Armstrong 2018 PREVAIL Cox linear predictor for overall survival in chemotherapy
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.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
305 msmedian answer time
$0.005listed price per call
$0.007price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.magentlab.com/api/calc/prevail
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 305 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"albumin_g_dl": 4,
"alp_below_uln": true,
"bone_mets_lt_10": true,
"hemoglobin_g_dl": 13,
"ldh_below_uln": true,
"months_since_diagnosis": 60,
"nlr_lt_2_5": true,
"no_liver_metastases": true,
"pain_0_to_1": true,
"psa_ng_ml": 20,
"treatment_enzalutamide": true
},
{
"albumin_g_dl": 4,
"alp_below_uln": true,
"bone_mets_lt_10": true,
"hemoglobin_g_dl": 13,
"ldh_below_uln": true,
"months_since_diagnosis": 60,
"nlr_lt_2_5": true,
"no_liver_metastases": true,
"pain_0_to_1": true,
"psa_ng_ml": 20,
"treatment_enzalutamide": true
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"albumin_g_dl": {
"description": "Serum albumin in g/dL (1.0-6.5). Armstrong 2018 Table 1: continuous, HR 0.71 per g/dL. magent does not assay albumin.",
"type": "number"
},
"alp_below_uln": {
"description": "Alkaline phosphatase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus \u2265ULN) has HR 0.79. magent does not assay ALP or apply ULN.",
"type": "boolean"
},
"bone_mets_lt_10": {
"description": "Fewer than 10 bone metastases as assigned by the caller (true or false). Table 1: true (<10 versus \u226510) has HR 0.68. magent does not read bone scans.",
"type": "boolean"
},
"hemoglobin_g_dl": {
"description": "Hemoglobin in g/dL (3.0-22.0). Table 1: continuous, HR 0.85 per g/dL. magent does not assay hemoglobin.",
"type": "number"
},
"ldh_below_uln": {
"description": "Lactate dehydrogenase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus \u22651\u00d7ULN) has HR 0.67. magent does not assay LDH or apply ULN.",
"type": "boolean"
},
"months_since_diagnosis": {
"description": "Time from diagnosis to randomization in months (0-720). Table 1: continuous, HR 0.997 per month. magent does not date the interval.",
"type": "number"
},
"nlr_lt_2_5": {
"description": "Neutrophil-to-lymphocyte ratio <2.5 as assigned by the caller (true or false). Table 1: true (<2.5 versus \u22652.5) has HR 0.69. magent does not compute NLR from counts.",
"type": "boolean"
},
"no_liver_metastases": {
"description": "No liver metastases as assigned by the caller (true or false). Table 1 pattern of spread: true (no liver metastases versus any liver metastases) has HR 0.49. magent does not read imaging.",
"type": "boolean"
},
"pain_0_to_1": {
"description": "Pain score 0-1 versus \u22652 on the paper's linear scale, as assigned by the caller (true or false). Table 1: true (0-1 versus \u22652) has HR 0.77. magent does not assign pain scores.",
"type": "boolean"
},
"psa_ng_ml": {
"description": "Baseline PSA in ng/mL (0.1-10000). Table 1: continuous log_e PSA, HR 1.23 per ln(ng/mL). magent does not assay PSA.",
"type": "number"
},
"treatment_enzalutamide": {
"description": "true if the PREVAIL treatment term is enzalutamide, false if placebo. Table 1: true (enzalutamide versus placebo) has HR 0.68. Not a dose or treatment order.",
"type": "boolean"
}
},
"required": [
"albumin_g_dl",
"alp_below_uln",
"bone_mets_lt_10",
"hemoglobin_g_dl",
"ldh_below_uln",
"nlr_lt_2_5",
"pain_0_to_1",
"no_liver_metastases",
"psa_ng_ml",
"months_since_diagnosis",
"treatment_enzalutamide"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}