{
  "package" : "hl7.terminology.r4@6.3.0",
  "definition" : "A type of relative effect estimate that compares rates over time (eg events per person-years).",
  "system" : "http://terminology.hl7.org/CodeSystem/statistic-type",
  "property" : [ ],
  "codesystem" : "fca7c533-16e4-5047-a0b4-a8f0d355a8a0",
  "concept_id" : "596c9c8b-f2c4-5dff-8415-e43b2c467d51",
  "ancestors" : {
    "rate-ratio" : 0
  },
  "id" : "fc840afe-92b7-49bf-b880-3ddb7f4856e1",
  "code" : "rate-ratio",
  "display" : "Incidence Rate Ratio",
  "version" : "1.0.1"
}