WHO International Clinical Trials Registry Platform
Latest screenshot: 2024-07-29
Access to search interface:
open
Last major interface update:
N/A
Owner of search system:
World Health Organization
Location of system headquarters:
Geneva, CH
Year of launch:
2005
Type:
Clinical trials database
Twitter:
Description of search system (by system owner)
The main aim of the WHO ICTRP is to facilitate the prospective registration of the WHO Trial Registration Data Set on all clinical trials, and the public accessibility of that information.
Total coverage:
747.62K
Year-over-year growth (2020-2021):
-36.14%
Subject coverage:
Multidisciplinary
Retrospective coverage:
1999–2021
Record types:
1
Open Access records:
N/A
Search functionality and interface
Systematic keyword searching:
limited
Backward citation searching:
limited
Forward citation searching:
limited
Query builder:
Search history:
Match preview:
Sorting options:
0
Query
Latency with short query:
2.48 seconds
Latency with long query:
1.72 seconds
Controlled vocabulary:
Field codes:
6
Full text search:
Search string length (narrow):
1000 terms max.
Search string length (wide):
50 terms max.
Language support: Chinese:
Language support: Cyrillic:
Truncation:
Wildcards:
Keyword position irrelevant:
Longer strings, fewer hits:
Automatic query expansion (stemming):
Verbatim queries:
Reproducible queries (time):
Reproducible queries (locations):
Operators
Search operators:
3
Boolean 'OR':
Boolean 'AND':
Boolean 'NOT':
Proximity operator:
Boolean works exact:
Nested search (parentheses):
Citation search / filtering
Record type filters:
0
Results filters:
9
Suggested related records:
Supported by bibliometric tools:
N/A
Backward citation information:
Backward citation score:
N/A
Forward citation information:
Forward citation score:
N/A
Retrieval
Number of accessible records:
664054
Bulk select records:
Bulk export records:
747617
Export formats:
1
API:
no
Bulk select records' backward citations:
Bulk export backward citations:
N/A
Bulk select records' forward citations:
Bulk export forward citations:
N/A
