FNIH Biomarkers Consortium Plasma Abeta Project: Wash U

FNIH Biomarkers Consortium Plasma Abeta Project: Wash U

data(plasma_abeta_project_wash_u)

Format

A data frame with 130 rows and 27 variables

Details

A dataset with variables as follows:

  • RID -4 -4 Participant roster ID

  • VISCODE -4 -4 Visit code

  • VISCODE2 -4 -4 Translated visit code

  • EXAMDATE -4 -4 Examination Date

  • GUSPECID -4 -4 -4

  • VID -4 -4 -4

  • DER -4 -4 -4

  • DRAWTIME -4 -4 -4

  • FILE_NAME_NE -4 -4 -4

  • LC_MS_SAMPLE_ID -4 -4 Internal ID of LS_MS sample to control for technical replicates. It serves as internal blinding ID and for QC purpocess

  • SAMPLE_TYPE -4 -4 Type of LC_MS sample (FNIH Clinical Plasma; FNIH QC; FNIH CSF; QC Calibrator)

  • INJECTION -4 -4 injection (technical replicate) 1-st denoted as 'a'; second as 'b' ei.

  • INSTRUMENT -4 -4 Masspectrometer (Lumos; Altis)

  • BATCH -4 -4 Indicates the batch in which the sample was processed (prepped) for LC-MSMS

  • ASSAY -4 -4 Experiment file name

  • ASSAY_IP_PROTOCOL -4 -4 Sample processing protocol

  • QC_STATUS -4 -4 Status of samples assign by quality control comitte (Passed; Failed). If failed, samples should not be used for further analysis

  • QC_FLAGS -4 -4 None or one or many QC flags assigned by QC comitte when sample does not meet respective quality criterias

  • QC_COMMENT -4 -4 Detailed description of QC decision if applicable

  • MS_RUN_DATE -4 -4 date when sequense get started to run on LC-MSMS

  • AB40 -4 -4 raw plasma A40 concentration, ng/ml (those are not standardized and should not be used for analysis)

  • AB42 -4 -4 raw plasma A42 concentration, ng/ml (those are not standardized and should not be used for analysis)

  • PLASMAAB4240 -4 -4 Concentration ratio of 42/40 as measured by Di-oxidized C-terminal peptides, based on its relation to respective known concentrations of N15 internal standard

  • STANDARDIZED_PLASMAAB42 -4 -4 Standardized plasma A42 concentration, ng/ml

  • STANDARDIZED_PLASMAAB40 -4 -4 Standardized plasma A40 concentration, ng/ml

  • STANDARDIZEAB42_STANDARDIZEDAB40 -4 -4 -4

  • STANDARDIZED_PLASMAAB4240 -4 -4 The standardized_plasmaAB4240 variable should be used for analyses. This value is the measured abeta 42/40 by our lab.

Examples

if (FALSE) {
describe(plasma_abeta_project_wash_u)
}