Robust reference intervals for Liver function test (LFT) analytes in newborns and infants

BMC Research Notes

Samuel Kinde³  Tilahun Teka³  Tatek Gebreegziabher¹  Shawel Asrat³  Paulos Nigussie⁴  Mahilet Yigeremu³  Mulugeta Melkie² 

[1] Tikur Anbessa Specialized Hospital, Addis Ababa, Addis ababa, Ethiopia;Department of Medical Laboratory Science, Arbaminch University, Arbaminch, Ethiopia;Faculty of Medicine, Addis Ababa University, Addis ababa, Ethiopia;Ethiopian Health and Nutrition Research Institute, Addis Ababa, Addis ababa, Ethiopia

关键词: Cord blood;    Infants;    Newborns;    Robust method;    Liver function test;    Reference intervals;   

Others  :  1165745
DOI  :  10.1186/1756-0500-5-493

 received in 2012-01-27, accepted in 2012-08-31,  发布年份 2012

【 摘 要 】

Background

Reference intervals (RIs) are ranges of upper and lower limits of a given analyte which are used for a laboratory test to determine whether a disease is present or absent or to know if the patient is at risk for future disease states. In Ethiopia, a country with highly diversified population groups and geographical sites, there are no established RIs to metabolic analytes including the liver function test (LFT) analytes for the pediatric population though it has been known that liver function assessment in this population is vital as a result of varied vulnerability to both endogenous and xenobiotic substances.

Methods

A cross sectional study was conducted in Tikur Anbessa Specialized Hospital (TASH) and Teklehaymanot Health Center (THC) from November 2010 to April 2011. 117 cord blood (from newborns) and venous blood samples (from infants) were collected and analyzed using HumaStar 300. All pre-analytical, analytical and post-analytical aspects were thoroughly controlled. A robust, CLSI/ IFCC recommended, method was used for the determination of upper and lower end points covering 95% of the reference values of each analyte with respective 90% CIs using MedCalc® software.

Results

Combined RIs for newborns and infants were established for albumin, AST, ALP, direct bilirubin and total bilirubin to be 3.88-5.82 g/dl, 16.1-55.4U/l, 130-831U/l, <0.41 mg/dl and <1.37 mg/dl respectively. But, separated RIs were indicated for ALT and GGT as 1.2-23.1U/l and 6.94-24.8U/l ALT; and 30.6-160.7U/L and 10–28.2U/l GGT for newborns and infants respectively. Some maternal and infantile factors were identified to affect the values of analytes.

Conclusion

Almost all analytes were different from previously reported values for other target population of similar age group, kit insert values and adult values. So, interpretation of values of these analytes in newborns and infants of Ethiopian population sounds better to be performed by using such RIs taking the effect of some maternal and infantile factors in to account.

【 授权许可】

   
2012 Melkie et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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