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Differential Diagnostic Study of Iron Deficiency Anemia and Thalassemia Based on Logistic Regression Modeling |
LI Yi-xun1,2,3,GUO Chong1,2,3,PAN Yu-qing1,2,3,CHENG Shen-ju1,2,3,WU Kun1,2,3,**() |
1 Department of Clinical Laboratory, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China 2 Yunnan Key Laboratory of Laboratory Medicine, Kunming 650032, China 3 Yunnan Province Clinical Research Center for Laboratory Medicine, Kunming 650032, China |
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Abstract Objective: The objective of the research is to establish a logistic regression model for the differential diagnosis of iron deficiency anemia (IDA) and thalassemia (TT) and to explore its application value. Methods: The research analyzed medical records of 121 patients diagnosed with both IDA and TT at the First Affiliated Hospital of Kunming Medical University between 2021 and 2022. A total of 100 specimens were arbitrarily chosen from each cohort to constitute the experimental groups, while the remaining 21 were designated for validation reasons. After performing a univariate comparison to establish statistical significance, the subsequent action was to identify variables with significant differences for the multi-factor analysis. Based on the analysis, four variables - gender, hemoglobin, mean corpuscular hemoglobin concentration, and red cell distribution width - were identified as independent factors that influence the outcome. These four variables established a logistic regression model, which was evaluated for its differential diagnosis effect by analyzing sensitivity, specificity, and other indicators on a subject’s working characteristics curve. Results: The results of the univariate comparison illustrate that the IDA group has lower values of red blood cells, hemoglobin, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, and mean corpuscular hemoglobin concentration in their peripheral blood compared to the TT group. Conversely, higher values of peripheral blood red cell distribution width-standard deviation are observed in the IDA group in comparison to the TT group, and the difference is statistically significant with a P-value less than 0.05. Gender, hemoglobin (Hb), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), and red cell distribution width (RDW-SD) were analyzed via binary non-conditional logistic regression. The study showed that higher RDW-SD values were linked to an increased risk of IDA, while more significant reductions in Hb and MCHC were associated with a higher risk of IDA at a significance level of P<0.05. The logistic regression model is presented as:Logit(P)=-19.288-1.685X1+0.035X2+0.066X3-0.076X4. In the experimental group, the area under the receiver operating characteristic (ROC) curve of the logistic model is 0.947, the sensitivity is 90%, and the specificity is 91%; the sensitivity and specificity of the verification group are 100% and 72.4%, respectively. Conclusions: Logistic regression models have certain application value in the differential diagnosis of IDA and TT.
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Received: 14 October 2023
Published: 16 January 2024
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