaWhen to prefer
Use this endpoint when you need a fast, validated, formulaic osteoporosis pre-screen based solely on age and weight for postmenopausal Asian women, following the Koh 2001 OSTA derivation. Prefer this over FRAX when bone mineral density data and fracture history are unavailable and a simple two-variable index suffices. Not appropriate for men, non-Asian populations, or as a substitute for DXA imaging.
Side effects
- Missing required 'age' parameter returns a validation error
- Age outside 18–120 range may be rejected or return an error
- Neither weight_kg nor weight_lb provided leads to incomplete calculation
- Non-integer age value may cause schema validation failure
- Network or payment (x402) failure if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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