Variable Details

Scaled? 

Not Scaled

Variable Type 

Longitudinal

Variable Name 

log_hil1ra

Categories

Blood Measures

IL-1RA level
Log transformed level of interleukin-1 receptor agonist

This variable is only available in MAP and MARS.

Interleukin-1 receptor agonist (IL-1RA) level is quantified from serum samples using highly sensitive multiplexed sandwich enzyme-linked immunosorbent assay (ELISA) arrays by Endogen Searchlight technologies (Billerica, MA). See the inflammatory markers subcategory description for more information.

The lower detection limit for MAP samples is 6.3 ng/mL.

This variable is expressed in ng/mL and is log transformed.

Notes: For MAP, values <6.3 ng/mL are coded to 6.0 ng/mL. For MARS, values <15.6 ng/mL are coded to 15.0 ng/mL.

Not recommended for combined analysis - use MAP only or MARS only