25-hydroxy vitamin D3

Reference

Reference
Lacher DA, Hughes JP and Carroll MD, 2010, National Health Statistics Reports , 21, , Biological variation of laboratory analytes based on the 1999–2002 National Health and Nutrition Examination Survey

Scoring

Total Score

C5,7,10

Parameter Score
1. Scale A
2. Study Population A
3. Samples A
4. Measurand A
5. Pre-Analytical C
6. Replicate Analysis B
7. Steady State C
8. Outlier Analysis A
9. Normality B
10. Variance Homogeneity C
11. ANOVA B
12. CI A
13. No of Results A
14. Concentrations A
15. Total Score C5,7,10
Comment

Item Details

Parameter Score
Matrix Serum
Measurand 25-hydroxy vitamin D3
Unit ng / mL
Overall Analytical Principle Method Spectrophotometry; UV/VISIBLE
Number of Subjects 248
Number of Subjects included in BV estimation 248
Ethinicity Hispanic or Latino
Age Mean / Median
Age Min 16.0
Age Max 69.0
Age SD
Number of Males
Number of Females 248
State of Well Being
Healthy (excl pregnant)
Diseases
Study Duration Length 36
Study Duration Units Month
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Other
Sampling Times Start Time:
End Time:
Number of Samples 2
Average Number of Samples Used for BV Estimation 2.0
Average Number of Replicates 1.0
Estimates of CVi 11.6
Calculated Confidence Intervals of CVi Lower: 9.48, Upper: 13.36
Estimates of CVg
Calculated Confidence Intervals of CVg Lower: , Upper:
Analytical CV 8.2
Calculated Confidence Intervals of Analytical CV Lower: 6.85, Upper: 10.22
Measurand Mean 20.7
Measurand Min
Measurand Max
Measurand SD

Coding