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Armstrong 2018 PREVAIL Cox Linear Predictor for mCRPC Overall Survival
x402
Armstrong 2018 PREVAIL Cox Linear Predictor for mCRPC Overall Survival 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 Armstrong 2018 PREVAIL trial Cox linear predictor score for overall survival in chemotherapy-naïve metastatic castration-resistant prostate cancer given 11 clinical variables
Price / call$0.005
Success—
StatusUnknown
How this service works
Armstrong 2018 PREVAIL Cox linear predictor for overall survival in chemotherapy-naïve metastatic castration-resistant prostate cancer from albumin, ALP versus ULN, bone metastases under 10, hemoglobin, LDH versus ULN, NLR under 2.5, pain 0-1, liver metastases, ln(PSA), months from diagnosis, and enzalutamide versus placebo. Table 1 HRs as ln(HR). Not a 1-/2-/3-year OS percent (no published S0). magent does not read bone scans. Not a dose or treatment order.
Output
Returns the Armstrong 2018 PREVAIL Cox linear predictor value expressed as ln(HR), computed from the 11 caller-supplied clinical variables using the Table 1 hazard ratios. Does not return a 1-, 2-, or 3-year OS percentage (no published S0 baseline survival function is applied). This is a continuous risk score, not a treatment recommendation.
Example use cases
Oncology trial eligibility risk stratification
“I need the PREVAIL Cox predictor score for a mCRPC patient being considered for a trial: albumin 4.0 g/dL, ALP above ULN, 12 or more bone mets, hemoglobin 11.5 g/dL, LDH above ULN, NLR 3.1 so not less than 2.5, pain score 3 so not 0-1, no liver mets, PSA 120 ng/mL, 24 months from diagnosis, and they'd be on placebo.”
Enzalutamide versus placebo OS risk comparison
“Run the Armstrong 2018 PREVAIL linear predictor twice for my patient — once assuming enzalutamide and once assuming placebo — so I can compare the ln(HR) difference. Albumin 3.5 g/dL, ALP below ULN, fewer than 10 bone mets, hemoglobin 13.0 g/dL, LDH below ULN, NLR less than 2.5, pain 0-1, no liver mets, PSA 22 ng/mL, 30 months since diagnosis.”
High-risk mCRPC prognostic scoring
“Score this high-risk chemotherapy-naïve mCRPC patient using the PREVAIL Cox model: albumin 2.9 g/dL, ALP above ULN, 15 bone mets so above 10, hemoglobin 10.2 g/dL, LDH above ULN, NLR 4.0 so not less than 2.5, pain score 5 so not 0-1, liver metastases present, PSA 850 ng/mL, 8 months since diagnosis, treatment enzalutamide.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/prevailWhen to prefer
Use this endpoint when you need the validated Armstrong 2018 PREVAIL trial Cox linear predictor for chemotherapy-naïve mCRPC patients and have all 11 clinical variables available as caller-assigned values. Prefer this over generic survival calculators when you specifically want the PREVAIL trial-derived hazard ratio coefficients from Table 1. Do not use it to obtain OS percentages, to read bone scans, to assay lab values, or to assign pain/NLR scores — those must be provided by the caller.
Side effects
- Missing required query parameters returns a 400 error
- PSA value outside the 0.1–10000 ng/mL range may be rejected or yield out-of-range results
- Boolean flags (NLR, pain, ALP, LDH, bone mets, liver mets, treatment) must be true/false; string or numeric values will fail validation
- albumin or hemoglobin outside physiological bounds may cause errors
- Payment not included or insufficient USDC will result in a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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