Assessment of vitamin K status
PURPOSE OF PROGRAMME:
Harmonisation of vitamin K status assessment
|K1 2 3-epoxide||ug/L|
MATERIAL PROVIDED: Single or Pooled, liquid serum with or without exogenous added analyte
DISTRIBUTIONS PER YEAR: 4
SAMPLES PER DISTRIBUTION: 3 (2 for pilot analytes)
FREQUENCY OF DISTRIBUTION: Quarterly
Details of the analysis procedures applied to data can be obtained from UK NEQAS Clinical Chemistry (Birmingham Quality) directly.
Telephone: +44 (0) 121 414 7300
Grubbs test for outliers and Z scores
PERSISTENT POOR PERFORMANCE:
Outlier or Z score > 3 for two consecutive rounds, Z score > 2 for three consecutive rounds.
Clinical Chemistry (Birmingham Quality)
The External Quality Assessment Scheme for Clinical Chemistry Birmingham was founded in 1969 by Professor Tom Whitehead at Queen Elizabeth Medical Centre, Birmingham. In 1969 the Service became known as the UK National External Quality Assessment Service for Clinical Chemistry Birmingham. UK NEQAS Birmingham is part of the University Hospitals Birmingham NHS Foundation Trust.