ACCREDITATION STATUS:

Full 17043 (ref 7586)

CLINICAL APPLICATION:

Assessment of vitamin K status

PURPOSE OF PROGRAMME:

Harmonisation of vitamin K status assessment

ANALYTES:

PROGRAMME OF ANALYSIS:

N/A

DATA ANALYSIS:

N/A

PERFORMANCE SCORING:

Grubbs test for outliers and Z scores

PERFORMANCE MONITORING:

N/A

PERSISTENT POOR PERFORMANCE:

Outlier or Z score > 3 for two consecutive rounds, Z score > 2 for three consecutive rounds.