Percentile values of serum zinc concentration and prevalence of its deficiency in Iranian children and adolescents: the CASPIAN-V study
-
Bahar Azemati
,
Hadith Rastad
Abstract
Background
To determine the prevalence of serum zinc deficiency and provide the age- and sex-specific percentile values of serum zinc in children and adolescents.
Methods
We used the gathered data through the CASPIAN-V study, a national survey conducted on 3500 students aged 7–18 years from 30 provinces of Iran. In this study, 1370 blood samples were selected randomly, and serum zinc concentration was measured using a Hitachi automated analyzer. Zinc deficiency was defined as a serum zinc level of less than 75 μg/dL. Age-sex specific reference percentile values were developed for serum zinc concentration.
Results
The mean age of participants was 12.4 ± 3.0 years; 49.3% were girls and 73% were urban inhabitants. Mean (standard deviation [SD]) of serum zinc concentration was 107.23 (25.81) μg/dL with a significant sex difference; 109.03 ± 26.12 μg/dL for males compared to 105.41 ± 25.3 μg/dL for females (p = 0.009). The prevalence of subclinical zinc deficiency was 4.9% (95% confidence intervals [CI]: 3.0, 6.9) in children and adolescents. Both zinc deficient and sufficient groups were similar in terms of age, sex and residential areas (all p-value > 0.05). Overall, the 5th and 95th percentile values for serum zinc were 68.28 and 151.87 μg/dL, respectively. The value of all percentiles consistently decreased with age. The 10–99th percentile values for serum zinc were greater in boys than girls at all ages.
Conclusions
Nearly 5% of subjects had zinc deficiency. Age-sex specific percentile values were established for Iranian children and adolescents.
Acknowledgments
This nationwide survey was performed in Iran with the cooperation of the Ministry of Education and Training, the Ministry of Health and Medical Education, the Child Health Promotion Research Center, Isfahan University of Medical Sciences, and Alborz University of Medical Sciences (Project number: 194049).
Author contributions: B.A., R.H., M.Q and R.K. substantially contributed to the conception and design, data analysis and interpretation, drafted the manuscript, and revised it critically. M.Kh. coordinated the data collection and carried out the analysis. H.R, G.Sh., and M.Q. participated in preparing the manuscript. All authors read and approved the final version of the manuscript.
Research funding: This study was funded by National Institute for Medical Research Development, Grant no. 958355, and Alborz University of Medical Sciences.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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©2020 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Review
- Prevalence of obesity and overweight in Iranian students: a systematic review and meta-analysis
- Original Articles
- Trends in pediatric obesity management, a survey from the Pediatric Endocrine Society Obesity Committee
- Utility of MR proton density fat fraction and its correlation with ultrasonography and biochemical markers in nonalcoholic fatty liver disease in overweight adolescents
- Vitamin D status and its relation to insulin resistance in a Mexican pediatric population
- Elevated serum uric acid, hyperuricaemia and dietary patterns among adolescents in mainland China
- Is there a relationship between the dietary inflammatory index and metabolic syndrome among adolescents?
- New insights into the expression of androgen and estrogen receptors of the appendix testis in congenital cryptorchidism
- General properties of autoimmune thyroid diseases and associated morbidities
- Comparison of leptin levels in neonates born to mothers with high or low gestational weight gain
- Percentile values of serum zinc concentration and prevalence of its deficiency in Iranian children and adolescents: the CASPIAN-V study
- Nine-year overview of dyslipidemia management in children with heterozygous familial hypercholesterolemia: a university hospital outpatient lipid clinic project in Northwestern Greece
- Gesell Developmental Schedules scores and the relevant factors in children with Down syndrome
- Letters to the Editor
- Society for Pediatric Radiology (SPR) Child Abuse Committee response regarding Miller, Stolfi and Ayoub’s flawed theories about child abuse and metabolic bone disease
- Reply of Miller and Ayoub to Brown et al. Letter to the Editor
- Case Reports
- Identification of two novel variants in GAA underlying infantile-onset Pompe disease in two Pakistani families
- Hereditary vitamin D-resistant rickets: a report of four cases with two novel variants in the VDR gene and successful use of intermittent intravenous calcium via a peripheral route
- Variant analysis of HPD genes from two families showing elevated tyrosine upon newborn screening by tandem mass spectrometry (MS/MS)
- Challenges in the management of an ignored cause of hyperammonemic encephalopathy: pyruvate carboxylase deficiency
- Autoimmune polyglandular syndrome type II with co-manifestation of Addison’s and Graves’ disease in a 15-year-old boy: case report and literature review
Articles in the same Issue
- Frontmatter
- Review
- Prevalence of obesity and overweight in Iranian students: a systematic review and meta-analysis
- Original Articles
- Trends in pediatric obesity management, a survey from the Pediatric Endocrine Society Obesity Committee
- Utility of MR proton density fat fraction and its correlation with ultrasonography and biochemical markers in nonalcoholic fatty liver disease in overweight adolescents
- Vitamin D status and its relation to insulin resistance in a Mexican pediatric population
- Elevated serum uric acid, hyperuricaemia and dietary patterns among adolescents in mainland China
- Is there a relationship between the dietary inflammatory index and metabolic syndrome among adolescents?
- New insights into the expression of androgen and estrogen receptors of the appendix testis in congenital cryptorchidism
- General properties of autoimmune thyroid diseases and associated morbidities
- Comparison of leptin levels in neonates born to mothers with high or low gestational weight gain
- Percentile values of serum zinc concentration and prevalence of its deficiency in Iranian children and adolescents: the CASPIAN-V study
- Nine-year overview of dyslipidemia management in children with heterozygous familial hypercholesterolemia: a university hospital outpatient lipid clinic project in Northwestern Greece
- Gesell Developmental Schedules scores and the relevant factors in children with Down syndrome
- Letters to the Editor
- Society for Pediatric Radiology (SPR) Child Abuse Committee response regarding Miller, Stolfi and Ayoub’s flawed theories about child abuse and metabolic bone disease
- Reply of Miller and Ayoub to Brown et al. Letter to the Editor
- Case Reports
- Identification of two novel variants in GAA underlying infantile-onset Pompe disease in two Pakistani families
- Hereditary vitamin D-resistant rickets: a report of four cases with two novel variants in the VDR gene and successful use of intermittent intravenous calcium via a peripheral route
- Variant analysis of HPD genes from two families showing elevated tyrosine upon newborn screening by tandem mass spectrometry (MS/MS)
- Challenges in the management of an ignored cause of hyperammonemic encephalopathy: pyruvate carboxylase deficiency
- Autoimmune polyglandular syndrome type II with co-manifestation of Addison’s and Graves’ disease in a 15-year-old boy: case report and literature review
