{
  "package" : "hl7.terminology@6.3.0",
  "definition" : "A measure of heterogeneity accros study computed by summing the squared deviations of each study's estimate from the overall meta-analytic estimate, weighting each study's contribution in the same manner as in the meta-analysis.",
  "system" : "http://terminology.hl7.org/CodeSystem/attribute-estimate-type",
  "property" : [ ],
  "codesystem" : "1aaf1644-33ab-5e19-a613-1268cb038189",
  "concept_id" : "d99c5a64-6ff9-52ba-b1ce-bd69d0eed255",
  "ancestors" : {
    "0000419" : 0
  },
  "id" : "e602850c-0fdb-4910-994d-fd615346b110",
  "code" : "0000419",
  "display" : "Cochran's Q statistic",
  "version" : "1.0.1"
}