| Level/ Type | Status | Code | Description | 
                           
                              | 0‑L |  Draft | 001 | Minimum age of examined subjects | 
                           
                              | 0‑L |  Draft | 002 | Maximum age of examined subjects | 
                           
                              | 0‑L |  Draft | 003 | Case-only | 
                           
                              | 0‑L |  Draft | 004 | Case-cohort | 
                           
                              | 0‑L |  Draft | 005 | Trend | 
                           
                              | 0‑L |  Draft | 006 | Cross-section ad-hoc follow-up | 
                           
                              | 0‑L |  Draft | 007 | Quality control studies | 
                           
                              | 0‑L |  Draft | 008 | Respondent-driven sampling | 
                           
                              | 0‑L |  Draft | 009 | Data dictionary | 
                           
                              | 0‑L |  Draft | 010 | Analytic code | 
                           
                              | 0‑L |  Draft | 011 | Codebook | 
                           
                              | 0‑L |  Draft | 012 | Outcomes assessor | 
                           
                              | 0‑L |  Draft | 013 | All rights reserved | 
                           
                              | 0‑L |  Draft | 014 | Intervention ongoing | 
                           
                              | 0‑L |  Draft | 015 | Intervention completed, follow-up ongoing | 
                           
                              | 0‑L |  Draft | 016 | Interview schema and themes | 
                           
                              | 0‑L |  Draft | 017 | Observation guide | 
                           
                              | 0‑L |  Draft | 018 | Discussion guide | 
                           
                              | 0‑L |  Draft | 019 | Participant tasks | 
                           
                              | 0‑L |  Draft | 020 | Other data collection instrument | 
                           
                              | 0‑L |  Draft | 021 | Other study document | 
                           
                              | 0‑L |  Draft | 022 | Not yet recruiting | 
                           
                              | 0‑L |  Draft | 023 | Enrolling by invitation | 
                           
                              | 0‑L |  Draft | 024 | Active, not recruiting | 
                           
                              | 0‑L |  Draft | 025 | Withdrawn | 
                           
                              | 0‑L |  Draft | 026 | Request for approval not yet submitted | 
                           
                              | 0‑L |  Draft | 027 | Study withdrawn prior to decision on approval | 
                           
                              | 0‑L |  Draft | 028 | Administrative databases | 
                           
                              | 0‑L |  Draft | 029 | Cognitive measurements | 
                           
                              | 0‑L |  Draft | 030 | Genealogical records | 
                           
                              | 0‑L |  Draft | 031 | Imaging data | 
                           
                              | 0‑L |  Draft | 032 | Physiological/Biochemical measurements | 
                           
                              | 0‑L |  Draft | 033 | Omics technology | 
                           
                              | 0‑L |  Draft | 034 | Probability Sampling Method | 
                           
                              | 0‑L |  Draft | 035 | Mixed Probability and Non-Probability Sampling Method | 
                           
                              | 0‑L |  Draft | 036 | Total universe/Complete enumeration | 
                           
                              | 0‑L |  Draft | 037 | Primary Sponsor | 
                           
                              | 0‑L |  Draft | 038 | Data Collector | 
                           
                              | 0‑L |  Draft | 039 | Data Curator | 
                           
                              | 0‑D |  Rejected | code-40 |  | 
                           
                              | 0‑L |  Draft | 041 | Project Manager | 
                           
                              | 0‑L |  Draft | 042 | Project Member | 
                           
                              | 0‑L |  Draft | 043 | Related Person | 
                           
                              | 0‑L |  Draft | 044 | Rights Holder | 
                           
                              | 0‑L |  Draft | 045 | Work Packager Leader | 
                           
                              | 0‑L |  Draft | 046 | Public Funder | 
                           
                              | 0‑L |  Draft | 047 | Private Funder | 
                           
                              | 0‑L |  Draft | 048 | Research Group | 
                           
                              | 0‑L |  Draft | 049 | Hosting Institution | 
                           
                              | 0‑L |  Draft | 050 | Registration Agency | 
                           
                              | 0‑L |  Draft | 051 | Computational Notebook | 
                           
                              | 0‑L |  Draft | 052 | Data Paper | 
                           
                              | 0‑L |  Draft | 053 | Interactive Resource | 
                           
                              | 0‑L |  Draft | 054 | Output Management Plan | 
                           
                              | 0‑D |  Rejected | code-55 |  | 
                           
                              | 0‑L |  Draft | 040 | Project Leader | 
                           
                              | 0‑L |  Draft | 055 | A is cited by B | 
                           
                              | 0‑L |  Draft | code-58 | A cites B | 
                           
                              | 0‑L |  Draft | 057 | A is supplemented by B | 
                           
                              | 0‑L |  Draft | 058 | A is continued by B | 
                           
                              | 0‑L |  Draft | 059 | A is described by B | 
                           
                              | 0‑L |  Draft | 060 | A describes B | 
                           
                              | 0‑L |  Draft | 061 | A is metadata for B | 
                           
                              | 0‑L |  Draft | 062 | A has version B | 
                           
                              | 0‑L |  Draft | 063 | A is version of B | 
                           
                              | 0‑L |  Draft | 064 | A is previous version of B | 
                           
                              | 0‑L |  Draft | 065 | A is part of B | 
                           
                              | 0‑L |  Draft | 066 | A is referenced by B | 
                           
                              | 0‑L |  Draft | 067 | A is documented by B | 
                           
                              | 0‑L |  Draft | 068 | A is compiled by B | 
                           
                              | 0‑L |  Draft | 069 | A compiles B | 
                           
                              | 0‑L |  Draft | 070 | A is variant form of B | 
                           
                              | 0‑L |  Draft | 071 | A is original form of B | 
                           
                              | 0‑L |  Draft | 072 | A is identical to B | 
                           
                              | 0‑L |  Draft | 073 | A is reviewed by B | 
                           
                              | 0‑L |  Draft | 074 | A reviews B | 
                           
                              | 0‑L |  Draft | 075 | A is source of B | 
                           
                              | 0‑L |  Draft | 076 | A is required by B | 
                           
                              | 0‑L |  Draft | 077 | A requires B | 
                           
                              | 0‑L |  Draft | 078 | A is obsoleted by B | 
                           
                              | 0‑L |  Draft | 079 | A obsoletes B | 
                           
                              | 0‑L |  Draft | 080 | ORCID | 
                           
                              | 0‑L |  Draft | 081 | ROR | 
                           
                              | 0‑L |  Draft | 082 | GRID | 
                           
                              | 0‑L |  Draft | 083 | ISNI | 
                           
                              | 0‑L |  Draft | 084 | Monocentric | 
                           
                              | 0‑L |  Draft | 085 | First submitted | 
                           
                              | 0‑L |  Draft | 086 | First posted | 
                           
                              | 0‑L |  Draft | 087 | Last update submitted | 
                           
                              | 0‑L |  Draft | 088 | Last update posted | 
                           
                              | 0‑L |  Draft | 089 | arXiv | 
                           
                              | 0‑L |  Draft | 090 | EAN13 | 
                           
                              | 0‑L |  Draft | 091 | EISSN | 
                           
                              | 0‑L |  Draft | 092 | ISBN | 
                           
                              | 0‑L |  Draft | 093 | ISSN | 
                           
                              | 0‑L |  Draft | 094 | ISTC | 
                           
                              | 0‑L |  Draft | 095 | LISSN | 
                           
                              | 0‑L |  Draft | 096 | PURL | 
                           
                              | 0‑L |  Draft | 097 | w3id | 
                           
                              | 0‑L |  Draft | 098 | DRKS | 
                           
                              | 0‑L |  Draft | 099 | ISRCTN | 
                           
                              | 0‑L |  Draft | 100 | EUDAMED | 
                           
                              | 0‑L |  Draft | 101 | UTN | 
                           
                              | 0‑L |  Draft | 102 | KonsortSWD | 
                           
                              | 0‑L |  Draft | 103 | MDM Portal | 
                           
                              | 0‑L |  Draft | 104 | NFDI4Health | 
                           
                              | 0‑L |  Draft | 105 | diverse | 
                           
                              | 0‑L |  Draft | 106 | NCT (ClinicalTrials.gov) | 
                           
                              | 0‑L |  Draft | 107 | EudraCT | 
                           
                              | 0‑L |  Draft | 108 | A is supplement to B | 
                           
                              | 0‑L |  Draft | 109 | A continues B | 
                           
                              | 0‑L |  Draft | 110 | A has metadata B | 
                           
                              | 0‑L |  Draft | 111 | A is new version of B | 
                           
                              | 0‑L |  Draft | 112 | A has part B | 
                           
                              | 0‑L |  Draft | 113 | A references B | 
                           
                              | 0‑L |  Draft | 114 | A documents B | 
                           
                              | 0‑L |  Draft | 115 | A is derived from B | 
                           
                              | 0‑L |  Draft | 116 | Self-report (questionnaires or interviews), cases verified | 
                           
                              | 0‑L |  Draft | 117 | Self-report (questionnaires or interviews), cases not verified | 
                           
                              | 0‑L |  Draft | 118 | 24-h dietary recall | 
                           
                              | 0‑L |  Draft | 119 | Proxy-administered | 
                           
                              | 0‑L |  Draft | 120 | Food record | 
                           
                              | 0‑L |  Draft | 121 | Described portion sizes | 
                           
                              | 0‑L |  Draft | 122 | Picture book/visual aids | 
                           
                              | 0‑L |  Draft | 123 | Weighing | 
                           
                              | 0‑L |  Draft | 124 | Volume measures | 
                           
                              | 0‑L |  Draft | 125 | Online questionnaire | 
                           
                              | 0‑L |  Draft | 126 | Cluster | 
                           
                              | 0‑L |  Draft | 127 | Cluster: Simple random | 
                           
                              | 0‑L |  Draft | 128 | Cluster: Stratified random | 
                           
                              | 0‑L |  Draft | 129 | Screener | 
                           
                              | 0‑L |  Draft | 130 | Interventional | 
                           
                              | 0‑L |  Draft | 131 | Non-interventional | 
                           
                              | 0‑L |  Draft | 132 | Vaccine and biological substance (Pharmacologic Substance) | 
                           
                              | 0‑L |  Draft | 133 | Single Group | 
                           
                              | 0‑L |  Draft | 134 | Parallel | 
                           
                              | 0‑L |  Draft | 135 | Crossover | 
                           
                              | 0‑L |  Draft | 136 | Factorial | 
                           
                              | 0‑L |  Draft | 137 | Sequential | 
                           
                              | 0‑L |  Draft | 138 | Other (interventional) | 
                           
                              | 0‑L |  Draft | 139 | Unknown (interventional) | 
                           
                              | 0‑L |  Draft | 140 | Case-control | 
                           
                              | 0‑L |  Draft | 141 | Nested case-control | 
                           
                              | 0‑L |  Draft | 142 | Case-crossover | 
                           
                              | 0‑L |  Draft | 143 | Ecologic or community studies | 
                           
                              | 0‑S |  Draft | 144 | Family-based | 
                           
                              | 1‑L |  Draft | 161 | Conditions related to sexual health | 
                           
                              | 0‑L |  Draft | 145 | Twin study | 
                           
                              | 0‑L |  Draft | 146 | Cohort | 
                           
                              | 0‑L |  Draft | 147 | Birth cohort | 
                           
                              | 0‑L |  Draft | 148 | Panel | 
                           
                              | 0‑L |  Draft | 149 | Longitudinal | 
                           
                              | 0‑L |  Draft | 150 | Cross-section | 
                           
                              | 0‑L |  Draft | 151 | Time series | 
                           
                              | 0‑L |  Draft | 152 | Registry | 
                           
                              | 0‑L |  Draft | 153 | Other (non-inverventional) | 
                           
                              | 0‑L |  Draft | 154 | Unknown (non interventional) | 
                           
                              | 0‑L |  Draft | 155 | Retrospective | 
                           
                              | 0‑L |  Draft | 156 | Prospective | 
                           
                              | 0‑L |  Draft | 157 | Nonrandomized | 
                           
                              | 0‑L |  Draft | 158 | Not applicable (for single-arm trials) | 
                           
                              | 0‑L |  Draft | 159 | Randomized | 
                           
                              | 0‑L |  Draft | 160 | Non-probability | 
                           
                              | 0‑L |  Draft | 162 | Cross-sectional (timePerspectives) | 
                           
                              | 0‑L |  Draft | 163 | Other (timePerspectives) | 
                           
                              | 0‑L |  Draft | 164 | Other (method) | 
                           
                              | 0‑L |  Draft | 165 | Unknown (method) | 
                           
                              | 0‑L |  Draft | 166 | Not applicable (method) | 
                           
                              | 0‑L |  Draft | 167 | Simple random | 
                           
                              | 0‑L |  Draft | 168 | Systematic random | 
                           
                              | 0‑L |  Draft | 169 | Stratified | 
                           
                              | 0‑L |  Draft | 170 | Stratified: Proportional | 
                           
                              | 0‑L |  Draft | 171 | Stratified: Disproportional | 
                           
                              | 0‑L |  Draft | 172 | Multistage | 
                           
                              | 0‑L |  Draft | 173 | Quota | 
                           
                              | 0‑L |  Draft | 174 | Purposive | 
                           
                              | 0‑L |  Draft | 175 | Availability |