{
  "package" : "hl7.terminology@6.3.0",
  "definition" : "An estimate of the between-study variance in a random-effects meta-analysis. The square root of this number (i.e. Tau) is the estimated standard deviation of underlying effects across studies.",
  "system" : "http://terminology.hl7.org/CodeSystem/attribute-estimate-type",
  "property" : [ ],
  "codesystem" : "1aaf1644-33ab-5e19-a613-1268cb038189",
  "concept_id" : "73e0f9c9-5ea3-5bb2-a7f4-b1776198961d",
  "ancestors" : {
    "0000421" : 0
  },
  "id" : "b33832e3-5891-4c3f-b469-b1618cca543d",
  "code" : "0000421",
  "display" : "Tau squared",
  "version" : "1.0.1"
}