Body size · LIVE

ORAI osteoporosis risk assessment

ORAI

Sum Cadarette 2000 ORAI (age, weight, and current estrogen use) and return the Table 4 point total with select_for_dxa (score ≥9) or do_not_select.

LIVE $0.005 USDC GET /api/calc/orai

Markdown: /docs/orai.md · Canonical: https://magentlab.com/docs/orai

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Sum Cadarette 2000 ORAI (age, weight, and current estrogen use) and return the Table 4 point total with select_for_dxa (score ≥9) or do_not_select.

When to use

When an agent has caller-supplied age (years), weight, and current estrogen use and needs the published Cadarette 2000 ORAI point total and densitometry-selection band, not a DXA order, OSTA index, FRAX probability, or osteoporosis diagnosis.

When not to use

• Not a medical device. Not a DXA order, densitometry prescription, or osteoporosis diagnosis. magent does not weigh the patient.
• Cadarette 2000 ORAI only (age, weight, current estrogen). Not Koh 2001 OSTA and not FRAX.
• Selection tool for bone densitometry: women with a total score of 9 or greater would be selected. Not a T-score, fracture probability, or treatment threshold.
• Derived in women aged 45 years or older. Age 45–54 scores 0 (published band). Not for men.

Formula

ORAI = age_score + weight_score + estrogen_score; age >=75 -> 15, 65-74 -> 9, 55-64 -> 5, 45-54 -> 0; weight <60 kg -> 9, 60-69 kg -> 3, >=70 kg -> 0; current_estrogen false -> 2, true -> 0; max 26; select_for_dxa iff score>=9

Citation

Title

Development and validation of the Osteoporosis Risk Assessment Instrument to facilitate selection of women for bone densitometry

Authors

Cadarette SM, Jaglal SB, Kreiger N, McIsaac WJ, Darlington GA, Tu JV

Source

CMAJ. 2000;162(9):1289-1294

DOI

none

Worked example

Also searched as

• ORAI
• Osteoporosis Risk Assessment Instrument
• Cadarette ORAI
• Cadarette 2000
• bone densitometry selection
• ORAI score
• osteoporosis densitometry score
• select for DXA

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/orai?age=70&weight_kg=65&current_estrogen=true

Full URL: https://api.magentlab.com/api/calc/orai?age=70&weight_kg=65&current_estrogen=true

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/orai?age=70&weight_kg=65&current_estrogen=true"

Parameters

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.

POST /api/calc/orai Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 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 (fixture)

{
  "items": [
    {
      "age": "70",
      "current_estrogen": "true",
      "weight_kg": "65"
    },
    {
      "age": "70",
      "current_estrogen": "true",
      "weight_kg": "65"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/orai",
  "items": [
    {
      "components": [
        {
          "value": 70,
          "factor": "age",
          "points": 9,
          "present": true
        },
        {
          "value": 65.0,
          "factor": "weight",
          "points": 3,
          "present": true
        },
        {
          "value": true,
          "factor": "no_current_estrogen",
          "points": 0,
          "present": false
        }
      ],
      "age": 70,
      "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": "Cadarette SM, Jaglal SB, Kreiger N, McIsaac WJ, Darlington GA, Tu JV",
        "id": "cadarette-2000",
        "pmid": "10813010",
        "source": "CMAJ. 2000;162(9):1289-1294",
        "title": "Development and validation of the Osteoporosis Risk Assessment Instrument to facilitate selection of women for bone densitometry"
      },
      "formula": "orai",
      "formula_expression": "ORAI = age_score + weight_score + estrogen_score; age >=75 -> 15, 65-74 -> 9, 55-64 -> 5, 45-54 -> 0; weight <60 kg -> 9, 60-69 kg -> 3, >=70 kg -> 0; current_estrogen false -> 2, true -> 0; max 26; select_for_dxa iff score>=9",
      "max_score": 26,
      "score": 12,
      "weight_kg": 65.0,
      "age_score": 9,
      "current_estrogen": true,
      "estrogen_score": 0,
      "orai_band": "select_for_dxa",
      "weight_score": 3
    },
    {
      "components": [
        {
          "value": 70,
          "factor": "age",
          "points": 9,
          "present": true
        },
        {
          "value": 65.0,
          "factor": "weight",
          "points": 3,
          "present": true
        },
        {
          "value": true,
          "factor": "no_current_estrogen",
          "points": 0,
          "present": false
        }
      ],
      "age": 70,
      "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": "Cadarette SM, Jaglal SB, Kreiger N, McIsaac WJ, Darlington GA, Tu JV",
        "id": "cadarette-2000",
        "pmid": "10813010",
        "source": "CMAJ. 2000;162(9):1289-1294",
        "title": "Development and validation of the Osteoporosis Risk Assessment Instrument to facilitate selection of women for bone densitometry"
      },
      "formula": "orai",
      "formula_expression": "ORAI = age_score + weight_score + estrogen_score; age >=75 -> 15, 65-74 -> 9, 55-64 -> 5, 45-54 -> 0; weight <60 kg -> 9, 60-69 kg -> 3, >=70 kg -> 0; current_estrogen false -> 2, true -> 0; max 26; select_for_dxa iff score>=9",
      "max_score": 26,
      "score": 12,
      "weight_kg": 65.0,
      "age_score": 9,
      "current_estrogen": true,
      "estrogen_score": 0,
      "orai_band": "select_for_dxa",
      "weight_score": 3
    }
  ]
}

Response

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "value": 70,
      "factor": "age",
      "points": 9,
      "present": true
    },
    {
      "value": 65.0,
      "factor": "weight",
      "points": 3,
      "present": true
    },
    {
      "value": true,
      "factor": "no_current_estrogen",
      "points": 0,
      "present": false
    }
  ],
  "age": 70,
  "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": "Cadarette SM, Jaglal SB, Kreiger N, McIsaac WJ, Darlington GA, Tu JV",
    "id": "cadarette-2000",
    "pmid": "10813010",
    "source": "CMAJ. 2000;162(9):1289-1294",
    "title": "Development and validation of the Osteoporosis Risk Assessment Instrument to facilitate selection of women for bone densitometry"
  },
  "formula": "orai",
  "formula_expression": "ORAI = age_score + weight_score + estrogen_score; age >=75 -> 15, 65-74 -> 9, 55-64 -> 5, 45-54 -> 0; weight <60 kg -> 9, 60-69 kg -> 3, >=70 kg -> 0; current_estrogen false -> 2, true -> 0; max 26; select_for_dxa iff score>=9",
  "max_score": 26,
  "score": 12,
  "weight_kg": 65.0,
  "age_score": 9,
  "current_estrogen": true,
  "estrogen_score": 0,
  "orai_band": "select_for_dxa",
  "weight_score": 3
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

Related tools

• OSTA — Compute the Koh 2001 Osteoporosis Self-Assessment Tool for Asians (OSTA) as trunc(0.2 × (weight_kg − age)) toward zero, then the published low, intermediate, or high band.
• MUST — Sum Stratton 2004 MUST (BMI, unplanned weight-loss percent, and acute disease with no nutritional intake >5 days) and return score 0–6 with risk low, medium, or high.

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. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /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.