Evidence Based Medicine on FHIR Implementation Guide
1.0.0-ballot3 - STU 1 Ballot 3 World

Evidence Based Medicine on FHIR Implementation Guide, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ballot3 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/ebm/ and changes regularly. See the Directory of published versions

: NHANES LBDGLUSI: Fasting Glucose (mmol/L)

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{
  "resourceType" : "EvidenceVariable",
  "id" : "282897",
  "meta" : {
    "versionId" : "17",
    "lastUpdated" : "2026-08-31T13:57:59.124Z",
    "profile" : [
      🔗 "http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition"
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    },
    {
      "type" : {
        "text" : "NHANES variable name"
      },
      "value" : "LBDGLUSI"
    }
  ],
  "version" : "2017-2018",
  "name" : "LBDGLUSI",
  "title" : "NHANES LBDGLUSI: Fasting Glucose (mmol/L)",
  "shortTitle" : "Fasting Glucose (mmol/L)",
  "citeAs" : "NHANES LBDGLUSI: Fasting Glucose (mmol/L) [Database Entry: FHIR EvidenceVariable Resource]. Contributors: Brian S. Alper [Authors/Creators]. In: Fast Evidence Interoperability Resources (FEvIR) Platform, FOI 282897. Revised 2026-08-31. Available at: https://fevir.net/resources/EvidenceVariable/282897. Computable resource at: https://fevir.net/resources/EvidenceVariable/282897#json.",
  "status" : "active",
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  ],
  "description" : "This variable definition is used for an NHANES data dictionary.",
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      "targetUri" : "https://wwwn.cdc.gov/Nchs/Nhanes/2017-2018/GLU_J.htm"
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      },
      "targetReference" : {
        🔗 "reference" : "Composition/282931",
        "type" : "Composition",
        "display" : "NHANES Plasma Fasting Glucose (GLU_J) Data Dictionary"
      }
    },
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      },
      "targetReference" : {
        🔗 "reference" : "EvidenceVariable/282881",
        "type" : "EvidenceVariable",
        "display" : "NHANES LBXGLU: Fasting Glucose (mg/dL)"
      }
    },
    {
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      "targetReference" : {
        🔗 "reference" : "EvidenceVariable/282881",
        "type" : "EvidenceVariable",
        "display" : "NHANES LBXGLU: Fasting Glucose (mg/dL)"
      }
    },
    {
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      },
      "targetReference" : {
        🔗 "reference" : "EvidenceVariable/282898",
        "type" : "EvidenceVariable",
        "display" : "NHANES WTSAF2YR: Fasting Subsample 2 Year MEC Weight"
      }
    }
  ],
  "actual" : true,
  "definition" : {
    "concept" : {
      "text" : "Fasting Glucose (mmol/L) -- code LBDGLUSI in https://wwwn.cdc.gov/Nchs/Nhanes/2017-2018/GLU_J.htm version 2017-2018"
    },
    "reference" : {
      🔗 "reference" : "Group/282891",
      "type" : "Group",
      "display" : "NHANES LBDGLUSI: Fasting Glucose (mmol/L) Variable Definition"
    }
  },
  "definitionModifier" : [
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      "code" : {
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      "valueCodeableConcept" : {
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          {
            "system" : "http://unitsofmeasure.org",
            "code" : "mmol/L",
            "display" : "mmol/L"
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        ]
      }
    },
    {
      "code" : {
        "text" : "Data transformation method"
      },
      "valueExpression" : {
        "description" : "The fasting glucose value in mg/dL (LBXGLU) was converted to mmol/L (LBDGLUSI) by multiplying by 0.05551 (rounded to 3 decimals).",
        "expression" : "LBDGLUSI = LBXGLU * 0.05551"
      }
    }
  ],
  "handling" : {
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        "system" : "https://fevir.net/sevco",
        "code" : "STATO:0000251",
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    ]
  },
  "conditional" : {
    "description" : "if age >= 12 years",
    "expression" : "age >= 12 years"
  },
  "classifier" : [
    {
      "text" : "Plasma Fasting Glucose (GLU_J)"
    }
  ],
  "dataStorage" : [
    {
      "datatype" : {
        "text" : "SAS floating-point number"
      }
    }
  ],
  "period" : {
    "start" : "2017",
    "end" : "2018"
  },
  "unacceptableDataHandling" : [
    {
      "text" : "Participants whom provided blood specimen but did not meet the 8 to less than 24 hour fasting criteria (n=180) have the sample weight value assigned as '0' (WTSAF2YR =0) as well. Glucose measurements for these 180 participants are included in the dataset. However, to include these data in the analysis, a reweighting would be required."
    }
  ]
}