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

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: NHANES WTSAF2YR: Fasting Subsample 2 Year MEC Weight

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{
  "resourceType" : "EvidenceVariable",
  "id" : "282898",
  "meta" : {
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    "lastUpdated" : "2026-08-31T23:09:12.613Z",
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    {
      "type" : {
        "text" : "NHANES variable name"
      },
      "value" : "WTSAF2YR"
    }
  ],
  "version" : "2017-2018",
  "name" : "WTSAF2YR",
  "title" : "NHANES WTSAF2YR: Fasting Subsample 2 Year MEC Weight",
  "shortTitle" : "Fasting Subsample 2 Year MEC Weight",
  "citeAs" : "NHANES WTSAF2YR: Fasting Subsample 2 Year MEC Weight [Database Entry: FHIR EvidenceVariable Resource]. Contributors: Brian S. Alper [Authors/Creators]. In: Fast Evidence Interoperability Resources (FEvIR) Platform, FOI 282898. Revised 2026-08-31. Available at: https://fevir.net/resources/EvidenceVariable/282898. Computable resource at: https://fevir.net/resources/EvidenceVariable/282898#json.",
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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)"
      }
    },
    {
      "extension" : [
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        🔗 "reference" : "EvidenceVariable/282897",
        "type" : "EvidenceVariable",
        "display" : "NHANES LBDGLUSI: Fasting Glucose (mmol/L)"
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  "actual" : true,
  "definition" : {
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      "text" : "Fasting Subsample 2 Year MEC Weight (coded as: WTSAF2YR from https://wwwn.cdc.gov/Nchs/Nhanes/2017-2018/GLU_J.htm version 2017-2018)"
    },
    "reference" : {
      🔗 "reference" : "Group/282899",
      "type" : "Group",
      "display" : "NHANES WTSAF2YR: Fasting Subsample 2 Year MEC Weight) Variable Definition"
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  },
  "handling" : {
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        "code" : "STATO:0000251",
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  },
  "conditional" : {
    "description" : "age greater than or equal to 12 years",
    "language" : "text/plain",
    "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" : "0 if No Lab Result or Not Fasting for 8 to <24 hours"
    }
  ]
}