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CORRESPONDENCE
Year : 2012  |  Volume : 136  |  Issue : 6  |  Page : 1060

Distance of residence in 1984 may be used as exposure surrogate for the Bhopal disaster


1 Adjunct Clinical Professor, Morehouse School of Medicine & Rollins School of Public Health of Emory University, Atlanta, GA, USA
2 International Faculty Advisor, UK Faculty of Public Health, Honorary Senior Lecturer, Imperial College London, United Kingdom

Date of Web Publication4-Feb-2013

Correspondence Address:
V Ramana Dhara
Adjunct Clinical Professor, Morehouse School of Medicine & Rollins School of Public Health of Emory University, Atlanta, GA
USA
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Source of Support: None, Conflict of Interest: None


PMID: 23391807

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How to cite this article:
Dhara V R, Acquilla S. Distance of residence in 1984 may be used as exposure surrogate for the Bhopal disaster. Indian J Med Res 2012;136:1060

How to cite this URL:
Dhara V R, Acquilla S. Distance of residence in 1984 may be used as exposure surrogate for the Bhopal disaster. Indian J Med Res [serial online] 2012 [cited 2019 Nov 20];136:1060. Available from: http://www.ijmr.org.in/text.asp?2012/136/6/1060/106916

Sir,

We read with interest De's conclusions [1] that the lung function impairments in the Bhopal population were associated with gas exposure, lower socio-economic status, and smoking. Prior studies have also shown that poorer people living in kuccha houses sustained greater exposure to the gas because of proximity of residence to the Union Carbide plant [2] . However, the high prevalence of tobacco smokers/ex-smokers in the exposed group is a major confounder which may also account for the study findings. An exposure-response analysis may have helped determine whether gas exposure is truly associated with pulmonary impairment but the author did not attempt such an analysis because of possible recall bias. We suggest that using distance of individual in the residence at the time of gas release in 1984 will serve as a surrogate measure of exposure. Such an approach was successfully used in the ten-year follow up community survey conducted by the International Medical Commission on Bhopal (IMCB) [3],[4] and may help determine if the association of gas exposure with respiratory impairment is truly present in this hospital-based study.

 
   References Top

1.De S. Retrospective analysis of lung function abnormalities of Bhopal gas tragedy affected population. Indian J Med Res 2012; 135 : 193-200.  Back to cited text no. 1
    
2.Acquilla SD, Cullinan P, Dhara VR. Long-term morbidity in survivors og the 1984 Bhopal Gas Leak. Natl Med J India 1996; 9 : 5-10.  Back to cited text no. 2
    
3.Cullinan P, Acquilla S, Dhara VR. Respiratory morbidity 10 years after the Union Carbide gas leak at Bhopal: a cross-sectional survey. The International Medical Commission on Bhopal. BMJ 1997; 314 : 338-42.  Back to cited text no. 3
    
4.Dhara VR, Dhara R, Acquilla SD, Cullinan P. Pesonal exposure and long-term health effects in survivors of the Union Carbide disaster at Bhopal. Env Health Persspect 2002; 110 : 487-500.  Back to cited text no. 4
    




 

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