Tavaglione 2023 fibrotic NASH index (FNI) from AST, HbA1c, and HDL cholesterol

Tavaglione 2023 fibrotic NASH index (FNI) from AST, HbA1c, and HDL cholesterol. FNI = e^x/(1+e^x) with x = -10.33 + 2.54*ln(AST) + 3.86*ln(HbA1c) - 1.66*ln(HDL mg/dL). HDL may be mg/dL or mmol/L (×38.67). Rule-out ≤0.10; indeterminate between 0.10 and 0.33; rule-in ≥0.33. Not a biopsy, not FIB-4, not the NAFLD fibrosis score, not SAFE, and not BARD.

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Endpoint

POST https://api.magentlab.com/api/calc/fni

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "items": [
      {
        "a1c_percent": 5.5,
        "ast_u_l": 40,
        "hdl_mg_dl": 50,
        "hdl_mmol_l": 1.29
      },
      {
        "a1c_percent": 5.5,
        "ast_u_l": 40,
        "hdl_mg_dl": 50,
        "hdl_mmol_l": 1.29
      }
    ]
  },
  "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": {
                  "a1c_percent": {
                    "description": "HbA1c in percent (4-15). magent does not convert from eAG.",
                    "type": "number"
                  },
                  "ast_u_l": {
                    "description": "Aspartate aminotransferase in U/L (1-10000).",
                    "type": "number"
                  },
                  "hdl_mg_dl": {
                    "description": "HDL cholesterol in mg/dL (5-150). Provide this or hdl_mmol_l, not both. Used in the natural-log term.",
                    "type": "number"
                  },
                  "hdl_mmol_l": {
                    "description": "HDL cholesterol in mmol/L (0.1-3.9). Converted as mg/dL = mmol/L * 38.67. Provide this or hdl_mg_dl, not both.",
                    "type": "number"
                  }
                },
                "required": [
                  "ast_u_l",
                  "a1c_percent"
                ],
                "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"
}

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