Medicine
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This repository contains the published and unpublished research of the Faculty of Medicine by the staff members of the faculty
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Item The effect of glycaemic control on neutralizing antibody response to COVID-19 among patients with type 2 diabetes mellitus in the Kurunegala district of Sri Lanka; A prospective cohort study(Endocrine Society of Sri Lanka, 2023) Kottahachchi, D.; Badanasinghe, N.; Samarathunga, P.; Sandeepani, P.; Cooray, S.; Warnakulasuriya, T.BACKGROUND: The antibody response following COVID-19 vaccination among patients with diabetes mellitus (DM) is of particular concern given the increased risk of severe disease in this population. The correlation between glycaemic control among persons with DM and the antibody response was not published in Asian populations. Hence, this study aimed to determine whether glycaemic control has an association with the development of an adequate antibody response for SARS-CoV-2 among patients with DM following the administration of two doses of the COVID-19 vaccine. METHODS: A prospective cohort study was carried out at three vaccination centers in the Kurunegala district from November 2021 to January 2022. Seventy-one patients with type 2 diabetes were recruited for this study and followed up on vaccination with the Sinopharm COVID-19 vaccine. HbA1 c levels at the first dose and after 6-8 weeks from the second dose of vaccine were analyzed. The neutralizing antibodies (NAbs) were analyzed using C Pass™ neutralizing antibody detection ELISA Kit following 6-8 weeks of the 2nd dose. RESULTS: The median (IQR) age of the total population (63.4% females) was 53 years (44.0-58.0) and they were diagnosed with diabetes for 6 years (3-11 years). The median first and second HbAlc values were 9.3% (7.2-10.7%) and 8.2% (7.1-10.2%) respectively. From the total population, only 66.2% developed protective levels of NAbs after 6-8 weeks of the second dose of the vaccine. The second HbAlc value was significantly lower compared to the first (z=-2.63, p=0.008). There was no significant difference in terms of sex, age, duration of diabetes, pre-vaccination HbAlc level, or HbAlc level 6-8 weeks after the vaccination among those who developed protective levels of antibodies and those who did not (p>0.05). There was no difference in sero-conversion depending on the abnormal HbAlc value (.28%) (1st HbAlc p=0.957, 2nd HbAlc p=0.360). Conclusion: We did not detect an association between glycaemic control and sero-conversion. However, 1/3rd of patients with diabetes did not have a protective level of NAbs following 2 doses of Sinopharm COVID-19 vaccination. Furthermore, glycaemic control did not deteriorate with COVID-19 vaccination.Item The incidence and risk factors of postpartum diabetes in women from Bangladesh, India and Sri Lanka (South Asia) with prior gestational diabetes mellitus: Results from the LIVING study(Elsevier, 2023) Gupta, Y.; Kapoor, D.; Lakshmi, J.K.; Praveen, D.; Santos, J.A.; Billot, L.; Naheed, A.; de Silva, H.A.; Gupta, I.; Farzana, N.; John, R.; Ajanthan, S.; Bhatla, N.; Desai, A.; Pathmeswaran, A.; Prabhakaran, D.; Teede, H.; Zoungas, S.; Patel, A.; Tandon, N.; LIVING Collaborative GroupAIM: To study, the incidence and risk factors for postpartum diabetes (DM), in women with gestational diabetes mellitus (GDM) from South Asia (Bangladesh, India and Sri Lanka), followed for nearly two years after delivery. METHODS: Women with prior GDM diagnosed using IADPSG criteria were invited at 19 centres across Bangladesh, India and Sri Lanka for an oral glucose tolerance test (OGTT) following childbirth, and were enrolled in a randomized controlled trial. The glycaemic category (outcome) was defined from an OGTT based on American Diabetes Association criteria. RESULTS: Participants (n = 1808) recruited had a mean ± SD age of 31.0 ± 5.0 years. Incident DM was identified, between childbirth and the last follow-up, in 310 (17.1 %) women [incidence 10.75/100 person years], with a median follow-up duration of 1.82 years after childbirth. Higher age, lower education status, higher prior pregnancy count, prior history of GDM, family history of DM, and postpartum overweight/obese status were significantly associated with incident DM. Women in Bangladesh had a higher cumulative incidence of DM [16.49/100 person years] than in Sri Lanka [12.74/100 person years] and India [7.21/100 person years]. CONCLUSIONS: A high incidence of DM was found in women with prior GDM in South Asia, with significant variation between countries. Women from Bangladesh had a significantly higher pregnancy count, family history of DM and overweight/obese status, despite having significantly lower age, which could be responsible for their higher rates of DM. Registration of this study: The study was registered with the Clinical Trials Registry of India (CTRI/2017/06/008744), Sri Lanka Clinical Trials Registry (SLCTR/2017/001), and ClinicalTrials.gov (NCT03305939).Item Nonalcoholic fatty liver disease in diabetics: The role of hepatologist(Jaypee Prothers Medical Publishers, 2022) Khandelwal, R.; Dassanayake, A.S.; Singh, S.P.Diabetes mellitus is one of the most prevalent metabolic diseases worldwide, causing an enormous burden on the economies of both developed and developing nations. Nonalcoholic fatty liver disease (NAFLD) is very closely associated with diabetes, and the two diseases are known to cause an increase in morbidity and mortality. Timely referral of a diabetic with NAFLD to a hepatologist can definitely delay disease progression and the related complications. Despite the magnitude, there are no guidelines that recommend a screening algorithm that must be followed for evaluating NAFLD in at-risk diabetics at the primary care level and their further referral to hepatologists. Nonalcoholic fatty liver disease management needs heightened awareness among primary care physicians/endocrinologists and hepatologists, and a collaborative care approach is paramount in these patients. Certain antidiabetic drugs are found to be beneficial in the treatment of NAFLD patients with diabetes, however, none of them are FDA approved.Item Food environment and diabetes mellitus in South Asia: A geospatial analysis of health outcome data(Public Library of Science,San Francisco, 2022) Kusuma, D.; Atanasova, P.; Pineda, E.; Anjana, R.M.; de Silva, L.; Hanif, A.A.; Hasan, M.; Hossain, M.M.; Indrawansa, S.; Jayamanne, D.; Jha, S.; Kasturiratne, A.; Katulanda, P.; Khawaja, K.I.; Kumarendran, B.; Mridha, M.K.; Rajakaruna, V.; Chambers, J.C.; Frost, G.; Sassi, F.; Miraldo, M.Background: The global epidemic of type 2 diabetes mellitus (T2DM) renders its prevention a major public health priority. A key risk factor of diabetes is obesity and poor diets. Food environments have been found to influence people's diets and obesity, positing they may play a role in the prevalence of diabetes. Yet, there is scant evidence on the role they may play in the context of low- and middle-income countries (LMICs). We examined the associations of food environments on T2DM among adults and its heterogeneity by income and sex. Methods and findings: We linked individual health outcome data of 12,167 individuals from a network of health surveillance sites (the South Asia Biobank) to the density and proximity of food outlets geolocated around their homes from environment mapping survey data collected between 2018 and 2020 in Bangladesh and Sri Lanka. Density was defined as share of food outlets within 300 m from study participant's home, and proximity was defined as having at least 1 outlet within 100 m from home. The outcome variables include fasting blood glucose level, high blood glucose, and self-reported diagnosed diabetes. Control variables included demographics, socioeconomic status (SES), health status, healthcare utilization, and physical activities. Data were analyzed in ArcMap 10.3 and STATA 15.1. A higher share of fast-food restaurants (FFR) was associated with a 9.21 mg/dl blood glucose increase (95% CI: 0.17, 18.24; p < 0.05). Having at least 1 FFR in the proximity was associated with 2.14 mg/dl blood glucose increase (CI: 0.55, 3.72; p < 0.01). A 1% increase in the share of FFR near an individual's home was associated with 8% increase in the probability of being clinically diagnosed as a diabetic (average marginal effects (AMEs): 0.08; CI: 0.02, 0.14; p < 0.05). Having at least 1 FFR near home was associated with 16% (odds ratio [OR]: 1.16; CI: 1.01, 1.33; p < 0.05) and 19% (OR: 1.19; CI: 1.03, 1.38; p < 0.05) increases in the odds of higher blood glucose levels and diagnosed diabetes, respectively. The positive association between FFR density and blood glucose level was stronger among women than men, but the association between FFR proximity and blood glucose level was stronger among men as well as among those with higher incomes. One of the study's key limitations is that we measured exposure to food environments around residency geolocation; however, participants may source their meals elsewhere. Conclusions: Our results suggest that the exposure to fast-food outlets may have a detrimental impact on the risk of T2DM, especially among females and higher-income earners. Policies should target changes in the food environments to promote better diets and prevent T2DM.Item Identification of genetic effects underlying type 2 diabetes in South Asian and European populations(Nature Publishing Group UK, 2022) Loh, M.; Zhang, W.; Ng, H.K.; Schmid, K.; Lamri, A.; Tong, L.; Ahmad, M.; Lee, J.J.; Ng, M.C.Y.; Petty, L.E.; Spracklen, C.N.; Takeuchi, F.; Islam, M.T.; Jasmine, F.; Kasturiratne, A.; Kibriya, M.; Mohlke, K.L.; Paré, G.; Prasad, G.; Shahriar, M.; Chee, M.L.; de Silva, H.J.; Engert, J.C.; Gerstein, H.C.; Mani, K.R.; Sabanayagam, C.; Vujkovic, M.; Wickremasinghe, A.R.; Wong, T.Y.; Yajnik, C.S.; Yusuf, S.; Ahsan, H.; Bharadwaj, D.; Anand, S.S.; Below, J.E.; Boehnke, M.; Bowden, D.W.; Chandak, G.R.; Cheng, C.Y.; Kato, N.; Mahajan, A.; Sim, X.; McCarthy, M.I.; Morris, A.P.; Kooner, J.S.; Saleheen, D.; Chambers, J.C.South Asians are at high risk of developing type 2 diabetes (T2D). We carried out a genome-wide association meta-analysis with South Asian T2D cases (n = 16,677) and controls (n = 33,856), followed by combined analyses with Europeans (neff = 231,420). We identify 21 novel genetic loci for significant association with T2D (P = 4.7 × 10-8 to 5.2 × 10-12), to the best of our knowledge at the point of analysis. The loci are enriched for regulatory features, including DNA methylation and gene expression in relevant tissues, and highlight CHMP4B, PDHB, LRIG1 and other genes linked to adiposity and glucose metabolism. A polygenic risk score based on South Asian-derived summary statistics shows ~4-fold higher risk for T2D between the top and bottom quartile. Our results provide further insights into the genetic mechanisms underlying T2D, and highlight the opportunities for discovery from joint analysis of data from across ancestral populations.Item Standards of care of management of diabetes among rural cohort in Sri Lanka - a descriptive study(Sri Lanka College of Internal Medicine, 2021) Chathuranga, P.A.D.U.; Meegodawidanage, N.; Rathnayaka, T.M.; Luke, W.A.N.V.; Mettananda, K.C.D.Introduction: Type 2 Diabetes mellitus (T2DM) is a challenge to health care leading to increase in morbidity and mortality. Objective: We conducted a descriptive study in rural Sri Lanka to assess the standards of care and disease control among patients with diabetes to identify areas for improvement. Methods: A retrospective follow-up study was conducted in five hospitals in Anuradhapura district. All type 2 diabetic patients, diagnosed and started on oral hypoglycemic drugs 24 months prior to recruitment, who attended the above clinics during the study period were enrolled to the study. Data on demographics, medications and blood sugar control were collected using an interviewer-administered questionnaire and perusing medical records. Drug compliance was studied using a self-administered questionnaire. Results: Control of Diabetes and other cardiovascular risk factors 2 years following initiation of oral hypoglycaemic drugs in 421 patients (19.2% male, mean age 58.3±10.4 years) were studied. Even after 2 years of medications, 48.2% were overweight, 34.0% obese and 53.9% were physically inactive. Prevalence of medication use among them were, metformin 96.7%, statins 64.1 % and anti-hypertensives 49.4%. Their mean Fasting Blood Sugar(FBS) was 139±54.3 mg/dl and Body Mass Index(BMI) was 26.5±4.5kgm-2. Poor compliance to medication was found in 60.3%. Sub-optimal risk factor control, FBS >130mg/dl, blood pressure >130/80mmHg, and LDL >100mg/dl were seen in 45.1.%, 19.94% and 16.1%, respectively. Conclusion: Even though majority were started on necessary medicines, FBS control was poor in this rural population. The reasons behind poor FBS control need to be studied and addressed to improve care of patients with diabetes in rural Sri Lanka.Item The iHealth-T2D study, prevention of type 2 diabetes amongst South Asians with central obesity and prediabetes: study protocol for a randomised controlled trial(BioMed Central, London, 2021) Kasturiratne, A.; Khawaja, K.I.; Ahmad, S.; Siddiqui, S.; Shahzad, K.; Athauda, L.K.; Jayawardena, R.; Mahmood, S.; Muilwijk, M.; Batool, T.; Burney, S.; Glover, M.; Palaniswamy, S.; Bamunuarachchi, V.; Panda, M.; Madawanarachchi, S.; Rai, B.; Sattar, I.; Silva, W.; Waghdhare, S.; Jarvelin, M.R.; Rannan-Eliya, R.P.; Gage, H.M.; van Valkengoed, I.G.M.; Valabhji, J.; Frost, G.S.; Loh, M.; Wickremasinghe, A.R.; Kooner, J.S.; Katulanda, P.; Jha, S.; Chambers, J.C.Background: People from South Asia are at increased risk of type 2 diabetes (T2D). There is an urgent need to develop approaches for the prevention of T2D in South Asians that are cost-effective, generalisable and scalable across settings.Hypothesis: Compared to usual care, the risk of T2D can be reduced amongst South Asians with central obesity or raised HbA1c, through a 12-month lifestyle modification programme delivered by community health workers.Design: Cluster randomised clinical trial (1:1 allocation to intervention or usual care), carried out in India, Pakistan, Sri Lanka and the UK, with 30 sites per country (120 sites total). Target recruitment 3600 (30 participants per site) with annual follow-up for 3 years.Entry criteria: South Asian, men or women, age 40-70 years with (i) central obesity (waist circumference ≥ 100 cm in India and Pakistan; ≥90 cm in Sri Lanka) and/or (ii) prediabetes (HbA1c 6.0-6.4% inclusive).Exclusion criteria: known type 1 or 2 diabetes, normal or underweight (body mass index < 22 kg/m2); pregnant or planning pregnancy; unstable residence or planning to leave the area; and serious illness.Endpoints: The primary endpoint is new-onset T2D at 3 years, defined as (i) HbA1c ≥ 6.5% or (ii) physician diagnosis and on treatment for T2D. Secondary endpoints at 1 and 3 years are the following: (i) physical measures: waist circumference, weight and blood pressure; (ii) lifestyle measures: smoking status, alcohol intake, physical activity and dietary intake; (iii) biochemical measures: fasting glucose, insulin and lipids (total and HDL cholesterol, triglycerides); and (iv) treatment compliance. Intervention: Lifestyle intervention (60 sites) or usual care (60 sites). Lifestyle intervention was delivered by a trained community health worker over 12 months (5 one-one sessions, 4 group sessions, 13 telephone sessions) with the goal of the participants achieving a 7% reduction in body mass index and a 10-cm reduction in waist circumference through (i) improved diet and (ii) increased physical activity. Usual care comprised a single 30-min session of lifestyle modification advice from the community health worker. Results: We screened 33,212 people for inclusion into the study. We identified 10,930 people who met study entry criteria, amongst whom 3682 agreed to take part in the intervention. Study participants are 49.2% female and aged 52.8 (SD 8.2) years. Clinical characteristics are well balanced between intervention and usual care sites. More than 90% of follow-up visits are scheduled to be complete in December 2020. Based on the follow-up to end 2019, the observed incidence of T2D in the study population is in line with expectations (6.1% per annum). Conclusion: The iHealth-T2D study will advance understanding of strategies for the prevention of diabetes amongst South Asians, use approaches for screening and intervention that are adapted for low-resource settings. Our study will thus inform the implementation of strategies for improving the health and well-being of this major global ethnic group.Item Regional Variation in Comorbid Prediabetes and Diabetes and Associated Factors among Hypertensive Individuals in Rural Bangladesh, Pakistan, and Sri Lanka(Hindawi Publishing Corporation, 2019) Feng, L.; Naheed, A.; de Silva, H.A.; Jehan, I.; Raqib, R.; Islam, M.T.; Luke, N.; Kasturiratne, A.; Farazdaq, H.; Senan, S.; Jafar, T.H.; Cobra-Bps Study GroupWe aimed to explore the cross-country variation in the prevalence of comorbid prediabetes or diabetes and determine the sociodemographic, lifestyle, and clinical factors, especially body mass index (BMI) and waist circumference, associated with comorbid diabetes in individuals with hypertension in rural South Asia. We analyzed cross-sectional data of 2426 hypertensive individuals of ≥40 years from 30 randomly selected rural communities in Bangladesh, Pakistan, and Sri Lanka. Prediabetes was defined as fasting plasma glucose (FPG) between 100 and 125 mg/dL without use of antidiabetic treatment and diabetes as FPG ≥126 mg/dL or use of antidiabetic medication. The prevalence (95% CI) of prediabetes or diabetes (53.5% (51.5%, 55.5%)) and diabetes (27.7% (25.9%, 29.5%)) was high in the overall hypertensive study population in rural communities in 3 countries. Rural communities in Sri Lanka had the highest crude prevalence of prediabetes or diabetes and diabetes (73.1% and 39.3%) with hypertension, followed by those in Bangladesh (47.4% and 23.1%) and Pakistan (39.2% and 20.5%). The factors independently associated with comorbid diabetes and hypertension were residing in rural communities in Sri Lanka, higher education, international wealth index, waist circumference, pulse pressure, triglyceride, and lower high-density lipoprotein. The association of diabetes with waist circumference was stronger than with BMI in hypertensive individuals. Prediabetes or diabetes are alarmingly common among adults with hypertension and vary among countries in rural South Asia. The high prevalence of comorbid diabetes in Sri Lanka among hypertensives is not fully explained by conventional risk factors and needs further etiological research. Urgent public health efforts are needed to integrate diabetes control within hypertension management programs in rural South Asia, including screening waist circumference.Item The Recto-Anal Inhibitory Reflex (RAIR): abnormal response in diabetics suggests an intrinsic neuro-enteropathy(BMJ Publishing, 1997) Deen, K.I.; Premaratna, R.; Fonseka, M.M.D.; de Silva, H.J.INTRODUCTION: The recto-anal inhibitory reflex (RAIR) is characterized by reflex relaxation of the anal canal in response to electrical stimulation of the rectal mucosa, and is mediated by nitrergic neural plexuses within the gut wall. Impairment of this reflex may lead to incontinence. AIM: To measure anal canal pressures, anal mucosal electrosensation and RAIR in diabetic patients and correlate these measurements with incontinence for gas or faeces. METHODS: Anal canal pressure, RAIR and continence was evaluated in 30 diabetic patients [Male:Female=13:17, median age 57 years (range 37- 70)], and these data were compared with similar data obatained from 22 age and sex matched 'healthy' controls [Male:Female= 9:13, median age 51 years (range 19 - 65 )]. Median duration of diabetes was 8 years (range 3 -30 ). 12 (40%) of the 30 diabetics had impaired continence for gas (n=12) and liquid faeces (n=3). None ofthe controls had incontinence. RESULTS: Maximum resting anal canal pressure (MRP) was [median (range)]: Patients 30mmHg (20-75) vs. Controls 40mmHg (20-105), P=0.61. Maximum squeeze pressure (MSP) [median (range)]: Patients 65mmHg (30- 150) vs. Controls 84mmHg (35-230), P=0.59. Threshold rectal mucosal eletrosensation (RMES-T) [median (range)]: Patients 27 mA (5-40) vs. Controls l3mA (5-28), P=0.03. Maximum tolerable rectal mucosal electrosensation [median (range)]: Patients 40 mA (20-60) vs. Controls 20 mA (10-30), P=0.042 (all comparisons using Wilcoxon rank test). RAIR was present in 8, abnormal in 5 (1 with incontinence), and absent in 17 (II with incontinence) diabetics while it was present in 18 and abnormal in 4 controls (test of proportion, P=0.03 I). CONCLUSIONS: RAIR was impaired in significantly more patients with diabetes than controls implying impairment of intrinsic neuronal function. All diabetic patients with incontinence had impaired or absent RAIR. Impairment of this reflex may be a useful predictor of incontinence in diabetics.Item Dietaryadviceongdmmothers-an audit(Sri Lanka College of Obstetricians and Gynaecologists, 2006) Jayasundar, C.; Ellepola, U.K.; Herath, H.M.R.P.; Perera, A.; Wijesundere, A.BACKGROUND: Gestational Diabetes Mellitus (GDM) is considered a global problem and in Sri Lanka. It is emerging as a common complication in pregnancy. Hence, an audit was undertaken to evaluate dietary advice given to GDM mothers as it is the primary modality of treatment. OBJECTIVE: To ascertain the standard of dietary advice given to GDM mothers attending a tertiary care ,. ater.STUDY TYPE: Retrospective study. STUDY SETTING: Tertiary care center. STUDY SAMPLE: 49 consecutive GDM mothers, who was diagnosed in the ANC and ward. METHOD: Study was carried out from 1st of June to 1st of August 2006. A questionnaire was developed to evaluate the standard of the dietary advice in accordance with the unit policy. RESULTS: Out of the population 39% were in the age group of 21-30 and 61% in the 31-40 age category. Out of the total sample 96% of mothers received advice on a diabetic diet but out of which, only 4% had been supplemented with written format. The SHO, registrar, and senior registrar contributed dietary advice to 37% of the mothers while nursing officers have advised to 22%. The intern medical officers have advised 19% of mothers, while public health rnidwives, MOH have accounted for advising 15% and 5% respectively. The dietician advised only 2% of the mothers. Out of the mothers who were interviewed following the dietary advice, 69% understood the advice satisfactorily. Furthermore 24% stated that they understood the advice partially and 7 % reported poor understanding. In addition 16% of the mothers had requested repeated dietary advice. Finally, 56% reported satisfaction with the overall dietary management of the above medical complication. CONCLUSIONS AND RECOMMENDATIONS: The dietary advice given in our study population is unsatisfactory, considering the fact that the diet control is the primary modality of treatment in GDM. We recommend that advising on diet is a joint responsibility of medical officers, nursing officers, midwives and dieticians. Such advice should be solid and tailored to follow the Sri Lankan dietary habits and expectations. In addition the explanations should be done in a simple manner with use of a dietary advice leaflet according to a common protocol and each hospital should have a specialized supplemented with written format. The SHO, registrar, and senior registrar contributed dietary advice to 37% of the mothers while nursing officers have advised to 22%. The intern medical officers have advised 19% of mothers, while public health rnidwives, MOH have accounted for advising 15% and 5% respectively. The dietician advised only 2% of the mothers. Out of the mothers who were interviewed following the dietary advice, 69% understood the advice satisfactorily. Furthermore 24% stated that they understood the advice partially and 7 % reported poor understanding. In addition 16% of the mothers had requested repeated dietary advice. Finally, 56% reported satisfaction with the overall dietary management of the above medical complication. CONCLUSIONS AND RECOMMENDATIONS: The dietary advice given in our study population is unsatisfactory, considering the fact that the diet control is the primary modality of treatment in GDM. We recommend that advising on diet is a joint responsibility of medical officers, nursing officers, midwives and dieticians. Such advice should be solid and tailored to follow the Sri Lankan dietary habits and expectations. In addition the explanations should be done in a simple manner with use of a dietary advice leaflet according to a common protocol and each hospital should have a specialized dietician.