All measurements and recalculated results were reported to the SKZL for central data analysis.
Again, all raw data and/or recalculated data were reported to the SKZL for central data analysis.
Hence, it was decided to scale up the production of the PRM 15 arm, the original NCCLS C37-A material, for field evaluation and to perform a national commutability study and two national harmonization studies using PRM 2, a prototype of the lyophilized, sucrose-containing survey materials of the SKZL, and PRM 3, a prototype of the regularly frozen survey materials of the SKZL, for comparison.
To this end, the regular SKZL survey facilities were used.
To follow up the national lipid harmonization projects presented in this study and to further improve accuracy of lipid and apolipoprotein measurements in The Netherlands, the SKZL and the Lipid Task Force of Calibration 2000 recently appealed to the regional clinical chemistry societies to motivate their professionals to further diminish lipid and lipoprotein method biases by periodically (e.
The SKZL also advocates the NCCLS C37-A reference material to professionals in the field to independently assess their lipid or apolipoprotein calibration whenever they run into trouble.
Nonstandard abbreviations: HDL-C and LDL-C, HDL- and LDL-cholesterol; apo A-I and B, apolipoprotein A-I and B; EQAS, external quality assessment scheme; PRM, potential reference material; NCEP, National Cholesterol Education Program; CHOD-PAP, cholesterol oxidase-phenol aminophenazone, GPO-PAP, glycerophosphate oxidase-phenol aminophenazone; SKZL, Dutch Foundation for Quality Assessment in Clinical Laboratories; Lp(a), lipoprotein(a); [SD.