# DAPT score (Yeh 2016) DAPT score Status: LIVE Price: $0.005 USDC `GET /api/calc/dapt` HTML: https://magentlab.com/docs/dapt Markdown: https://magentlab.com/docs/dapt.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum the Yeh 2016 DAPT prediction rule after PCI from exclusive age bands and eight caller-assigned flags and return the published high/low band. ## When to use When an agent needs the published Yeh 2016 DAPT point total after PCI and must not invent a dual antiplatelet duration or ischemia/bleeding percents. ## When not to use - Not a medical device and not a prescription for dual antiplatelet therapy duration. - Not a diagnosis. magent does not interpret the angiogram or assign MI, stent, smoking, CHF, or LVEF; every flag is caller-assigned. - Age bands are mutually exclusive: younger than 65 scores 0; 65 to younger than 75 scores -1; 75 or older scores -2. Age 75 is -2, not -1. - Score >=2 is the published high band (continued thienopyridine associated with larger ischemic-event reduction); score <2 is low. Does not return ischemia or bleeding percents. ## Formula ``` DAPT = exclusive age (<65: 0, 65 to <75: -1, >=75: -2) + myocardial_infarction_at_presentation 1 + prior_mi_or_pci 1 + diabetes 1 + stent_diameter_lt_3mm 1 + smoking 1 + paclitaxel_eluting_stent 1 + chf_or_lvef_lt_30 2 + vein_graft_intervention 2; max 10; >=2 high, <2 low (Yeh 2016) ``` ## Citation [Development and Validation of a Prediction Rule for Benefit and Harm of Dual Antiplatelet Therapy Beyond 1 Year After Percutaneous Coronary Intervention](https://doi.org/10.1001/jama.2016.3775) Yeh RW, Secemsky EA, Kereiakes DJ, et al JAMA. 2016;315(16):1735-1749 DOI: [10.1001/jama.2016.3775](https://doi.org/10.1001/jama.2016.3775) ## Worked example ### Age 60, all flags false Given: `age=60, chf_or_lvef_lt_30=false, diabetes=false, myocardial_infarction_at_presentation=false, paclitaxel_eluting_stent=false, prior_mi_or_pci=false, smoking=false, stent_diameter_lt_3mm=false, vein_graft_intervention=false` 1. Age 60 is younger than 65 → 0; all flags false → 0 2. Score = 0 (max 10); risk_band low ### Age 60, CHF or LVEF <30% Given: `age=60, chf_or_lvef_lt_30=true, diabetes=false, myocardial_infarction_at_presentation=false, paclitaxel_eluting_stent=false, prior_mi_or_pci=false, smoking=false, stent_diameter_lt_3mm=false, vein_graft_intervention=false` 1. Age 60 → 0; chf_or_lvef_lt_30 → 2 2. Score = 2 (max 10); risk_band high ## Also searched as - DAPT score - Dual antiplatelet therapy score - Yeh DAPT - DAPT prediction rule - Yeh 2016 DAPT - prolonged DAPT score - DAPT after PCI ## Parameters - `age` (integer, required): Age in years (18-120). Yeh 2016 exclusive bands: younger than 65 scores 0; 65 to younger than 75 scores -1; 75 or older scores -2. Age 75 is -2, not -1. - `myocardial_infarction_at_presentation` (boolean, required): Myocardial infarction at presentation as assigned by the caller (Yeh 2016). true scores 1. magent does not diagnose MI. - `prior_mi_or_pci` (boolean, required): Prior myocardial infarction or prior PCI as assigned by the caller (Yeh 2016). true scores 1. - `diabetes` (boolean, required): Diabetes mellitus as assigned by the caller (Yeh 2016). true scores 1. - `stent_diameter_lt_3mm` (boolean, required): Stent diameter <3 mm as assigned by the caller (Yeh 2016). true scores 1. magent does not measure the stent. - `smoking` (boolean, required): Current cigarette smoking or smoking within the past year as assigned by the caller (Yeh 2016). true scores 1. - `paclitaxel_eluting_stent` (boolean, required): Paclitaxel-eluting stent as assigned by the caller (Yeh 2016). true scores 1. - `chf_or_lvef_lt_30` (boolean, required): Congestive heart failure or LVEF <30% as assigned by the caller (Yeh 2016). true scores 2. magent does not measure LVEF. - `vein_graft_intervention` (boolean, required): Vein-graft PCI as assigned by the caller (Yeh 2016). true scores 2. magent does not interpret the angiogram. ## Bulk (POST) POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement. Method: `POST /api/calc/dapt` Max items: 25 Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic) Status: PREVIEW - 1 to 25 items. Each item uses the same keys as the GET query parameters. - POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows. - The first invalid item fails the whole request (index in the 400 JSON). You are not charged. - HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row. - Catalog misses (empty matches, found=false) stay paid 200s inside that slot. - x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items. Example request: ```json { "items": [ { "age": "60", "chf_or_lvef_lt_30": "false", "diabetes": "false", "myocardial_infarction_at_presentation": "false", "paclitaxel_eluting_stent": "false", "prior_mi_or_pci": "false", "smoking": "false", "stent_diameter_lt_3mm": "false", "vein_graft_intervention": "false" }, { "age": "60", "chf_or_lvef_lt_30": "false", "diabetes": "false", "myocardial_infarction_at_presentation": "false", "paclitaxel_eluting_stent": "false", "prior_mi_or_pci": "false", "smoking": "false", "stent_diameter_lt_3mm": "false", "vein_graft_intervention": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/dapt Example 200: ```json { "count": 2, "path": "/api/calc/dapt", "items": [ { "components": [ { "value": 60, "factor": "age", "points": 0, "present": false }, { "factor": "myocardial_infarction_at_presentation", "points": 0, "present": false }, { "factor": "prior_mi_or_pci", "points": 0, "present": false }, { "factor": "diabetes", "points": 0, "present": false }, { "factor": "stent_diameter_lt_3mm", "points": 0, "present": false }, { "factor": "smoking", "points": 0, "present": false }, { "factor": "paclitaxel_eluting_stent", "points": 0, "present": false }, { "factor": "chf_or_lvef_lt_30", "points": 0, "present": false }, { "factor": "vein_graft_intervention", "points": 0, "present": false } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "citation": { "authors": "Yeh RW, Secemsky EA, Kereiakes DJ, et al", "doi": "10.1001/jama.2016.3775", "id": "yeh-2016", "pmid": "27022822", "source": "JAMA. 2016;315(16):1735-1749", "title": "Development and Validation of a Prediction Rule for Benefit and Harm of Dual Antiplatelet Therapy Beyond 1 Year After Percutaneous Coronary Intervention" }, "formula": "dapt", "formula_expression": "DAPT = exclusive age (<65: 0, 65 to <75: -1, >=75: -2) + myocardial_infarction_at_presentation 1 + prior_mi_or_pci 1 + diabetes 1 + stent_diameter_lt_3mm 1 + smoking 1 + paclitaxel_eluting_stent 1 + chf_or_lvef_lt_30 2 + vein_graft_intervention 2; max 10; >=2 high, <2 low (Yeh 2016)", "age_years": 60, "max_score": 10, "score": 0, "risk_band": "low" }, { "components": [ { "value": 60, "factor": "age", "points": 0, "present": false }, { "factor": "myocardial_infarction_at_presentation", "points": 0, "present": false }, { "factor": "prior_mi_or_pci", "points": 0, "present": false }, { "factor": "diabetes", "points": 0, "present": false }, { "factor": "stent_diameter_lt_3mm", "points": 0, "present": false }, { "factor": "smoking", "points": 0, "present": false }, { "factor": "paclitaxel_eluting_stent", "points": 0, "present": false }, { "factor": "chf_or_lvef_lt_30", "points": 0, "present": false }, { "factor": "vein_graft_intervention", "points": 0, "present": false } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "citation": { "authors": "Yeh RW, Secemsky EA, Kereiakes DJ, et al", "doi": "10.1001/jama.2016.3775", "id": "yeh-2016", "pmid": "27022822", "source": "JAMA. 2016;315(16):1735-1749", "title": "Development and Validation of a Prediction Rule for Benefit and Harm of Dual Antiplatelet Therapy Beyond 1 Year After Percutaneous Coronary Intervention" }, "formula": "dapt", "formula_expression": "DAPT = exclusive age (<65: 0, 65 to <75: -1, >=75: -2) + myocardial_infarction_at_presentation 1 + prior_mi_or_pci 1 + diabetes 1 + stent_diameter_lt_3mm 1 + smoking 1 + paclitaxel_eluting_stent 1 + chf_or_lvef_lt_30 2 + vein_graft_intervention 2; max 10; >=2 high, <2 low (Yeh 2016)", "age_years": 60, "max_score": 10, "score": 0, "risk_band": "low" } ] } ``` ## Response fields - `formula` (string): dapt - `formula_expression` (string): Exact expression used - `score` (integer): Yeh 2016 DAPT points -2 to 10 - `max_score` (integer): 10 - `risk_band` (string): Yeh 2016 band: high if score >=2 (continued thienopyridine associated with larger ischemic-event reduction); low if score <2. A band, not a duration order or diagnosis. - `age_years` (integer): Age used for the exclusive age band - `components` (array): Per-factor points - `citation` (object): Yeh et al. JAMA 2016 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 60, "factor": "age", "points": 0, "present": false }, { "factor": "myocardial_infarction_at_presentation", "points": 0, "present": false }, { "factor": "prior_mi_or_pci", "points": 0, "present": false }, { "factor": "diabetes", "points": 0, "present": false }, { "factor": "stent_diameter_lt_3mm", "points": 0, "present": false }, { "factor": "smoking", "points": 0, "present": false }, { "factor": "paclitaxel_eluting_stent", "points": 0, "present": false }, { "factor": "chf_or_lvef_lt_30", "points": 0, "present": false }, { "factor": "vein_graft_intervention", "points": 0, "present": false } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "citation": { "authors": "Yeh RW, Secemsky EA, Kereiakes DJ, et al", "doi": "10.1001/jama.2016.3775", "id": "yeh-2016", "pmid": "27022822", "source": "JAMA. 2016;315(16):1735-1749", "title": "Development and Validation of a Prediction Rule for Benefit and Harm of Dual Antiplatelet Therapy Beyond 1 Year After Percutaneous Coronary Intervention" }, "formula": "dapt", "formula_expression": "DAPT = exclusive age (<65: 0, 65 to <75: -1, >=75: -2) + myocardial_infarction_at_presentation 1 + prior_mi_or_pci 1 + diabetes 1 + stent_diameter_lt_3mm 1 + smoking 1 + paclitaxel_eluting_stent 1 + chf_or_lvef_lt_30 2 + vein_graft_intervention 2; max 10; >=2 high, <2 low (Yeh 2016)", "age_years": 60, "max_score": 10, "score": 0, "risk_band": "low" } ``` ## Errors - HTTP 400 `invalid_age`: age must be an integer from 18 to 120 Returned before settlement; you are not charged. - HTTP 400 `invalid_flag`: boolean clinical flags must be true or false Returned before settlement; you are not charged. - HTTP 400 `invalid_dapt`: each DAPT 2016 item must be a published value for that field. Returned before settlement; you are not charged. - HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged. - HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged. - HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged. Shared HTTP 402 and 503: https://magentlab.com/docs/payments ## Related tools - [CRUSADE bleeding score](https://magentlab.com/docs/crusade) — Compute the CRUSADE in-hospital major bleeding score from hematocrit, caller-assigned Cockcroft–Gault creatinine clearance, heart rate, sex, signs of CHF, prior vascular disease, diabetes, and systolic BP (Subherwal 2009 Table 4). ## Payment Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. - GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall). - HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote. - Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional. - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402. - offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront. - offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization. - not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search. Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers). Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments Stdio MCP (one process per host): https://magentlab.com/docs/mcp ## Guarantees - HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON. - exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE. - HTTP 402 is unpaid only. Do not sign a second authorization because of a 503. - Execution is timeout-bounded and concurrency-capped. - Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.