Study relationship types
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Clinical research studies may relate to each other, forming clusters of inter-related research. Being able to store these relationships allows the MDR to identify studies related to those already selected by a user, and thus help in finding relevant material.
The relationship types were all developed by ECRIN, and relate to relationships found particularly within clinical research. In almost all cases they come in related pairs, allowing both ‘views’ of a relationship.
| id | name | description | use_in_data_entry | source |
|---|---|---|---|---|
| 11 | Is a sub-study of | This study is a sub-study or sub-protocol undertaken at the same time as <the target study>. | ECRIN | |
| 12 | Includes as a sub-study | Has <the target study> as a sub-study or sub-protocol, undertaken at the same time as this study. | ECRIN | |
| 13 | Is in the same series as | This study is in a sequence that began with <the target study>. | ECRIN | |
| 14 | Is the first of a sequence including | This study began a sequence that includes <the target study>. | ECRIN | |
| 15 | Is a feasibility study for | This study is a feasibility or pilot study for <the target study>. | ECRIN | |
| 16 | Is preceded by the feasibility study | This study was preceded by <the target study> as a feasibility or pilot study. | ECRIN | |
| 17 | Is a later phase variant of | For trials using the phase I to IV classification, this study is a later phase continuation of <the target study>. | ECRIN | |
| 18 | Is an earlier phase variant of | For trials using the phase I to IV classification, this study is an earlier phase precursor to <the target study>. | ECRIN | |
| 19 | Is a continuation of | This study uses some or all of the same subject population as <the target study>. | ECRIN | |
| 20 | Is continued by | This study has some or all of the same subject population targeted by <the target study>. | ECRIN | |
| 21 | Is a repeat of | This study uses a different population but the same or similar protocol as <the target study>. | ECRIN | |
| 22 | Is repeated by | This study is repeated by <the target study>, with the same or similar protocol but using a different population. | ECRIN | |
| 23 | has an expanded access version | This study has <the target study> as an expanded access version, (for people who cannot enrol in the trial but who may benefit from the product under investigation). | ECRIN (ClinicalTrials.gov) | |
| 24 | is an expanded access version of | This study is an expanded access version of <the target study>, catering for people who cannot enrol in the trial but who may benefit from the product under investigation. | ECRIN (ClinicalTrials.gov) | |
| 25 | Includes target as one of a group of non-registered studies | This study includes <the target study>. That study is not registered independently, but instead shares this registry entry with one or more other non-registered studies. | ECRIN (BioLINCC) | |
| 26 | Non registered but included within a registered study group | This study is registered as <the target study>, along with one or more other studies that share the same registry entry and id. | ECRIN (BioLINCC) | |
| 27 | Has link listed in registry but nature of link unclear | This study is linked to <the target study> within the registry entry, but the nature of the linkage is not clear. | ECRIN (WHO) | |
| 28 | Includes target as one of a group of registered studies | This study includes <the target study>, which is registered elsewhere along with one or more other registered studies, forming a group that collectively equates to this study. | ECRIN (WHO) | |
| 29 | Registered and is included elsewhere in group | This study is also registered, along with one or more other studies that together form an equivalent group, as <the target study>. | ECRIN (WHO) | |
| 0 | Not yet known | Dummy value supplied by default on entity creation. | ECRIN |
