Calcium (Ca)

Included in meta analysis


González-Revaldería J., García-Bermejo S., Menchén-Herreros A., and Fernández-Rodriguez E, 1991, Clin Chem, 37, 596 , Towards narrower analytical goals in routine laboratory work


Total Score


Parameter Score
1. Scale A
2. Study Population A
3. Samples A
4. Measurand A
5. Pre-Analytical A
6. Replicate Analysis A
7. Steady State A
8. Outlier Analysis B
9. Normality B
10. Variance Homogeneity C
12. CI A
13. No of Results A
14. Concentrations A
15. Total Score C10

Item Details

Parameter Score
Matrix Serum
Measurand Calcium (Ca)
Unit mmol / L
Overall Analytical Principle Method Spectrophotometry; Other
Number of Subjects 15
Number of Subjects included in BV estimation 15
Ethinicity Caucasian
Age Mean / Median
Age Min
Age Max
Age SD
Number of Males 5
Number of Females 10
State of Well Being
Healthy (excl pregnant)
Study Duration Length 4
Study Duration Units Week
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Week
Sampling Times Start Time: 7:30
End Time: 8:00
Number of Samples 4
Average Number of Samples Used for BV Estimation 4.0
Average Number of Replicates 2.0
Estimates of CVi 2.39
Calculated Confidence Intervals of CVi Lower: 1.95, Upper: 3.05
Estimates of CVg 3.78
Calculated Confidence Intervals of CVg Lower: 2.65, Upper: 6.03
Analytical CV 0.9
Calculated Confidence Intervals of Analytical CV Lower: 0.76, Upper: 1.10
Measurand Mean 2.35
Measurand Min
Measurand Max
Measurand SD