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Underweight diabetic patients more prone to tuberculosis, finds study
SINGAPORE -Researchers at Singapore-t have reported that patients with diabetes and who were also underweight had an eight-fold increase in their risk of contracting active TB, compared to obese individuals without diabetes.Therefore "'Persistent cough in underweight patients with diabetes warrants screening for active tuberculosis." is the message. The study has been published in the International Journal of Tuberculosis and Lung Disease.
Health experts have established that diabetes is a risk factor for active TB disease. Epidemiologic studies have also shown that individuals with low body mass index (BMI), especially those in the lean or underweight range, have a higher risk of active TB compared to their heavier counterparts. However, since increased BMI is a risk factor for diabetes, most patients with diabetes tend to have high BMI in Western populations. In contrast, in Asian populations, and also in Singapore, a large proportion of patients with diabetes are not overweight, but are lean or even underweight. Hence, it is of public health importance to study the joint effect of diabetes and BMI in modulating the risk of TB in Asian populations, where diabetes develops at lower BMI.
Researchers in Singapore, led by Koh Woon Puay, who is Professor at Duke-NUS Medical School and the National University of Singapore's Saw Swee Hock School of Public Health, used data from the population-based study, the Singapore Chinese Health Study, to examine the combined association of diabetes and BMI with risk of active TB disease.
Professor Koh, the Principal Investigator of the Singapore Chinese Health Study, explained, "The key finding in this study is that diabetes and low BMI are independent risk factors for active TB disease. Hence, patients with diabetes and who are also lean or underweight have a substantially increased risk from the effects of both factors."
Dr Cynthia Chee, a co-author of the study, commented, "Singapore's TB incidence rate of 35 to 40 per 100,000 population is 5-10 times that of the US, Australia and the UK. Diabetes is a major problem in Singapore, affecting one in nine persons aged 18 to 69. In order to bring down our TB rate, it is important for all physicians to have a heightened awareness of the link between diabetes and TB, so as to facilitate the early diagnosis of active TB in this important risk group."
"The National Tuberculosis Programme - also known as the Singapore Tuberculosis Elimination Programme, or STEP - welcomes the publication of this landmark study and is proud to have played a part," said Adjunct Associate Professor Jeffery Cutter, Acting Director, National Tuberculosis Programme, National Centre for Infectious Diseases.
Based on this study, Professor Anthony Harries, who is a renowned researcher in TB from the International Union Against Tuberculosis and Lung Disease, called for physicians in diabetes clinics to practice targeted screening with a focus on underweight individuals, and for the conduct of trials to study the value of targeted TB preventive therapy among underweight patients with diabetes
Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email:Â editorial@medicaldialogues.in. Contact no. 011-43720751
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751