Chandima Karunanayake

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BACKGROUND Increased daytime sleepiness is an important symptom of obstructive sleep apnea (OSA). OSA is frequently underdiagnosed, and the Epworth Sleepiness Scale (ESS) can be a useful tool in alerting physicians to a potential problem involving OSA. OBJECTIVE To measure the prevalence and determinants of daytime sleepiness measured using the ESS in a(More)
The objective of this study was to investigate the putative associations of specific pesticides with multiple myeloma. A matched, population-based, case-control study was conducted among men residing in six Canadian provinces (Quebec, Ontario, Manitoba, Saskatchewan, Alberta, and British Columbia). Data were collected on 342 multiple myelome cases and 1506(More)
The objective of this study was to investigate the putative associations of specific pesticides with Hodgkin lymphoma. A population-based, case-control study of Hodgkin lymphoma was conducted among males in six regions of Canada. Data were collected by a mailed questionnaire followed by a telephone interview to obtain detailed exposures data for those(More)
Research has shown that ethnicity is a significant predictor of Hodgkin lymphoma (HL). Variations in cancer incidence among ethnic groups in the same country can lead to important information in the search for etiological factors. Other risk factors important in the etiology of HL are medical history and exposure to pesticides. In this report we(More)
OBJECTIVE To determine if vitamin D intake is associated with acute lower respiratory infections (ALRI) in children. METHODS The vitamin D intakes of children younger than 5 years of age admitted to hospital with either bronchiolitis or pneumonia were compared to an unmatched control group of the same age without respiratory infection. Caregivers of 197(More)
INTRODUCTION Immigration continues to transform the ethnic composition of the Canadian population. We investigated whether longitudinal trends in mental distress vary between seven cultural and ethnic groups and whether mental distress within the same ethnic group varies by demographic (immigrant status, sex, age, marital status, place and length of(More)
OBJECTIVES The objective was to investigate the putative associations of specific pesticides with soft-tissue sarcoma (STS). METHODS A Canadian population-based case-control study conducted in six provinces was used in this analysis. The study design consisted of two stages: a self-administered postal questionnaire and a telephone interview for those(More)
OBJECTIVES This study examined nursing aides' (NAs) perspectives of specific incidents of combative behavior from nursing home residents with dementia, particularly their attributions for the behaviors. DESIGN This research is part of a larger mixed-method study exploring combative behavior as experienced by NAs. The data for this component were collected(More)
BACKGROUND Predictors of new and long-term respiratory symptoms for rural residents are not well defined. OBJECTIVE To identify early predictors of respiratory symptoms in a rural community population. METHODS The study population consisted of 871 adults living in the rural community of Humboldt, Saskatchewan, who participated in two cross-sectional(More)
BACKGROUND Researchers have historically reported that farm children have a lower prevalence of asthma compared to more urban children. Potential explanations include theories surrounding differences in personal factors, access to health care, engagement in health risk behaviors, and differences in the environment. OBJECTIVE The aims of this study were(More)