Red cell distribution width as a screening test in the diagnosis of beta thalassemia trait

2019 ◽  
Vol 11 (3) ◽  
pp. 158-162
Author(s):  
Divya Nagaram ◽  
◽  
Shahista Choudhary ◽  
Sampat Kumar ◽  
◽  
...  
Keyword(s):  
Screening Test ◽  
Red Cell Distribution Width ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Cell Distribution ◽  
Distribution Width ◽  
Thalassemia Trait

scholarly journals BETA THALASSEMIA TRAIT

2018 ◽  
Vol 25 (04) ◽  
pp. 545-550
Author(s):  
Muhammad Ihtesham Khan ◽  
Hamid Nawaz Khan ◽  
Muhammad Usman
Keyword(s):  
Study Design ◽  
Population Study ◽  
Screening Test ◽  
Descriptive Study ◽  
Discrimination Index ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Cell Distribution ◽  
Distribution Width ◽  
Thalassemia Trait

Objectives: To assess the sensitivity of the various discrimination indicesas screening test in beta-thalassemia trait patients in our population. Study design: Crosssectional descriptive study. Period: 1-Sep 2012 to 31-Jan 2013 (5 months). Settings: PathologyDepartment, District Head Quarters (DHQ) Hospital, Rawalpindi. Materials and Methods: Atotal of 150 diagnosed cases of beta thalassemia trait were included in the study. Study wasdone from 1-Sep 2012 to 31-Jan 2013 in DHQ hospital, Rawalpindi. Four discrimination indicesi.e. Mentzer, Shine & Lal, Srivastava, and Red cell Distribution Width Index were calculated forall the patients. The number of correctly identified cases were determined and sensitivity ofeach discrimination index was calculated accordingly. Results: The sensitivity in diagnosingbeta thalassemia trait patients was highest for Shine and Lal index (95%), followed by Mentzerindex (52% sensitivity), and then Srivasava index (46% sensitivity). Red cell distribution widthindex had poor sensitivity of 2% in our study. None of the discrimination indices showed 100%sensitivity. Conclusion: We concluded that Shine & Lal and Mentzer index are the most sensitiveindices. They can be used for cheap and quick screening of beta-thalassemia trait patients inlaboratories where advanced investigation tools are not available. Patients who give positiveresult for beta thalassemia trait with these indices may then be referred for further workup toconfirm the diagnosis.

scholarly journals DIAGNOSTIC EFFICACY OF RED BLOOD CELL INDICES IN DIAGNOSIS OF BETA THALASSEMIA TRAIT TAKING HAEMOGLOBIN ELECTROPHORESIS AS GOLD STANDARD

2021 ◽  
Vol 71 (3) ◽  
pp. 1006-10
Author(s):  
Sahar Rabbani ◽  
Muhammad Farooq ◽  
Samina Naeem ◽  
Nasir Uddin ◽  
Muhammad Abdul Naeem ◽  
...  
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Red Cell Distribution Width ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Cell Distribution ◽  
Diagnostic Efficacy ◽  
Mean Cell Volume ◽  
Distribution Width ◽  
Thalassemia Trait

Objective: To determine the diagnostic efficacy of haematological indices for the diagnosis of beta thalassemia trait taking haemoglobin electrophoresis as a gold standard. Study Design: Cross sectional study. Place and Duration of Study: Department of Haematology Combined Military Hospital Lahore, from Aug to Dec 2019. Methodology: Two hundred and six anaemic patients 20-70 years of age of both genders were included in the study. Blood was collected from all the patients and complete blood count were generated through automated haematology analyser Sysmex KX-21. Based on the complete blood count parameters like mean cell volume, red blood cell count, red cell distribution width and mean cell haemoglobinthe haematological indices such as Mentzer, Ricerca, mean density of Hb/litre of blood, mean cell Hb density and red cell distributon width indices were calculated. The haemoglobin A2 band of >3.5% on haemoglobin electrophoresis was taken as cut off for Beta thalassemia trait. Results: Out of the 206 blood samples analysed, 120 (58%) were labelled as Beta thalassemia trait after Hb electrophoresis and 86 cases had anemia due to other causes. Mentzer index established the highest sensitivity of 92.5% whereas RICERCA index established the highest specificity of 94.1%. Mentzer and red cell distribution width indexhad highest diagnostic efficacy value up to 90.3%. Conclusion: We conclude that Mentzer and red cell distribution width index showed the highest diagnostic significance. The Mentzer index has the highest sensitivity whereas Ricerca index has the highest specificity. The red blood cell count, haemoglobin and mean cell volume.............

scholarly journals Comparison of red cell distribution width and a red cell discriminant function incorporating volume dispersion for distinguishing iron deficiency from beta thalassemia trait in patients with microcytosis

1996 ◽  
Vol 114 (5) ◽  
pp. 1265-1269 ◽  
Author(s):  
Carmen Silvia Passos Lima ◽  
Aparecida Ribeiro de Carvalho Reis ◽  
Helena Zerlotti Wolf Grotto ◽  
Sara Teresinha Ollala Saad ◽  
Fernando Ferreira Costa
Keyword(s):  
Iron Deficiency ◽  
Iron Deficiency Anemia ◽  
Discriminant Function ◽  
Microcytic Anemia ◽  
Deficiency Anemia ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Cell Distribution ◽  
Distribution Width ◽  
Thalassemia Trait

The red cell distribution width (RDW), and another red cell discriminant function incorporating RDW (MCV² x RDW/Hgb x 100) were determined in a group of 30 patients with iron deficiency anemia, 30 patients with beta thalassemia trait, and 30 normal subjects. Both RDW and (MCV² x RDW/Hgb x 100) mean values were significantly higher in iron deficiency anemia than in beta thalassemia trait (p<0.001). Taking RDW equal or above 21.0 percent among microcytic anemia patients, we identified correctly 90.0 percent of patients with iron deficiency anemia. The sensitivity and specificity of the test were 90.0 percent (IC 95 percent: 0.75 - 0.96) and 77.0 percent (IC 95 percent: 0.60 - 0.88), respectively. RDW values below 21.0 percent identified correctly 77.0 percent of beta thalassemia trait with a sensitivity and a specificity of 77.0 percent (IC 95 percent: 0.60 - 0.88) and 90.0 percent (IC 95 percent: 0.75 - 0.96), respectively. Taking values of (MCV² x RDW/Hgb x 100) above and below 80.0 percent as indicative of iron deficiency and beta thalassemia trait, respectively, we identified correctly 97.0 percent of those patients in each group. Both sensitivity and specificity were 97.0 percent (IC 95 percent: 0.84 - 0.99). These results indicated that the red cell discriminant function incorporating volume dispersion (MCV² x RDW/Hgb x 100) is a highly sensitive and specific method in the initial screening of patients with microcytic anemia and is better than RDW in differentiating iron deficiency anemia from beta thalassemia trait.

scholarly journals Validation of new indices for differentiation between iron deficiency anemia and beta thalessemia trait, a study in pregnant females

2018 ◽  
Vol 4 (2) ◽  
pp. 26
Author(s):  
Sheetal Arora ◽  
Deepshikha Rana ◽  
Sachin Kolte ◽  
Leelawathi Dawson ◽  
Indrani Dhawan
Keyword(s):  
Iron Deficiency ◽  
Iron Deficiency Anemia ◽  
Red Cell Distribution Width ◽  
Deficiency Anemia ◽  
Beta Thalassemia ◽  
Red Cell ◽  
Cell Distribution ◽  
Distribution Width ◽  
Pregnant Females ◽  
Youden’S Index

<p class="abstract"><strong>Background:</strong> The two most frequent types of microcytic hypochromic anemia in developing countries are beta thalassemia trait (𝛽-TT) and iron deficiency anemia (IDA). Several indices using blood cell count parameters have been suggested to differentiate between two. In this study we evaluated the reliability of three indices.</p><p class="abstract"><strong>Methods:</strong> The present cross-sectional study was carried out in 300 pregnant females in third trimester. Out of these, 90 microcytic hypochromic females were selected. Mentzers index, red cell distribution width index and Matos and Carvalho index (MCI) were calculated from the regular 3-part analyser haematological parameters.  </p><p class="abstract"><strong>Results:</strong> The Mentzer index was the most reliable index, as it had the highest sensitivity (97.62%), specificity (66.67%), and Youden’s index (64%) for detecting Iron deficiency anaemia; the Matos and Carvalho Index showed higher sensitivity (98.81%)but a much lower specificity (33.3%) and Youden’s index (32%) while the red cell distribution width index showed the sensitivity and specificity of 92.86% and 66.67%, respectively with Youden’s index of 59%.</p><p class="abstract"><strong>Conclusions:</strong> The Mentzer index provided the highest reliabilities for differentiating<strong> </strong>IDA from 𝛽-TT. The new indices have high sensitivities and positive predictive value for identifying IDA, making them useful for screening population at risk. </p>

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