Vitamin A

Included in meta analysis


Browne RW, Bloom MS, Schisterman EF, Hovey K, Trevisan M, Wu C, Liu A, Wactawski-Wende
 j, March 2008, Biomarkers, 13(2), 160-183 , Analytical and biological variation of biomarkers of oxidative stress during the menstrual cycle


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 C
9. Normality A
10. Variance Homogeneity A
12. CI A
13. No of Results A
14. Concentrations A
15. Total Score C8

Item Details

Parameter Score
Matrix Serum
Measurand Vitamin A
Unit ug / mL
Overall Analytical Principle Method Chromatography; HPLC
Number of Subjects 9
Number of Subjects included in BV estimation 9
Ethinicity Mixed
Age Mean / Median 38.5
Age Min 30.9
Age Max 44.8
Age SD
Number of Males
Number of Females 9
State of Well Being
Healthy (excl pregnant)
Study Duration Length 1
Study Duration Units Month
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Week
Sampling Times Start Time: 7:00
End Time: 8:30
Number of Samples 142
Average Number of Samples Used for BV Estimation 8.0
Average Number of Replicates 2.0
Estimates of CVi 5.51
Calculated Confidence Intervals of CVi Lower: 4.43, Upper: 6.93
Estimates of CVg 21.26
Calculated Confidence Intervals of CVg Lower: 14.54, Upper: 38.95
Analytical CV 3.82
Calculated Confidence Intervals of Analytical CV Lower: 3.29, Upper: 4.56
Measurand Mean 0.39
Measurand Min
Measurand Max
Measurand SD