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QIDS-SR16

QIDS

Map 16 caller-assigned Rush 2003 QIDS-SR integers (0-3) to nine DSM-IV domains (sleep, appetite/weight, and psychomotor are each the published max of their items) and return the 0-27 total and IRT severity band.

LIVE $0.005 USDC GET /api/calc/qids

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

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

What it computes

Map 16 caller-assigned Rush 2003 QIDS-SR integers (0-3) to nine DSM-IV domains (sleep, appetite/weight, and psychomotor are each the published max of their items) and return the 0-27 total and IRT severity band.

When to use

When an agent has already assigned Rush 2003 QIDS-SR 0-3 integers for all 16 items and needs the published nine-domain total, not a depression interview, QIDS-C, IDS-30, or PHQ-9.

When not to use

• Not a medical device and not a depression diagnosis or treatment order.
• magent does not administer a depression interview. Each of the 16 items is a caller-assigned integer 0-3. magent does not interpret the items.
• This is Rush 2003 QIDS-SR16 only. Sleep is the maximum of four sleep items; appetite/weight is the maximum of four appetite and weight items; psychomotor is the maximum of retardation and agitation; the remaining six items add as published. magent does not score QIDS-C, IDS-30, or PHQ-9.
• Published IRT conversion bands from this paper are 0-5 none, 6-10 mild, 11-15 moderate, 16-20 severe, and 21-27 very_severe. These are not PHQ-9 5/10/15/20 cutoffs.

Formula

QIDS-SR16 = max(sleep_onset, mid_nocturnal, early_morning, hypersomnia) + sad_mood + max(decreased_appetite, increased_appetite, decreased_weight, increased_weight) + concentration + self_view + suicidal_ideation + interest + energy + max(psychomotor_retardation, psychomotor_agitation); each caller-assigned 0-3; nine domains; max 27

Citation

Title

The 16-Item Quick Inventory of Depressive Symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression

Authors

Rush AJ, Trivedi MH, Ibrahim HM, et al.

Source

Biol Psychiatry. 2003;54(5):573-583

DOI

10.1016/s0006-3223(02)01866-8

Worked example

Also searched as

• QIDS
• QIDS-SR
• QIDS-SR16
• Quick Inventory of Depressive Symptomatology
• Rush QIDS
• 16-item QIDS
• QIDS self-report
• QIDS score

Try

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

/api/calc/qids?sleep_onset=0&mid_nocturnal=0&early_morning=0&hypersomnia=0&sad_mood=0&decreased_appetite=0&increased_appetite=0&decreased_weight=0&increased_weight=0&concentration=0&self_view=0&suicidal_ideation=0&interest=0&energy=0&psychomotor_retardation=0&psychomotor_agitation=0

Full URL: https://api.magentlab.com/api/calc/qids?sleep_onset=0&mid_nocturnal=0&early_morning=0&hypersomnia=0&sad_mood=0&decreased_appetite=0&increased_appetite=0&decreased_weight=0&increased_weight=0&concentration=0&self_view=0&suicidal_ideation=0&interest=0&energy=0&psychomotor_retardation=0&psychomotor_agitation=0

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/qids?sleep_onset=0&mid_nocturnal=0&early_morning=0&hypersomnia=0&sad_mood=0&decreased_appetite=0&increased_appetite=0&decreased_weight=0&increased_weight=0&concentration=0&self_view=0&suicidal_ideation=0&interest=0&energy=0&psychomotor_retardation=0&psychomotor_agitation=0"

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/qids 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": [
    {
      "concentration": "0",
      "decreased_appetite": "0",
      "decreased_weight": "0",
      "early_morning": "0",
      "energy": "0",
      "hypersomnia": "0",
      "increased_appetite": "0",
      "increased_weight": "0",
      "interest": "0",
      "mid_nocturnal": "0",
      "psychomotor_agitation": "0",
      "psychomotor_retardation": "0",
      "sad_mood": "0",
      "self_view": "0",
      "sleep_onset": "0",
      "suicidal_ideation": "0"
    },
    {
      "concentration": "0",
      "decreased_appetite": "0",
      "decreased_weight": "0",
      "early_morning": "0",
      "energy": "0",
      "hypersomnia": "0",
      "increased_appetite": "0",
      "increased_weight": "0",
      "interest": "0",
      "mid_nocturnal": "0",
      "psychomotor_agitation": "0",
      "psychomotor_retardation": "0",
      "sad_mood": "0",
      "self_view": "0",
      "sleep_onset": "0",
      "suicidal_ideation": "0"
    }
  ]
}

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/qids",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "sleep",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "sad_mood",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "appetite_weight",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "concentration",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "self_view",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "suicidal_ideation",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "interest",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "energy",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "psychomotor",
          "points": 0,
          "present": true
        }
      ],
      "severity": "none",
      "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": "Rush AJ, Trivedi MH, Ibrahim HM, et al.",
        "doi": "10.1016/s0006-3223(02)01866-8",
        "id": "rush-2003",
        "pmid": "12946886",
        "source": "Biol Psychiatry. 2003;54(5):573-583",
        "title": "The 16-Item Quick Inventory of Depressive Symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression"
      },
      "formula": "qids",
      "formula_expression": "QIDS-SR16 = max(sleep_onset, mid_nocturnal, early_morning, hypersomnia) + sad_mood + max(decreased_appetite, increased_appetite, decreased_weight, increased_weight) + concentration + self_view + suicidal_ideation + interest + energy + max(psychomotor_retardation, psychomotor_agitation); each caller-assigned 0-3; nine domains; max 27",
      "max_score": 27,
      "score": 0,
      "psychomotor_points": 0,
      "appetite_weight_points": 0,
      "sleep_points": 0
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "sleep",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "sad_mood",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "appetite_weight",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "concentration",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "self_view",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "suicidal_ideation",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "interest",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "energy",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "psychomotor",
          "points": 0,
          "present": true
        }
      ],
      "severity": "none",
      "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": "Rush AJ, Trivedi MH, Ibrahim HM, et al.",
        "doi": "10.1016/s0006-3223(02)01866-8",
        "id": "rush-2003",
        "pmid": "12946886",
        "source": "Biol Psychiatry. 2003;54(5):573-583",
        "title": "The 16-Item Quick Inventory of Depressive Symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression"
      },
      "formula": "qids",
      "formula_expression": "QIDS-SR16 = max(sleep_onset, mid_nocturnal, early_morning, hypersomnia) + sad_mood + max(decreased_appetite, increased_appetite, decreased_weight, increased_weight) + concentration + self_view + suicidal_ideation + interest + energy + max(psychomotor_retardation, psychomotor_agitation); each caller-assigned 0-3; nine domains; max 27",
      "max_score": 27,
      "score": 0,
      "psychomotor_points": 0,
      "appetite_weight_points": 0,
      "sleep_points": 0
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "value": 0,
      "factor": "sleep",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "sad_mood",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "appetite_weight",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "concentration",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "self_view",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "suicidal_ideation",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "interest",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "energy",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "psychomotor",
      "points": 0,
      "present": true
    }
  ],
  "severity": "none",
  "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": "Rush AJ, Trivedi MH, Ibrahim HM, et al.",
    "doi": "10.1016/s0006-3223(02)01866-8",
    "id": "rush-2003",
    "pmid": "12946886",
    "source": "Biol Psychiatry. 2003;54(5):573-583",
    "title": "The 16-Item Quick Inventory of Depressive Symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression"
  },
  "formula": "qids",
  "formula_expression": "QIDS-SR16 = max(sleep_onset, mid_nocturnal, early_morning, hypersomnia) + sad_mood + max(decreased_appetite, increased_appetite, decreased_weight, increased_weight) + concentration + self_view + suicidal_ideation + interest + energy + max(psychomotor_retardation, psychomotor_agitation); each caller-assigned 0-3; nine domains; max 27",
  "max_score": 27,
  "score": 0,
  "psychomotor_points": 0,
  "appetite_weight_points": 0,
  "sleep_points": 0
}

Client errors (HTTP 400)

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

Related tools

• PHQ-9 — Sum nine caller-assigned Kroenke 2001 PHQ-9 integers (0-3) and return the published total (max 27), severity cutpoints, and ≥10 screen.
• GAD-7 — Sum seven caller-assigned Spitzer 2006 GAD-7 integers (0-3) and return the published 0-21 total, 5/10/15 severity cuts, and ≥10 case-finding flag.
• SCOFF — Sum the five Morgan 1999 SCOFF items and return whether two or more answers are affirmative.

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.