Included in meta analysis


Costongs GMPJ, Janson PCW and Bas BM, 1985, J Clin Chem Clin Biochem, 23, 7-16 , Short-term and long-term intra-individual variations and critical differences of clinical chemical laboratory parameters


Total Score


Parameter Score
1. Scale A
2. Study Population A
3. Samples A
4. Measurand C
5. Pre-Analytical A
6. Replicate Analysis B
7. Steady State B
8. Outlier Analysis C
9. Normality B
10. Variance Homogeneity C
12. CI A
13. No of Results C
14. Concentrations A
15. Total Score C4,8,10,13

Item Details

Parameter Score
Matrix Serum
Measurand Ferritin
Unit ug / L
Overall Analytical Principle Method Unknown
Number of Subjects 274
Number of Subjects included in BV estimation 274
Ethinicity Unknown
Age Mean / Median
Age Min 18.0
Age Max 53.0
Age SD
Number of Males 148
Number of Females 126
State of Well Being
Healthy (excl pregnant)
Study Duration Length 16
Study Duration Units Month
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Month
Sampling Times Start Time:
End Time:
Number of Samples 6
Average Number of Samples Used for BV Estimation 6.0
Average Number of Replicates 1.0
Estimates of CVi 12.8
Calculated Confidence Intervals of CVi Lower: 11.60, Upper: 13.80
Estimates of CVg
Calculated Confidence Intervals of CVg Lower: , Upper:
Analytical CV 10.0
Calculated Confidence Intervals of Analytical CV Lower: 9.02, Upper: 11.21
Measurand Mean 74.0
Measurand Min
Measurand Max
Measurand SD