Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India
Objective: The study objective was to compare haemoglobin measurements between the NBM 200 (non-invasive haemoglobin sensor) and Sahli’s hemometer in adolescent girls in a rural Indian setting. Methods: Participants included girls aged between 13 to 17 years from 34 villages in Tuljapur and Lohar...
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BMJ
2016
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| Online Access: | https://eprints.nottingham.ac.uk/35528/ |
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| author | Ahankari, Anand S. Dixit, J.V. Fogarty, Andrew W. Tata, Laila J. Myles, Puja R. |
| author_facet | Ahankari, Anand S. Dixit, J.V. Fogarty, Andrew W. Tata, Laila J. Myles, Puja R. |
| author_sort | Ahankari, Anand S. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Objective: The study objective was to compare haemoglobin measurements between the NBM 200 (non-invasive haemoglobin sensor) and Sahli’s hemometer in adolescent girls in a rural Indian setting.
Methods: Participants included girls aged between 13 to 17 years from 34 villages in Tuljapur and Lohara blocks of Osmanabad district, Maharashtra, India. Haemoglobin (Hb) measurements from the non-invasive sensor (NBM 200) were compared with measurements obtained from Sahli’s hemometer using Bland-Altman plot, Spearman correlation coefficient, sensitivity, specificity, and area under the receiver operating characteristic curve analysis (AUROC).
Results: Paired measurements from both methods were obtained from 766 adolescent girls (N=766). Haemoglobin levels estimated by Sahli’s hemometer ranged from 5.0 g/dL to 14.0 g/dL (mean: 10.1 g/dL, standard deviation (SD): 1.41), whereas measurements obtained from the NBM 200 ranged from 9.5 g/dL to 15.2 g/dL (mean: 12.8 g/dL, SD: 1.42). The Bland-Altman analysis indicated a mean difference of -2.70 g/dL (95% Confidence Intervals: -2.84 to -2.55) demonstrating an overestimation of Hb measurement by the NBM 200 compared to the Sahli’s hemometer measurements. The NBM 200 showed low sensitivity (23.6%) and moderate specificity (61.8%) for the diagnosis of anaemia. The AUROC score was 0.43 indicating an underestimation of anaemia in our study population by the NBM 200.
Conclusion: Haemoglobin measurements obtained from the NBM 200 were consistently higher leading to an underestimation of anaemia prevalence compared with Sahli’s hemometer estimates among adolescent girls in India. |
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| format | Article |
| id | nottingham-35528 |
| institution | University of Nottingham Malaysia Campus |
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| last_indexed | 2025-11-14T19:26:42Z |
| publishDate | 2016 |
| publisher | BMJ |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-355282020-05-04T18:08:13Z https://eprints.nottingham.ac.uk/35528/ Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India Ahankari, Anand S. Dixit, J.V. Fogarty, Andrew W. Tata, Laila J. Myles, Puja R. Objective: The study objective was to compare haemoglobin measurements between the NBM 200 (non-invasive haemoglobin sensor) and Sahli’s hemometer in adolescent girls in a rural Indian setting. Methods: Participants included girls aged between 13 to 17 years from 34 villages in Tuljapur and Lohara blocks of Osmanabad district, Maharashtra, India. Haemoglobin (Hb) measurements from the non-invasive sensor (NBM 200) were compared with measurements obtained from Sahli’s hemometer using Bland-Altman plot, Spearman correlation coefficient, sensitivity, specificity, and area under the receiver operating characteristic curve analysis (AUROC). Results: Paired measurements from both methods were obtained from 766 adolescent girls (N=766). Haemoglobin levels estimated by Sahli’s hemometer ranged from 5.0 g/dL to 14.0 g/dL (mean: 10.1 g/dL, standard deviation (SD): 1.41), whereas measurements obtained from the NBM 200 ranged from 9.5 g/dL to 15.2 g/dL (mean: 12.8 g/dL, SD: 1.42). The Bland-Altman analysis indicated a mean difference of -2.70 g/dL (95% Confidence Intervals: -2.84 to -2.55) demonstrating an overestimation of Hb measurement by the NBM 200 compared to the Sahli’s hemometer measurements. The NBM 200 showed low sensitivity (23.6%) and moderate specificity (61.8%) for the diagnosis of anaemia. The AUROC score was 0.43 indicating an underestimation of anaemia in our study population by the NBM 200. Conclusion: Haemoglobin measurements obtained from the NBM 200 were consistently higher leading to an underestimation of anaemia prevalence compared with Sahli’s hemometer estimates among adolescent girls in India. BMJ 2016-10-01 Article PeerReviewed Ahankari, Anand S., Dixit, J.V., Fogarty, Andrew W., Tata, Laila J. and Myles, Puja R. (2016) Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India. BMJ Innovations, 2 . pp. 144-148. ISSN 2055-642X Adolescent Sahli’s hemometer Anaemia Non-invasive Haemoglobin NBM 200 India http://innovations.bmj.com/content/2/4/144 doi:10.1136/bmjinnov-2016-000139 doi:10.1136/bmjinnov-2016-000139 |
| spellingShingle | Adolescent Sahli’s hemometer Anaemia Non-invasive Haemoglobin NBM 200 India Ahankari, Anand S. Dixit, J.V. Fogarty, Andrew W. Tata, Laila J. Myles, Puja R. Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title | Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title_full | Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title_fullStr | Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title_full_unstemmed | Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title_short | Comparison of the NBM 200 non-invasive haemoglobin sensor with Sahli’s hemometer among adolescent girls in rural India |
| title_sort | comparison of the nbm 200 non-invasive haemoglobin sensor with sahli’s hemometer among adolescent girls in rural india |
| topic | Adolescent Sahli’s hemometer Anaemia Non-invasive Haemoglobin NBM 200 India |
| url | https://eprints.nottingham.ac.uk/35528/ https://eprints.nottingham.ac.uk/35528/ https://eprints.nottingham.ac.uk/35528/ |