Included in meta analysis


McArthur JO,Tang HM, Petocz P, Samman S, 2013, Nutrients, 5(9), 3634-45. , Biological variability and impact of oral contraceptives on vitamins B(6), B(12) and folate status in women of reproductive age


Total Score


Parameter Score
1. Scale A
2. Study Population C
3. Samples A
4. Measurand C
5. Pre-Analytical C
6. Replicate Analysis C
7. Steady State B
8. Outlier Analysis C
9. Normality B
10. Variance Homogeneity C
12. CI C
13. No of Results C
14. Concentrations A
15. Total Score C2,4,5,6,8,10,12,13

Item Details

Parameter Score
Matrix Serum
Measurand Folate
Unit nmol / L
Overall Analytical Principle Method Immunoassay; Not specified
Number of Subjects 22
Number of Subjects included in BV estimation
Ethinicity Unknown
Age Mean / Median
Age Min 18.0
Age Max 35.0
Age SD
Number of Males
Number of Females 22
State of Well Being
Healthy (excl pregnant)
Study Duration Length 12
Study Duration Units Week
Sampling Intervals, e.g. X sample(s) per Interval Unit 4
Interval Units Week
Sampling Times Start Time: 7:30
End Time: 9:30
Number of Samples
Average Number of Samples Used for BV Estimation
Average Number of Replicates
Estimates of CVi 20.4
Calculated Confidence Intervals of CVi Lower: , Upper:
Estimates of CVg 36.8
Calculated Confidence Intervals of CVg Lower: , Upper:
Analytical CV
Calculated Confidence Intervals of Analytical CV Lower: , Upper:
Measurand Mean 61.0
Measurand Min
Measurand Max
Measurand SD