Evaluation of Serum and Salivary Iron and Ferritin Levels in Children with Dental Caries: A Meta-Analysis and Trial Sequential Analysis

Background and objective: Dental caries appears to be related to iron deficiency anemia and to low ferritin levels. In the present meta-analysis, we report salivary and serum iron and ferritin levels in children with dental caries, compared to healthy controls. Materials and methods: We searched in Web of Science, Cochrane Library, Scopus, and PubMed/Medline databases to extract studies published until 25 July 2021. We calculated mean differences (MD) and 95% confidence intervals (CI) of salivary and serum iron and ferritin levels in children with dental caries, always compared to healthy controls. In addition, we applied a trial sequential analysis (TSA). Results: A total of twelve articles covering thirteen studies were included in the meta-analysis. The pooled MD for salivary iron level was −5.76 µg/dL (p = 0.57), and −27.70 µg/dL (p < 0.00001) for serum iron level: compared to healthy controls, children with dental caries did not show different salivary iron levels, while children with caries had significantly lower serum iron levels. The pooled MD of salivary ferritin level was 34.84 µg/dL (p = 0.28), and the pooled MD of serum ferritin level was −8.95 µg/L (p = 0.04): compared to healthy controls, children with dental caries did not have different salivary iron levels, but significantly lower serum ferritin levels. Conclusions: The findings of the present meta-analysis showed that salivary levels of iron and ferritin did not differ between children with and without caries, though compared to healthy controls, children with caries had significantly lower salivary and serum iron and ferritin levels. The results are of practical and clinical importance: Possibly, iron and ferritin supplementation might prevent or attenuate dental caries in children at risk. Further, children with caries might suffer from further iron- and ferritin-related health issues. Lastly, serum blood samples, but not saliva samples inform accurately about the current iron and ferritin concentrations in children with or without caries.

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The Potential Clinical Significance of the Serum Iron and Ferritin Status in Lung Cancer Patients

journal of nutritional oncology ◽

10.34175/jno202004006 ◽

2020 ◽

Vol 5 (4) ◽

pp. 189-195

Author(s):

Fei Fei Guo ◽

◽

Shi Jia Cheng ◽

Yi Ning Liu ◽

Jiu Wei Cui ◽

...

Keyword(s):

Lung Cancer ◽

Cancer Patients ◽

Serum Ferritin ◽

Serum Iron ◽

Serum Ferritin Level ◽

Ferritin Level ◽

Stage Iv ◽

Iron Level ◽

Serum Iron Level ◽

Lung Cancer Patients

Background An increasing number of studies have shown that iron, one of the indispensable trace elements in the human body, is closely related to the occurrence and development of cancer. However, few studies have clearly demonstrated the role of the iron levels in lung cancer patients, or the potential effects of inflammation on iron levels. Methods The clinical data for lung cancer patients and non-lung cancer participants were retrospectively analyzed. The serum iron and ferritin levels were measured and compared using a rank-sum test. The correlation between the serum iron/ferritin and C-reactive protein (CRP) was analyzed by rank correlation. The cut-off values for continuous variables were obtained by the receiver operating characteristic curve (ROC) method. An analysis of potential prognostic factors in lung cancer patients was conducted by univariate and multivariate survival analyses. Results The serum iron levels in patients with extensive small-cell lung cancer (SCLC) were lower than those with limited-stage SCLC, and the levels of serum ferritin and CRP in those with extensive SCLC were higher than those with limited-stage SCLC. Similarly, the serum iron levels in patients with stage IV non-small cell lung cancer (NSCLC) were lower than those of patients with stage Ⅰ-Ⅲ disease, and the levels of serum ferritin and CRP in those with stage IV NSCLC were higher than those in stages Ⅰ-Ⅲ. The serum iron level was negatively correlated with the level of CRP, while the serum ferritin level was positively correlated with CRP. The stage of lung cancer, but not the serum iron/ ferritin level, was an independent prognostic factor in lung cancer patients. Conclusions The serum iron and ferritin levels are associated with the staging of lung cancer. The later stages of lung cancer are associated with a lower serum iron level, a higher serum ferritin level, and a higher CRP level. Inflammation may play an important role in regulating the serum iron and ferritin levels in lung cancer patients.

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Haemoglobin, Serum Iron Level and Cardiovascular Status in Advanced Stages of Chronic Kidney Disease Patients admitted in A Tertiary Care Centre

Bangladesh Journal of Medicine ◽

10.3329/bjm.v33i1.56787 ◽

2021 ◽

Vol 33 (1) ◽

pp. 34-39

Author(s):

Md Yousuf Ali ◽

Md Ehsanul Alam ◽

Aminur Rahman ◽

Nadira Majid

Keyword(s):

Haemoglobin Level ◽

Serum Ferritin ◽

Serum Iron ◽

Ferritin Level ◽

Iron Level ◽

Serum Iron Level ◽

Number Of Patients ◽

Significant Difference ◽

History Of ◽

Advanced Stages

Background: Anaemia due to advanced stages of chronic kidney disease increases morbidity of patients. Early detection and correction of anaemia may be helpful in preventing the progress of the disease & its cardiovascular outcomes. The objective of this study was to evaluate hemoglobin, serum iron level and cardiovascular status in advanced of CKD patients. Methods: This was a cross sectional observational study on 150 cases of diagnosed advanced stages (3B,4 &5) of CKD patients in indoor of department of medicine of Mitford Hospital, Dhaka from July 2019 to January 2020. Convenience sampling was done. Data were analyzed with SPSS 26. Results: Total number of patients were 150. Male were 93 (62%) and female were 57 (38%). The mean (±SD) age was 55.22 (±10.30) years (range 33 - 75 years). Among the study subjects 38% had history of blood transfusion, 60% had history of iron supplementation and 12% subjects received erythropoietin. Mean (±SD) haemoglobin level was 7.61 (±2.54) g/dl. Seventy percent of the study subjects had haemoglobin level < 9 g/dl and rest had ³9 g/dl. Significant difference was found in between these two groups (p = 0.036). In the present study, mean (±SD) serum iron level was 15.59 (±07.39) μmol/l. In 46% of the study subjects, iron level was 7.3μ mol/l and 52% had iron level between 7.3 to 23.6 μmole/ lit. Mean (± SD) ferritin level of the study subjects was 155.22 (±92.32) ng/ ml. In 58% of the study subjects ferritin level was < 100ng/ ml and 42% had >100 ng/ml. Significant difference was found in between these two groups (p = 0.041) (Table-IV). Ferritin level had significant positive relationship with blood transfusion, iron and erythropoietin supplementation on logistic regression analysis. Haemoglobin and serum ferritin level was positively correlated with eGFR of the study subjects. Statistical analysis showed significant relationship between eGFR with haemoglobin and serum ferritin. Forty six percent of the study subjects had Transferrin saturation (TSAT) level below 20%. Fifty four percent subjects had a TSAT level above 20%. Significant difference was found in between these two groups (p = 0.001). In correlation analysis, haemoglobin, serum ferritin and TSAT level in the study subjects had negative relationship with duration of CKD in years. Relationship of haemoglobin and TSAT level with duration of CKD was statistically significant. In correlation analysis, serum TIBC level had negative relationship with haemoglobin level which was statistically significant. Serum iron, ferritin and TSAT level in the study subjects were positively correlated with haemoglobin level. Relationship of haemoglobin with serum iron level and TSAT level was statistically significant. Twenty percent of the study subjects had peripheral vascular disease, 111 (74%) of the study subjects had hypertension, 66 (44%) had ischaemic heart disease, 27 (18%) had a history of acute myocardial infarction, 24 (16%) had chronic heart failure, 93 (62%) had dyslipidemia and 27 (18%) patients had history of stroke. Conclusion: In this study it was observed that TSAT appears to be a more useful indicator for measuring the frequency of iron deficiency than serum iron, TIBC and serum ferritin. The cardiovascular comorbidities plagued significant number of patients with advanced CKD. Bangladesh J Medicine July 2022; 33(1) : 34-39

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