Introduction to the Golden Base
The registry, its data sources, and their harmonisation.
TraumaBase is a French registry dedicated to patients with severe trauma. It brings together data from participating centres to support research and better understand their care.
The Golden Base is the harmonised dataset produced from MediaXtend, CleanWeb V1, and CleanWeb V2. This documentation describes the data and the rules needed to interpret them.
Data sources
TraumaBase comprises three successive databases. Over time, variables have been added or removed, some formats and definitions have changed, and relationships between data have become more structured.
MediaXtend
9,882 patients
Permanently closed01CleanWeb V1
18,145 patients
Permanently closed02CleanWeb V2
37,700 patients
Collection ongoing0365,727 patients in total across the three sources, as of .
Differences between sources
A data pipeline aligns and processes the three sources to construct the Golden Base. Some definitions have changed over time and need to be considered in the analysis.
Some examples of differences between the sources:
CHOC_HEMORRAG_V1≥ 4 RBC unitsCHOC_HEMORRAG_V2≥ 1 RBC unitDuring the first six hours
Both variables are retained to make this change in definition explicit.
These collection methods should inform the assessment of the quality of dates and time intervals.
Some variables absent from the older sources are collected in CleanWeb V2. For example:
- Presence of external hemorrhage
HEMORRAGIE_EXTERNE - Clinical frailty before the accident (CFS)
FRAILTY_SCALE
- MediaXtend
- Not collected
- CleanWeb V1
- Not collected
- CleanWeb V2
- Collected
The collection start date differs for each variable.
Preparing the Golden Base
The dataset is prepared in three phases: combine the sources, apply clinical rules, then calculate variables that require previously processed data.
- MediaXtendCleanWeb V1CleanWeb V2
- Phase 1PreprocessingColumn alignment and combination of sources
- Raw BaseCombined raw data from the three sources
- Phase 2ProcessingValue normalisation and application of clinical and data-handling rules
- Phase 3Post-processingCalculation of variables that require processed data: TRISS, probability of death…
- Golden BaseHarmonised data
