Vitamin A


Beaton GH, Jean Mimer J, McGuire V, Feather TE, Little JA, 1983, Am J Clin Nutr, 37(6), 986-95 , Source of variance in 24-hour dietary recall data: implications for nutrition study design and interpretation. Carbohydrate sources, vitamins, and minerals


Total Score


Parameter Score
1. Scale A
2. Study Population D
3. Samples NA
4. Measurand NA
5. Pre-Analytical NA
6. Replicate Analysis NA
7. Steady State NA
8. Outlier Analysis NA
9. Normality NA
10. Variance Homogeneity NA
12. CI NA
13. No of Results NA
14. Concentrations NA
15. Total Score D2

Item Details

Parameter Score
Matrix Serum/plasma
Measurand Vitamin A
Unit IU / per day
Overall Analytical Principle Method Unknown
Number of Subjects 60
Number of Subjects included in BV estimation 60
Ethinicity Caucasian
Age Mean / Median
Age Min 25.0
Age Max 44.0
Age SD
Number of Males 30
Number of Females 30
State of Well Being
Healthy (excl pregnant)
Study Duration Length
Study Duration Units Day
Sampling Intervals, e.g. X sample(s) per Interval Unit
Interval Units Week
Sampling Times Start Time:
End Time:
Number of Samples
Average Number of Samples Used for BV Estimation
Average Number of Replicates
Estimates of CVi
Calculated Confidence Intervals of CVi Lower: , Upper:
Estimates of CVg
Calculated Confidence Intervals of CVg Lower: , Upper:
Analytical CV
Calculated Confidence Intervals of Analytical CV Lower: , Upper:
Measurand Mean
Measurand Min
Measurand Max
Measurand SD