Urea

Reference

Reference
Pineda-Tenor D , Laserna-Mendieta EJ, Timon-Zapata J, Rodelgo-Jimenez L, Ramos-Corral R, Recio-Montealegre A and Gomez-Serranillos Reus M, 2013, Clin Chem Lab Med, 51, 851-62 , Biological variation and reference change value of common clinical chemistry and haematologic laboratory analytes in the eldery population

Scoring

Total Score

C8

Parameter Score
1. Scale A
2. Study Population A
3. Samples A
4. Measurand A
5. Pre-Analytical A
6. Replicate Analysis B
7. Steady State B
8. Outlier Analysis C
9. Normality B
10. Variance Homogeneity A
11. ANOVA A
12. CI A
13. No of Results B
14. Concentrations A
15. Total Score C8
Comment

Item Details

Parameter Score
Matrix Serum
Measurand Urea
Unit mmol / L
Overall Analytical Principle Method Enzymatic analysis - Not specified
Number of Subjects 64
Number of Subjects included in BV estimation 64
Ethinicity Unknown
Age Mean / Median
Age Min 80.0
Age Max 92.0
Age SD
Number of Males
Number of Females 64
State of Well Being Healthy (excl pregnant)
Study Duration Length 28
Study Duration Units Day
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Week
Sampling Times Start Time: 08:00
End Time: 10:00
Number of Samples 4
Average Number of Samples Used for BV Estimation 4.0
Average Number of Replicates 1.0
Estimates of CVi 14.7
Calculated Confidence Intervals of CVi Lower: 13.25, Upper: 16.43
Estimates of CVg 20.1
Calculated Confidence Intervals of CVg Lower: 16.66, Upper: 24.84
Analytical CV 3.6
Calculated Confidence Intervals of Analytical CV Lower: 2.82, Upper: 4.97
Measurand Mean 5.0
Measurand Min
Measurand Max
Measurand SD

Coding

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