Baseline: Assessment ⏵ Blood sampling data
Category 12
Baseline: Assessment ⏵ Blood sampling data
Baseline: Assessment ⏵ Blood sampling data
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Notes
10mL blood samples were collected into single ethylene-diamine-tetraacetic acid (EDTA) tubes with barcoded identifiers, linked to each participant's record. Almost all study participants gave an adequate blood sample (Field 00066).Immediately post-collection, samples were placed in chilled insulated boxes and kept at a temperature of 4-10 degrees celsius. At the end of each day of recruitment, samples were sent to a central laboratory for refrigeration at 4 degrees celsius overnight. The following morning, samples were extracted and centrifuged, and plasma and buffy coat separated and stored in individual 1.8mL barcoded cryovials (Nunc A/S, Denmark) in -80 degrees celsuis freezers. The mean delay (at 4-10 degrees celsius) before separation was ~24 hours.
Samples were later transferred, by air freight in boxes over dry ice, for long term storage in Oxford (liquid nitrogen tanks at a temperature of -150 degrees celsuis).
3 Data-Fields
| Field ID | Description |
|---|---|
| 66 | Adequate blood sample taken |
| 67 | Date/time of blood sampling |
| 68 | Date/time of last meal |
1 Parent Category
| Category ID | Description | Items |
|---|---|---|
| 1 | Baseline: Assessment | 1+328 |