{
 "dataset": "study_types",
 "title": "Study type classifications",
 "description": "Counted publications in the analysis window by study type and evidence class.",
 "version": "2026.1.1",
 "snapshot_kind": "report",
 "data_through": "2026-09-30",
 "extracted_at": "2026-11-05T02:02:00.120976+00:00",
 "license": {
  "id": "CC-BY-4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/",
  "terms": "Peptide Library's classifications, counts and statistics are licensed under CC BY 4.0: reuse them with attribution to Peptide Library. Bibliographic identifiers, titles and dates are facts from PubMed (courtesy of the U.S. National Library of Medicine), Europe PMC, ClinicalTrials.gov, OpenAlex (CC0) and Crossref, used under their terms. No abstracts or full texts are included."
 },
 "sources": [
  "PubMed metadata courtesy of the U.S. National Library of Medicine (NLM terms)."
 ],
 "citation": "Peptide Library (2026). Study type classifications (Peptide Library Research Intelligence Center), version 2026.1.1. https://bestpeptidecalculator.app/research/data#dataset-study_types",
 "methodology": "https://bestpeptidecalculator.app/research/methodology",
 "columns": [
  {
   "name": "study_type",
   "description": "Study type id"
  },
  {
   "name": "evidence_class",
   "description": "Evidence class it belongs to"
  },
  {
   "name": "publications",
   "description": "Counted publications"
  }
 ],
 "rows": [
  {
   "study_type": "animal",
   "evidence_class": "animal",
   "publications": 17731
  },
  {
   "study_type": "case_report",
   "evidence_class": "human_clinical",
   "publications": 5664
  },
  {
   "study_type": "clinical_trial",
   "evidence_class": "human_clinical",
   "publications": 3664
  },
  {
   "study_type": "computational",
   "evidence_class": "computational",
   "publications": 788
  },
  {
   "study_type": "guideline",
   "evidence_class": "other",
   "publications": 130
  },
  {
   "study_type": "in_vitro",
   "evidence_class": "in_vitro",
   "publications": 6407
  },
  {
   "study_type": "meta_analysis",
   "evidence_class": "secondary",
   "publications": 1227
  },
  {
   "study_type": "observational",
   "evidence_class": "human_clinical",
   "publications": 9270
  },
  {
   "study_type": "other",
   "evidence_class": "other",
   "publications": 4069
  },
  {
   "study_type": "rct",
   "evidence_class": "human_clinical",
   "publications": 5492
  },
  {
   "study_type": "review",
   "evidence_class": "secondary",
   "publications": 8578
  },
  {
   "study_type": "systematic_review",
   "evidence_class": "secondary",
   "publications": 668
  },
  {
   "study_type": "unclassified",
   "evidence_class": "unclassified",
   "publications": 381
  }
 ]
}