- The IFCC recommendation on estimation of reference intervals. The RefVal programHelge Erik Solberg
Department of Clinical Chemistry, Rikshospitalet, Oslo, Norway
Clin Chem Lab Med 42:710-4. 2004..This fifth recommendation deals with statistical methods used for analysis of reference values and estimation of reference intervals. The RefVal program, which implements the recommended method, is also described...
- [Common reference values]Helge Erik Solberg
Tidsskr Nor Laegeforen 124:1506. 2004
- Partitioning of nongaussian-distributed biochemical reference data into subgroupsAri Lahti
Department of Clinical Chemistry, Rikshospitalet University Hospital of Oslo, Oslo, Norway
Clin Chem 50:891-900. 2004..The aim of this study was to develop new methods for partitioning biochemical reference data, covering in particular nongaussian distributions...
- Detection of outliers in reference distributions: performance of Horn's algorithmHelge Erik Solberg
Department of Medical Biochemistry, Rikshospitalet Radiumhospitalet HF, Oslo, Norway
Clin Chem 51:2326-32. 2005..The algorithm operates in 2 steps: (a) mathematically transform the original data to approximate a gaussian distribution; and (b) establish detection limits (Tukey fences) based on the central part of the transformed distribution...