Conference Papers
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This collection contains abstracts of conference papers, presented at local and international conferences by the staff of the Faculty of Medicine
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Item Assessing motivation to lose weight: the psychometric properties of the Sinhala version of University of Rhode Island Change Assessment (URICA) scale(Sri Lanka Medical Association, 2023) Niriella, M.A.; de Silva, S.T.; Hapangama, A.; Baminiwatta, A.; Fernando, R.; Ediriweera, D.INTRODUCTION: Weight reduction through lifestyle modifications is an important component in the management of various chronic diseases. The degree of motivation to change has been shown to predict outcomes in weight reduction interventions. Thus, the availability of a validated self-report tool assessing the degree of motivation for weight management would be useful for both clinical and research purposes in Sri Lanka. OBJECTIVES: To examine the structural validity and internal consistency of the URICA for weight management in a sample of Sri Lankan adults with chronic medical conditions. METHODS: Standard procedures for cross-cultural adaptation of a questionnaire were followed in translating the 32-item URICA into Sinhala. The Sinhala version was administered to 208 patients aged 18-60 years attending outpatient clinical services for non-disabling chronic medical diseases. Psychometric testing included confirmatory factor analysis and the assessment of internal consistency (Cronbach α). RESULTS: The commonly accepted four-factor structure of URICA reflecting Prochaska and Di Clemente’s transtheoretical model (pre-contemplation, contemplation, action and maintenance) showed good model fit, after the removal of four items from the pre-contemplation subscale due to inadequate factor loadings (<0.4). In line with theory, factor correlations indicated that the pre-contemplation factor was inversely correlated with the other three factors, while the other three factors were positively correlated with one another. All four subscales showed good internal consistency (Cronbach α ranging from 0.73 to 0.89). CONCLUSIONS: The Sinhala version of a modified 28-item URICA was found to have sound psychometric properties as a measure of motivation for weight management among Sinhala-speaking adult patient.Item Should ‘Drug Related Problems’ remain unnoticed among patients with chronic kidney disease of uncertain aetiology?(Sri Lanka Medical Association, 2023) Wickramasinghe, N.D.D.; Lynch, C.B.; Coombes, J.; Jayamanne, S.F.; de Silva, S.T.INTRODUCTION: Chronic kidney disease of uncertain aetiology (CKDu) is a major public health concern in Sri Lanka. CKDu patients often consume 10-12 drugs per day, which can result in drug-related problems (DRPs). However, emerging economies such as Sri Lanka have few safeguards in place to detect and report DRPs. OBJECTIVES: The objective of this study was to introduce clinic-based pharmacy services to detect, address and report DRPs that occurred in CKDu out-patients. METHODS: A randomized controlled clinical trial was conducted in pre-dialysis CKDu stages 4 and 5 patients at outpatient renal clinics in Teaching Hospital, Anuradhapura, Sri Lanka. DRPs were identified in both groups at baseline. The control group received usual clinic care while the intervention group received medication counseling by a clinic-based pharmacist. DRPs were identified in both groups after 12 months. RESULTS: At baseline, there were 123 and 126 patients in the control and intervention groups, respectively. 133 and 147 DRPs were identified from 80 and 79 patients in the control and intervention groups, respectively. The median number of DRPs per patient was 1 (1-2) (p=0.458) for both groups. After 12 months, there were 101 and 98 patients in the control and intervention groups, respectively. 137 and 59 DRPs were identified from 57 and 33 patients in the control and intervention groups, respectively. The median number of DRPs per patient was 2 (1-3) and 1 (1-2) (p=0.029) in control and intervention groups, respectively. CONCLUSION: A “clinic-based pharmacist” counselling is a beneficial additional service for identifying and addressing DRPs occurring in patients with CKDu.Item Is splenic stiffness measurement(SSM) better than Baveno VII criteria to predict oesophageal and cardio- fundal varices in patients with compensated advanced liver cell disease (cACLD)?(Sri Lanka Medical Association, 2023) de Silva, A.P.; Niriella, M.A.; Nishad, A.A.N.; Samarawickrama, V.T.; Jayasundara, H.; Ranawaka, C.K.; de Silva, S.T.; Withanage, M.; Ediriweera, D.; de Silva, H.J.INTRODUCTION: Liver and splenic stiffness measurements (LSM and SSM) using transient elastography (TE) are being increasingly used as a screening tool to predict varices. OBJECTIVES: We aimed to test the utility of Baveno-VII criteria (LSM>25kPa, LSM>20kPa with platelet count <130,000 and LSM>15kPa with platelet count <110,000) and SSM to predict oesophageal and cardio-fundal varices in a cohort of Sri Lankan patients with aALCD. METHODS: Consecutive patients with newly diagnosed Child’s class A cALCD (non-viral, BMI<30) were recruited prospectively. They underwent upper gastrointestinal endoscopy by an endoscopist followed by a Fibroscan by an operator who is unaware of endoscopy findings using ECHOSENS-Fibroscan-502 to measure LSM and SSM. Validity measurements of three Baveno-VII criteria and SSM values to predict oesophageal and cardio-fundal varices were calculated. RESULTS: One hundred and seventy-four individuals were recruited [Mean (95%CI) age 61.4 (59.7-62.8) years, 110 males], and 106 had varices. Our results indicate that the three Baveno VII criteria had sensitivities of 61%, 63% and 42%, and specificities of 79%, 77% and 87%. SSM>30kPa alone or in combination with LSM>15kPa had sensitivity of 81&75%, specificity of 72&83%, PPV of 82&87%, NPV of 71&67% and accuracy of 78&78% consecutively to predict oesophageal and cardio-fundal varices. CONCLUSION: Baveno VII criteria had low sensitivity but high specificity to predict oesophageal and cardio-fundal varices. SSM>30kPa alone or in combination with LSM>15kPa seemed to predict oesophageal and cardio-fundal varices better.Item Prevalence, predictors and outcome of chronic kidney disease in a cohort of aging urban, adult Sri Lankans(Sri Lanka Medical Association, 2021) de Silva, S.T.; Ediriweera, D.D.; Niriella, M.A.; Kasturiratne, A.; Kato, N.; Wickremasinghe, A.R.; de Silva, H.J.Introduction and Objectives Chronic kidney disease (CKD) affects 700 million people worldwide. In 2017, deaths due to CKD accounted for 4.6% of mortality globally. Prevalence of CKD is increasing worldwide, with increasing diabetes and hypertension in aging populations. Our objective was to determine prevalence of CKD in an urban, adult cohort, since such data is scarce in Sri Lanka. Methods The study population was selected by stratified random sampling from Ragama MOH area initially in 2007 (aged 35-64 years) and re-assessed in 2014. On both occasions, participants were assessed by structured interview, anthropometric measurements and biochemical tests. CKD was assessed in 2014. Estimated glomerular filtration rate (eGFR) was calculated using CKD-EPI formula. CKD was defined as eGFR<60ml/min/1.72m2, using KDIGO/KDOQI classification. The cohort was further followed up in 2017 when all-cause and cardiovascular (CV) mortality and CV morbidity were also assessed. Results Of 2985 individuals recruited in 2007, 2148(71.6%) attended follow-up in 2014. 2032/2148 (94.6%) had CKD data [57.0% women, mean age 52.3(SD 7.7) years]. Age adjusted prevalence of CKD was 3.03(1.98–4.11) per 100 population in 2014; 41/61(67.2%) were in CKD Stage-3A, 14/61(23%) in Stage-3B, 6/61(9.8%) in Stage-4 and none in end-stage. Independent predictors of CKD in 2014 were older age (p<0.001), male gender (P<0.05) and presence of diabetes (p<0.001) and hypertension (p<0,001) in 2007. CKD was not associated with all-cause mortality, CV mortality or morbidity (p>0.05) in 2017.Conclusion Diabetes and hypertension were associated with CKD. Most with CKD were in Stage 3, where early recognition and better control of co-morbidities retard progression of CKD.Item Epidemiology of chronic kidney disease in two tertiary referral centres in Sri Lanka(Journal of the Ceylon College of Physicians, 2019) Herath, H.M.N.J.; Perera, H.S.S; Karunathilaka, M.A.I.B.B.; Perera, U.M.S.; Bandara, D.M.P.; Samarasinghe, S.M.S.N.; de Silva, S.T.INTRODUCTION AND OBJECTIVES: Chronic kidney disease (CKD) has become a major public health problem in Sri Lanka. The worldwide leading underlying causes for CKD are diabetes, hypertension and glomerulonephritis. There is regional variation in CKD prevalence in Sri Lanka due to the presence of a CKD of uncertain aetiology (CKDu). The objectives of our study were to identify aetiology, clinical stage and associated co-morbid diseases in patients with CKD referred to the Nephrology Service. METHODOLOGY: This cross-sectional descriptive study was carried out over one-year at Colombo North Teaching Hospital (CNTH), Ragama and District General Hospital, Negombo, from May 2018. All data was obtained from CNTH Renal Registry. RESULTS: Data of 1147 patients were studied. Mean age was 61.8 (SD 13.6) years, 683 (59.8%) were male and the majority [969 (84.5%)] were from Gampaha District. The primary renal disease was diabetes in 645 (56.2%), hypertension in 251 (22%) and glomerulonephritis in 40 (3.5%). There were only 16 (1.4%) patients with CKD-u and none were from Gampaha district. 539 (47%) were in CKD stage III, 329 (28.7%) in stage IV and 147 (12.8%) in stage V; there was no significant difference in the mean age of patients in each CKD stage. The commonest co-morbidity was hypertension, present in 180 (15.7%) patients. CONCLUSION: The commonest causes of CKD in Gampaha district were diabetes and hypertension, with no cases of CKDu. Screening patients with diabetes and hypertension for CKD is mandatory. More research is needed in to CKD due to identifiable causes in the non-CKDu regions of the country, since this appears to be an emerging and under-appreciated problem.Item Validation of the World Health Organization/ International Society of Hypertension (WHO/ISH) cardiovascular risk predictions in Sri Lankans based on findings from a prospective cohort study(Ceylon College of Physicians, 2020) Thulani, U.B.; Mettananda, K.C.D.; Warnakulasuriya, D.T.D.; Peiris, T.S.G.; Kasturiratne, K.T.A.A.; Ranawaka, U.K.; Chackrewarthy, S.; Dassanayake, A.S.; Kurukulasooriya, S.A.F.; Niriella, M.A.; de Silva, S.T.; Pathmeswaran, A.P.; Kato, N.; de Silva, H.J.; Wickremasinghe, A.R.INTRODUCTION AND OBJECTIVES: There are no cardiovascular(CV)-risk prediction models specifically for Sri Lankans. Different risk prediction models not validated among Sri Lankans are being used to predict CV-risk of Sri Lankans. We validated the WHO/ISH (SEAR-B) risk prediction charts prospectively in a population-based cohort of Sri Lankans. METHOD: We selected participants between 40-64 years, by stratified random sampling of the Ragama Medical Officer of Health area in 2007 and followed them up for 10-years. Risk predictions for 10-years were calculated using WHO/ISH (SEAR-B) charts with- and without-cholesterol in 2007. We identified all new-onset cardiovascular events(CVE) from 2007-2017 by interviewing participants and perusing medical-records/death-certificates in 2017. We validated the risk predictions against observed CVEs. RESULTS: Baseline cohort consisted of 2517 participants (males 1132 (45%), mean age 53.7 (SD: 6.7 years). We observed 215 (8.6%) CVEs over 10-years. WHO/ISH (SEAR B) charts with and without-cholesterol predicted 9.3% (235/2517) and 4.2% (106/2517) to be of high CV-risk ≥20%), respectively. Risk predictions of both WHO/ISH (SEAR B) charts with- and without-cholesterol were in agreement in 2033/2517 (80.3%). Risk predictions of WHO/ISH (SEAR B) charts with and with out-cholesterol were in agreement with observed CVE percentages among all except in high risk females predicted by WHO/ISH (SEAR B) chart with-cholesterol (observed risk 15.3% (95% Cl 12.5 - 18.2%) and predicted risk 2::20%). CONCLUSIONS: WHO/ISH (SEAR B) risk charts provide good 10-year CV-risk predictions for Sri Lankans. The predictions of the two charts, with and without-cholesterol, appear to be in agreement but the chart with-cholesterol seems to be more predictive than the chart without-cholesterol. Risk charts are more predictive in males than in females. The predictive accuracy was best when stratified into two categories; low (<20%) and high (≥20%) risk.Item Prevalence, associations and treatment outcome of anaemia in a cohort of patients with Chronic Kidney Disease(Sri Lanka Medical Association, 2019) Luke, W.A.N.V.; Lakmini, K.M.S.; Nadeeka, D.; de Silva, S.T.INTRODUCTION & OBJECTIVES: Anaemia is a common complication of chronic kidney disease (CKD) that can adversely affect cardiovascular health and quality of life. We conducted a study to assess prevalence, associations and treatment response of anaemia in a cohort of patients with CKD. METHODS: A descriptive cross sectional study was conducted among consecutive, consenting adult patients with stable CKD attending clinics and wards of University Medical Unit, Colombo North Teaching Hospital, Ragama. RESULTS: Of 149 patients with CKD [86/149 males (57.7%)], 105 (70.5%) had diabetes, 125 (83.9%) had hypertension and 57 (37.6%) had ischemic heart disease. 58/63 (90.6%) females and 80/86 (93%) males had anaemia. Severity of anaemia was associated with female sex (p=0.02), advancing CKD stage (p<0.01), diabetes (p=0.03), chronic liver cell disease (p=0.03), being on dialysis (p<0.005) and increasing degree of proteinuria (p<0.001). Of 91 patients investigated for the cause of anaemia, 55/91 (60.4%) had iron deficiency with anaemia of chronic disease while 25/91 (27.5%) had anaemia of chronic disease only. Of 88 patients with haemoglobin <10g/dL, only 40 (45.4%) were on erythropoietin and 50 (56.8%) had received blood transfusions. 76.1% (67/88) of the anaemic patients continued to have hemoglobin below 10g/dL at follow up despite treatment. CONCLUSION: Anaemia was highly prevalent in the CKD cohort we studied, compared to similar populations in other countries. Timely evaluation of anaemia, treatment of coexistent nutritional deficiencies and initiation of erythropoietin therapy are important to prevent anaemia-related complications and minimize the need for transfusions.Item Marriage patterns in Sri Lanka and the role of consanguinity in thalassaemia: A cross sectional descriptive analysis(Sri Lanka Medical Association, 2019) Goonatilleke, M.D.D.C.; de Silva, S.T.; Rodrigo, R.; Perera, S.; Goonathilaka, G.W.M.R.G.B.; Ramees, L.; Mettananda, S.; Weatherall, D.L.; Premawardhena, A.P.INTRODUCTION & OBJECTIVES: Consanguineous marriages play an important role in the propagation of thalassaemia. There is a paucity of data on consanguineous marriages in modern Sri Lankan society and its effect on thalassaemia births. We studied sociological aspects of Sri Lankan marriages with emphasis on consanguinity, and the prevalence of consanguinity in the parents of patients with thalassaemia. METHODS: Three marriage registrars from each district were asked to record details about the partners of all marriages they registered for 6 months, from July 2009. Parents of patients with thalassemia were interviewed separately, to identify any consanguinity. RESULTS: A total of 5249 marriages were recorded from 22 districts. Average age at marriage was 27.2 9 years for males and 24.0 8 years for females. 3737/5249 (71.2%) of all marriages were Love Marriages, except in the Moor community where 89.2% were Arranged Marriages. Female literacy and education tier levels were higher than in males. Overall national consanguinity rate was 6.4% (337/5249). It was highest among Tamils (20.4%), but only 3.3% among Sinhalese and 3.1% among Moors. In the parents of 405 patients with thalassaemia, overall consanguinity rate was 11.1% (45/405): it was highest among Tamils (33.3%) and lowest among Sinhalese (9.4%). CONCLUSION: Consanguinity among patients with Thalassaemia was almost double the national average. Though not the dominant cause, more emphasis should be given to consanguinity when conducting thalassaemia prevention campaigns. Since they are older and better educated at marriage, female partners should be better targeted in such health education campaigns.Item Predictors of mortality in a cohort of adult Sri Lankans(Sri Lanka Medical Association., 2019) Kasturiratne, A.; Beddage, T.; de Silva, S.T.; Niriella, M.A.; Pathmeswaran, A.; Kato, N.; Wickremasinghe, A.R.; de Silva, H.J.INTRODUCTION & OBJECTIVES: There is limited knowledge on early predictors of mortality among Sri Lankans. We investigated predictors of mortality in the Ragama Health Study cohort 10 years after recruitment. METHODS: The study population (35-64-year-olds selected by age-stratified random sampling from the Ragama Medical Officer of Health area) was initially screened in 2007 for socio-demographic, lifestyle, anthropometric and clinical risk factors with informed written consent. Their vital status was assessed in 2017 and the causes of death of the deceased were retrieved from death certificates available with the next-of-kin or declaration of death records from the hospital where the death occurred. RESULTS: Of the 2986 enrolled in 2007, 169 [Males: 107 (63.3%)] had died over the 10-year period, giving an overall mortality rate of 5.7% (95% CI: 5.0 % - 6.4%). The number of deaths due to cardiovascular and cancer related causes were 73/169 and 31/169, respectively. On multivariate analysis using Cox's proportional hazards model, advancing age, male sex, lower educational level, unsafe alcohol consumption and the presence of metabolic syndrome at baseline were independent predictors of all-cause mortality. Advancing age, male sex, unsafe alcohol consumption and the presence of metabolic syndrome at baseline were independent predictors of cardiovascular mortality, while advancing age and unsafe alcohol consumption were the only independent predictors of cancer-related mortality. CONCLUSION: Unsafe alcohol consumption and the presence of metabolic syndrome were important modifiable risks for mortality in this population. Addressing these risks in early adulthood will help to improve longevity.Item Incidence and predictors of Diabetes Mellitus: A 7- year community cohort follow-up of urban, adult Sri Lankans(Sri Lanka Medical Association., 2019) de Silva, S.T.; Ediriweera, D.; Beddage, T.; Kasturiratne, A.; Niriella, M.A.; de Silva, A.P.; Dassanayake, A.S.; Pathmeswaran, A.; Kato, N.; Wickremasinghe, A.R.INTRODUCTION & OBJECTIVES: There is limited data on incidence of type 2 diabetes mellitus (T2DM) from South Asia. We investigated incidence and predictors ofT2DM in an urban, adult population after seven-years of follow-up. METHODS: The study population (42-71 year-olds in 2014, selected by age-stratified random sampling from the Ragama MOH area) was initially screened in 2007 and re-evaluated in 2014 with informed written consent. On both occasions they were assessed by structured interview, anthropometric measurements, liver ultrasound, biochemical and serological tests. RESULTS: Of the 2986 enrolled in 2007, 737 had established T2DM giving a baseline prevalence of 24.7% (95% CI: 23.1%-26.2%). 2148/2984 (71.6%) of the original cohort attended follow-up [1237 (57.5%) women; median (IQR) 60 (54-66) years]. 1650 participants who did not have T2DM in 2007 presented for follow up; 436 (27.6%) of them had developed new T2DM by 2014, giving an annual incidence of 3.9% (95% CI: 3.0%-4.9%). Of 525 participants with pre-diabetes (HbA1c 5.7-6.4%) in 2007, 364 attended follow up and 201/364 (55.1%) had developed T2DM by 2014, giving an annual conversion rate of pre-diabetes to T2DM of 7.9%. On logistic regression, pre-diabetes (OR:4.4;95%CI:3.3%-6.0%), central obesity (OR: 1.8;95%CI: 1.3%-2.4%), dyslipidemia (OR: l.5;95%CI: 1.1 %-2.1 %) and non-alcoholic fatty liver disease (NAFLD) (OR:1.5;95%CI: 1.1 %-2.1%) showed significant association with incident T2DM. CONCLUSION: In this urban cohort, the annual incidence of T2DM was 3.9% and the annual conversion rate of pre-diabetes to T2DM was 7.9%. Our findings emphasize the need for targeted and intensive lifestyle interventions for individuals with high metabolic risk to prevent T2DM.