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This repository contains the published and unpublished research of the Faculty of Medicine by the staff members of the faculty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 impact of COVID-19 on health care accessibility and financial risk protection in Sri Lanka(Sri Lanka Medical Association, 2023) Nandasena, S.; Gamage, A.U.; Periyasamy, N.; Rismy, M.; Balachandran, K.; Kasturiratne, A.INTRODUCTION: The COVID-19 pandemic negatively impacted the global economy, disrupted essential health services, and distorted social determinants of health, reducing healthcare accessibility and increasing financial risk. AIM: we aimed to assess the impact of COVID-19 on healthcare accessibility and financial risk protection in Sri Lanka. METHODOLOGY: We conducted a cross-sectional study on a representative sample (multi-stage sampling process) of 3151 households in 105 clusters representing all the districts of Sri Lanka. The data collection was conducted using an interviewer-administered questionnaire in early November 2021. This was important to classify three periods of interest, namely: (1) the pre-lockdown period (2) the nationwide lockdown period, and (3) the new normal period. (After Oct 1 to early November 2021). RESULTS: Among 11,463 household occupants, 12.6% reported having chronic diseases, with 76.5% diagnosed prior to six months. The majority had heart disease, high blood pressure, or diabetes. Of them, 53.7% have been followed up during the lockdown, increasing to 80.8% in the new normal period. Provincial variations in expenses were observed, with the highest food expenses in the Western Province. Catastrophic health expenditures affected 9.5% and 3.4% of households at 10% and 25%, respectively. CONCLUSIONS: A considerable proportion of those having heart disease, high blood pressure, high blood sugar or diabetes mellitus were not followed up in the lockdown period and the first month of the new normal period. Antenatal care and family planning were the least affected. Participants had incurred high out-of-pocket expenditures for healthcare during the entire period.Item Effects of indoor air pollution on the development of children under five years of age in Sri Lanka(MDPI, 2022) Ranathunga, N.; Perera, P.; Nandasena, S.; Sathiakumar, N.; Kasturiratne, A.; Wickremasinghe, R.Air pollution is a multifaceted environmental toxin affecting the Central Nervous System (CNS) through diverse pathways. The CNS of young children is particularly susceptible to the detrimental effects of toxins, as brain development continues postnatally with the formation of interneuronal connections, glial cell proliferation and myelination of axons. Indoor air pollution (IAP) from solid fuel combustion is more harmful than outdoor air pollution. Numerous air pollutants hazardous to health are released during the burning of unprocessed biomass. The primary source of fuel in Sri Lanka for cooking is biomass, mainly wood. In this study, we evaluated the influence of IAP resulting from biomass combustion on the neurodevelopment of children. In a cohort of children under five years living in a semi-urban area of Sri Lanka, neurodevelopment was assessed using Denver II developmental screening test. Air quality levels were measured (Carbon Monoxide (CO) and Particulate Matter 2.5 (PM2.5)) in a subsample. There were significantly high levels of CO and PM2.5 in the ambient air of households using biomass as the primary fuel for cooking. Children living in these households had a significantly higher number of children with ‘suspect’ developmental assessment scores in the language, social behavior and play and gross motor development domains.Item Effects of indoor air pollution due to solid fuel combustion on physical growth of children under 5 in Sri Lanka: A descriptive cross sectional study(Public Library of Science, 2021) Ranathunga, N.; Perera, P.; Nandasena, S.; Sathiakumar, N.; Kasturiratne, A.; Wickremasinghe, A.R.ABSTRACT: Solid fuel combustion is an important risk factor of morbidity. This study was conducted to determine the effect of indoor air pollution (IAP) due to solid fuel combustion on physical growth in 262 Sri Lankan children under five. Exposure was defined by the type of fuel used for cooking. Pollutant levels were measured in a subsample of households. "High" exposure group (households using biomass fuel/kerosene oil for cooking) comprised 60% of the study population; the prevalence of wasting was 19.7% and underweight was 20.4% in the entire population where 68% were from the high exposure group. Children from the "high" exposure group had significantly lower mean z-scores for weight-for-height (p = 0.047), height-for-age (p = 0.004) and weight-for-age (p = 0.001) as compared to the "low" exposure group (children of households using liquefied petroleum gas and/or electricity) after adjusting for confounders. Z-scores of weight-for-age, height-for-age and weight-for-height were negatively correlated with CO (p = 0.001, 0.018, 0.020, respectively) and PM2.5 concentrations (p<0.001,p = 0.024 p = 0.008, respectively). IAP due to combustion of biomass fuel leads to poor physical growth.Item Ecology of healthcare: Symptom prevalence and health care seeking behaviour in Gampaha District, Sri Lanka(Sri Lanka Medical Association., 2019) Withana, S. S.; Mendis, K.; Nandasena, S.; Wickremasinghe, A.R.INTRODUCTION & OBJECTIVES: In 20 J 5, the Ministry of Health reported that 55 million outpatient visits were made to government OPDs and estimates 100 million visits by 2027. We studied the community symptom prevalence, associated factors and the trends in healthcare seeking behaviour in the Gampaha district. METHODS: A community-based prospective study, using a participant held symptom diary and interviews was conducted from May to June 20 J 8 in three Public Health Midwife areas each from Raga ma (urban) and Mirigama (rural) MOH areas. RESULTS: We invited 2330 individuals from 557 households and 2046 participated. Majority were: females. (n=l 127, 55.1%). Highest recruitment was from Mirigama area (n=1207, 59%). Of the study population 1919 (93.8%) reported at least one symptom. Phlegm (n=4871, 7.2%) had the highest frequency, musculoskeletal symptoms were the highest (26.8%) as a group. Females had a higher symptom prevalence (p = 0.001). Employment, income, having a chronic disease and distance to healthcare institution were significantly (p < 0.05) associated with both symptom prevalence and healthcare seeking behaviour. How the symptoms were managed: Ignored symptoms (n=l53, 8%), Self-care (n=560, 29.2%) and Seeking healthcare (n=924, 48.1%). Majority (n=763,82.6%) sought allopathic treatment, of whom 515 (55.7%) chose private sector ambulatory care. Of the 43 (2.2%) hospital admissions, 28 (65%) were to government hospitals. CONCLUSION: People in Gampaha District have a high symptom prevalence (93.8%) and healthcare seeking behaviour (48.1%) compared to USA which was (80%) and (32.7%) respectively. Gender did not influence the healthcare seeking behaviour. Majority (55%) preferred private allopathic ambulatory care.Item Effect of household air pollution due to solid fuel combustion on childhood respiratory diseases in a semi urban population in Sri Lanka.(BioMed Central, 2019) Ranathunga, N.; Perera, P.; Nandasena, S.; Sathiakumar, N.; Kasturiratne, A.; Wickremasinghe, R.BACKGROUND:Household air pollution from combustion of solid fuels for cooking and space heating is one of the most important risk factors of the global burden of disease. This study was aimed to determine the association between household air pollution due to combustion of biomass fuel in Sri Lankan households and self-reported respiratory symptoms in children under 5 years. METHODS: A prospective study was conducted in the Ragama Medical Officer of Health area in Sri Lanka. Children under 5 years were followed up for 12 months. Data on respiratory symptoms were extracted from a symptom diary. Socioeconomic data and the main fuel type used for cooking were recorded. Air quality measurements were taken during the preparation of the lunch meal over a 2-h period in a subsample of households. RESULTS: Two hundred and sixty two children were followed up. The incidence of infection induced asthma (RR = 1.77, 95%CI;1.098-2.949) was significantly higher among children resident in households using biomass fuel and kerosene (considered as the high exposure group) as compared to children resident in households using Liquefied Petroleum Gas (LPG) or electricity for cooking (considered as the low exposure group), after adjusting for confounders. Maternal education was significantly associated with the incidence of infection induced asthma after controlling for other factors including exposure status. The incidence of asthma among male children was significantly higher than in female children (RR = 1.17; 95% CI 1.01-1.37). Having an industry causing air pollution near the home and cooking inside the living area were significant risk factors of rhinitis (RR = 1.39 and 2.67, respectively) while spending less time on cooking was a protective factor (RR = 0.81). Houses which used biomass fuel had significantly higher concentrations of carbon monoxide (CO) (mean 2.77 ppm vs 1.44 ppm) and particulate matter2.5 (PM2.5) (mean 1.09 mg/m3 vs 0.30 mg/m3) as compared to houses using LPG or electricity for cooking. CONCLUSION: The CO and PM2.5 concentrations were significantly higher in households using biomass fuel for cooking. There was a 1.6 times higher risk of infection induced asthma (IIA) among children of the high exposure group as compared to children of the low exposure group, after controlling for other factors. Maternal education was significantly associated with the incidence of IIA after controlling for exposure status and other variables.Item Health and social impact of indoor air pollution(Faculty of Medicine, University of Kelaniya, Sri Lanka, 2016) Nandasena, S.Indoor air pollution from combustion of solid fuel used for cooking and heating is one of the 10 leading contributors to the global burden of disease. Three billion of the world’s population and up to 90% of rural households in developing countries and 78% of Sri Lankan households still rely on solid fuel for cooking. Out of the households that use solid fuel for cooking, about 65% cook inside the main households. Only 72% of such households have a chimney. Reported air quality levels in the majority of Sri Lankan households are several fold higher than the WHO guideline values. Infiltration of air pollutants from outdoors is a key source of indoor air pollution in urban settings especially if the households are close to industries and major roads. The evidence for indoor air pollution and acute respiratory infections in children and chronic obstructive pulmonary disease or chronic bronchitis in women is compelling, while effects on adverse pregnancy outcomes, low birth weight and infant neurodevelopment is growing.Item Beliefs and knowledge regarding snakebite in rural Sri Lanka: a qualitative survey(Sri Lanka Medical Association, 2003) Makita, L.S.; Nandasena, S.; Costa, M.R.A.; Kasturiratne, A.; Pathmeswaran, A.; Lalloo, D.G.; de Silva, H.J.OBJECTIVES: To identify common beliefs and assess knowledge regarding snakebite in rural Sri Lanka, and their influence on health-seeking behaviour. METHODS: Qualitative methods (focus group discussions and key informant interviews) were used to obtain data in five rural locations in wet, intermediate and dry zones. Data was subjected to "framework analysis" involving familiarisation, identification of thematic frame, indexing and coding, charting, mapping, and interpretation. RESULTS: People are aware of risk-behaviour associated with snakebite, and have reasonable knowledge regarding venomous and non-venomous snakes. However, differences in nomenclature sometimes lead to confusion in identifying species. Beliefs and legends, which are linked to religion, have lead people to respect the cobra. Traditional healers claim they can determine the snake species, clinical manifestations that may occur, and prognosis, based on phenomena, such as, day of the week and phase of the moon when the bite took place. They still employ treatment methods, such as wound incision with broken glass and scalp incision for applying potions. Although there is respect for traditional healing, there is acceptance of the efficacy of western medicine. Beliefs, such as, anti-venom though effective is toxic, long-term effects of snake venom can be completely neutralised only by traditional medicine, and producing the dead snake is essential for treatment in hospitals, lead people to seek treatment by traditional healers rather than in hospitals. CONCLUSIONS: Beliefs and misconceptions influence health-seeking behaviour following snakebite. There seems to be a growing acceptance of western medicine. However, traditional healing methods are still popular, but include harmful^rjractices. This information could form a basis for. educational intervention.Item Geographical variations of goitre prevalence in Sri Lanka: visualisation with geographic information systems(Sri Lanka Medical Association, 2012) Fernando, R.; Pathmeswaran, A.; Nandasena, S.INTRODUCTION: Widely held beliefs about the geographical distribution of goiter prevalence in Sri Lanka are not based on reliable data. Geographic Information Systems provide an excellent means to visualize and present epidemiological data. AIMS: To map and explore the geographical variation of goiter prevalence in Sri Lanka METHODS: An island-wide representative sample of residents (n=5200) from 95 Gramasewa Niladhari (GN) divisions in 87 Divisional Secretariats (DS) were screened for goiter. A subsample was investigated for thyroiditis. Digital maps were developed to visualize the goiter and thyroiditis prevalence across the country. Maps were developed for the GN and DS level representations. Based on the data from 95 GN divisions, goiter prevalence was estimated for the un-sampled areas of the country using the interpolation techniques. ArcGIS 10.0 software was used for analysis. RESULTS: A total of 426 goiters and 177 thyroiditis cases were identified. The male and female goiter prevalence showed similar patterns of geographical variation. The DS_.divisions with goiter prevalence more than 15% were seen distributed across the country without any discernible pattern. Distribution of thyroiditis exhibited a similar pattern. There was some evidence of clustering together of areas/ GN divisions with a similar prevalence of goiter but it was not possible to demarcate large contiguous areas ('zones'] with a similar prevalence of goiter. CONCLUSIONS: Geographical distribution of goiter prevalence did not show any large regional or zonal variations. Areas of high and low prevalence were distributed randomly across the country.Item Identifying the offending species in snakebite: a clinical score for use in community based epidemiological surveys(Sri Lanka Medical Association, 2004) Pathmeswaran, A.; Fonseka, M.M.D.; Kasturiratne, A.; Nandasena, S.; Gnanatilaka, G.K.; Gunaratne, L.; de Silva, A.P.; Lalloo, D.C.; de Silva, H.J.INTRODUCTION: Hospital data on snakebite fails to account for victims who do not reach hospital or who seek alternative treatment. In community surveys, identification of biting species is very difficult because the offending snake may sometimes not even be seen, is infrequently captured or killed, and antigen detection cannot be used in this setting. OBJECTIVE: To develop and validate a clinical score to identify biting species. METHODS: We identified 10 features relating to bites of the 6 venomous snakes in Sri Lanka (3 relating to circumstances of a bite and 7 clinical features of envenoming). Based on these, we developed a score applying different weightings to individual features depending on the species of snake. We then constructed 60 artificiaLdata sets containing different clinical scenarios, typical and atypical, for bites of a particular species. They were used to make adjustments to the score and determine cut-off values for identification (total ≥60/100 + difference of ≥5/100 from second highest score). The score was prospectively validated on 134 cases of snakebite with definite species identification, six months after the incident. RESULTS: Data were available from 25 cobra bites, 32 hump-nosed viper bites, 27 krait bites, 30 Russel's viper bites and 20 saw-scaled viper bites. Sensitivity/specificity of the score were: cobra 76/99, kraits 85/99, RV 70/99, HNV 97/83, SSV 100/83. 114 (85%) cases were correctly identified. 17 (12.7%) were misidentified, and 3 (2.3%) could not be identified. Conclusions: This score identifies the offending snake species with reasonable accuracy, and may be suitable for use in epidemiologicai surveys.Item Epidemiology of goitres in Sri Lanka with Geographic Information System Mapping: a population based cross sectional study(Jaypee Publishers, 2015) Fernando, R.; Chandrasinghe, P.C.; Nandasena, S.; Pathmeswaran, A.BACKGROUND: Sri Lanka is considered an endemic region for goiter. Early researchers have suggested the existence of a goiter belt based on rainfall pattern. Subsequent studies done in school children have challenged this theory. Current study is a community-based cross-sectional study done to assess the epidemiology of goiters. Geographic information system (GIS) mapping of the goiter prevalence is developed for the first time in Sri Lanka. METHODS: Study subjects were selected using a multi-staged cluster sampling with probability proportionate to size (PPS) method. Examination for the presence of goiters was done by two trained investigators and graded. ArcGIS 10 software was used for geostatistical analysis and developing a map by interpolating the data collected for the first time in Sri Lanka. RESULTS: A total of 5200 individuals (female-66%, median age-38 years; range 10-92 years) were assessed and 426 goiters were detected. The adjusted prevalence rate of goiters was 6.8%. Kriging interpolation method was used to develop the most appropriate epidemiological map clustering of high prevalence areas with scattered pockets of high prevalence was observed. Current map does not show a prevalence pattern in relation to the rainfall or elevation above sea level as proposed in the past. CONCLUSION: Goiter prevalence in Sri Lanka appears to be different from earlier proposed patterns. Use of GIS has contributed to develop a comprehensive epidemiological map of goiters demonstrating the absence of an endemic goiter belt in the wet zone as proposed earlier.