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Duke Activity Status Index (DASI) Calculator
x402
Duke Activity Status Index (DASI) Calculator 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 Hlatky 1989 Duke Activity Status Index score and estimated peak VO2 from 12 yes/no functional activity questions
Price / call$0.005
Success—
StatusUnknown
How this service works
Hlatky 1989 Duke Activity Status Index. Twelve caller-assigned yes/no items (self-care through strenuous sports); Yes adds the Table I weight, No adds 0. Light housework is 2.70. DASI is the sum (0-58.2). Estimated peak VO2 mL/kg/min = 0.43 x DASI + 9.6. magent does not observe the patient. Not a functional-capacity assignment or exercise-test replacement.
Output
Returns the total DASI score (range 0–58.2) as the sum of weights for all 'yes' answers across the 12 activity items, and an estimated peak VO2 in mL/kg/min computed as 0.43 × DASI + 9.6.
Example use cases
Preoperative cardiac risk screening
“I need to compute the DASI score for a pre-op patient: they can do self-care, walk indoors, walk a block or two, and do light housework, but cannot climb stairs, run, do heavy housework, do yardwork, have sexual relations, do moderate recreation, or play strenuous sports. What's their DASI and estimated peak VO2?”
Chronic heart failure functional assessment
“My heart failure patient can do self-care, walk indoors, walk a few blocks, climb stairs, and do light and moderate housework, but can't run, do heavy housework, do yardwork, have sexual relations, do moderate recreation, or play strenuous sports — can you calculate their Duke Activity Status Index score?”
Post-cardiac rehab progress tracking
“A patient finishing cardiac rehab now says yes to self-care, walking indoors, walking blocks, climbing stairs, light housework, moderate housework, yardwork, sexual relations, and moderate recreation, but still can't run or play strenuous sports — please calculate their DASI score and estimated peak VO2 so we can compare to baseline.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/dasiWhen to prefer
Use this endpoint when you need a validated, guideline-referenced estimate of functional capacity (DASI score and VO2 peak) from structured yes/no activity data without conducting an exercise stress test. It is ideal for preoperative cardiac risk screening, heart failure monitoring, or any scenario where the 12 Hlatky 1989 activity items have been collected from a patient interview or questionnaire.
Side effects
- Missing any of the 12 required boolean query parameters returns a validation error
- Non-boolean values for activity parameters cause a schema validation failure
- Network or server errors return standard HTTP 4xx/5xx responses
- Score may not reflect true functional capacity if caller-reported answers are inaccurate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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