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Enright 1998 Six-Minute Walk Distance Calculator
x402
Enright 1998 Six-Minute Walk Distance 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).
Calculates predicted six-minute walk distance (meters) and lower limit of normal using the Enright 1998 equations, with optional percent-predicted from an actual walked distance
Price / call$0.005
Success—
StatusUnknown
How this service works
Enright 1998 predicted six-minute walk distance (meters) from sex, age 40-80, height_cm, and weight_kg (Table 3 height/weight: male 7.57H−5.02age−1.76W−309; female 2.11H−2.29W−5.78age+667). Reports predicted_m and lln_m (minus 153 m men or 139 m women). Optional walked_m (0-1500) yields percent_predicted. Not a timed walk, BMI-equation path, or 80%/400 m class. Not a medical device.
Output
Returns predicted_m (the Enright 1998 predicted six-minute walk distance in meters for the given sex, age, height, and weight), lln_m (lower limit of normal: predicted minus 153 m for males or 139 m for females), and optionally percent_predicted (walked_m divided by predicted_m times 100) when walked_m is supplied.
Example use cases
Pre-cardiac rehab functional baseline
“I have a 72-year-old female patient entering cardiac rehab — she's 162 cm tall and weighs 74 kg. What's her Enright-predicted 6-minute walk distance and the lower limit of normal so I can document her baseline?”
Post-treatment progress check
“My 58-year-old male patient is 180 cm and 90 kg. He walked 520 meters on today's 6-minute walk test. Can you tell me his predicted distance and what percent predicted his result is using the Enright 1998 formula?”
Pulmonary clinic reference range lookup
“For a 64-year-old woman who is 5 feet 5 inches tall and 155 pounds, what does the Enright 1998 equation say her predicted 6-minute walk distance should be, and what's the lower limit of normal?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/6mwdWhen to prefer
Use this endpoint when you need the Enright 1998 Table 3 sex-specific linear regression prediction for 6-minute walk distance (not a BMI-based equation, not a general fitness score, and not a timed-walk cutoff classifier). Prefer this over generic fitness calculators when you need a clinical reference value with a defined lower limit of normal for adults aged 40–80 in rehabilitation, pulmonary, or cardiac contexts.
Side effects
- Age outside 40–80 range — returns error; Enright equations are not validated outside derivation range
- Missing required sex or age parameters — returns 400 validation error
- Height or weight outside plausible bounds (e.g. height_cm < 50 or > 250) — returns validation error
- Providing neither height_cm nor height_in — returns error requiring at least one height input
- walked_m outside 0–1500 range — returns validation error
- Conflicting or implausible anthropometric combinations may produce extreme but technically valid outputs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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