Publications by authors named "Duncan Saunders"

Background And Objectives: The need to centralize patients for specialty care in the setting of regionalization may delay access to specialist services and compromise outcomes, particularly in a large geographic area. The aim of this study was to explore the effects of interhospital transferring of children requiring intensive care in a Canadian regionalization model.

Methods: A retrospective cohort design with a matched pair analysis was adopted to compare the outcomes in children younger than 17 years admitted to a pediatric intensive care unit (PICU) of a Canadian children's hospital by a specialized transport team (pediatric critical care transported [PCCT] group) and those children admitted directly to PICU from its pediatric emergency department (PED group).

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Purpose: To explore the impact of a physician non-accompanying pediatric critical care transport program, and to identify factors associated with the selection of specific transport team compositions.

Materials And Methods: Children transported to a Canadian academic children's hospital were included. Two eras (Physician-accompanying Transport (PT)-era: 2000-07 when physicians commonly accompanied the transport team; and Physician-Less Transport (PLT)-era: 2010-15 when a physician non-accompanying team was increasingly used) were compared with respect to transport and PICU outcomes.

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Objective: Specialized pediatric critical care transport teams are essential to pediatric retrieval systems. This study aims to describe the contemporary transports performed by a Canadian pediatric critical care transport team and to compare the treatment and outcomes of children referred from high-level care (hospitals offering pediatric services where an adult ICU exists) and nonhigh-level care (all other hospitals) hospitals.

Design: A descriptive cohort study.

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Setting: The prairie provinces of Canada.

Objective: To characterize tuberculosis (TB) transmission among the Indigenous and non-Indigenous Canadian-born peoples of the prairie provinces of Canada.

Design: A prospective epidemiologic study of consecutively diagnosed adult (age ≥ 14 years) Canadian-born culture-positive pulmonary TB cases on the prairies, hereafter termed "potential transmitters," and the transmission events generated by them.

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Background: The Government of Malawi is seeking evidence to improve implementation of its flagship quality of care improvement initiative-the Standards Based Management-Recognition for Reproductive Health (SBM-R(RH)).

Objective: This implementation study will assess the quality of maternal healthcare in facilities where the SBM-R(RH) initiative has been employed, identify factors that support or undermine effectiveness of the initiative and develop strategies to further enhance its operation.

Methods: Data will be collected in 4 interlinked modules using quantitative and qualitative research methods.

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Community health workers (CHWs) can help to redress the shortages of health human resources needed to scale up antiretroviral treatment (ART). However, the selection of CHWs could influence the effectiveness of a CHW programme. The purpose of this observational study was to assess whether sociodemographic characteristics and geographic proximity to patients of volunteer CHWs were predictors of clinical outcomes in a community-based ART (CBART) programme in Kabarole, Uganda.

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Objective: The HIV/AIDS epidemic disproportionately involves socially vulnerable populations. Since 2001, the proportion of foreign-born patients served by the Northern Alberta HIV Program has increased. Our study aimed to evaluate antiretroviral therapy (ART) outcomes among HIV-infected foreign-born patients in northern Alberta, Canada, prescribed once-daily ART.

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Background: Bicycling related head injuries (HIs) can be severe. Helmet use reduces head injury risk; however, there are few controlled studies of the effect of helmet legislation. We conducted this study to investigate changes in HIs after bicycle helmet legislation targeting those <18 in Alberta, Canada in 2002.

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Beijing strains are speculated to have a selective advantage over other Mycobacterium tuberculosis strains because of increased transmissibility and virulence. In Alberta, a province of Canada that receives a large number of immigrants, we conducted a population-based study to determine whether Beijing strains were associated with increased transmission leading to disease compared with non-Beijing strains. Beijing strains accounted for 258 (19%) of 1,379 pulmonary tuberculosis cases in 1991-2007; overall, 21% of Beijing cases and 37% of non-Beijing cases were associated with transmission clusters.

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Objective: We compared the health-related quality of life (HRQL) of Aboriginal and non-Aboriginal HIV patients after they started highly active antiretroviral therapy (HAART) in Edmonton, Alberta and investigated whether clinical status (CD4 cell count and viral load) might explain any observed differences.

Methods: In 2006-2007, eligible patients who started HAART in 1997-2005 completed the MOS-HIV to measure HRQL. Using multiple linear regression models, we compared physical (PHS) and mental (MHS) health summary scores across four groups: Aboriginals infected with HIV via injection drug use (AB/IDUs); Aboriginal non-IDUs (AB/non-IDUs); non-Aboriginal IDUs (non-AB/IDUs); and non-Aboriginal non-IDUs (non-AB/non-IDUs).

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Background: In sub-Saharan Africa, a shortage of trained health professionals and limited geographical access to health facilities present major barriers to the expansion of antiretroviral therapy (ART). We tested the utility of a health centre (HC)/community-based approach in the provision of ART to persons living with HIV in a rural area in western Uganda.

Methods: The HIV treatment outcomes of the HC/community-based ART program were evaluated and compared with those of an ART program at a best-practice regional hospital.

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Introduction: Mycobacterium tuberculosis Beijing strains are frequently associated with tuberculosis outbreaks and drug resistance. However, contradictory evidence and limited study generalizability make it difficult to foresee if the emergence of Beijing strains in high-income immigrant-receiving countries poses an increased public health threat. The purpose of this study was to determine if Beijing strains are associated with high risk disease presentations relative to other strains within Canada.

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Background: Improved availability of antiretroviral therapy in sub-Saharan Africa is intended to benefit all eligible HIV-infected patients; however in reality antiretroviral services are mainly offered in urban hospitals. Poor rural patients have difficulty accessing the drugs, making the provision of antiretroviral therapy inequitable. Initial tests of community-based treatment programs in Uganda suggest that home-based treatment of HIV/AIDS may equal hospital-based treatment; however the literature reveals limited experiences with such programs.

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Background: Bicycle trauma is a common cause of recreational death and disability and helmets have been shown to reduce fatal and non-fatal head and face injuries. This study evaluated the effect of mandatory bicycle helmet legislation for all ages in St. Albert, Alberta.

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Background: Aboriginals are over-represented in Canada's HIV epidemic and are commonly infected with HIV via injection drug use (IDU); however, little is known about the impact of Aboriginal ethnicity on mortality after starting highly active antiretroviral therapy (HAART). Therefore, we compared mortality rates between Aboriginal and non-Aboriginal HIV patients and between IDU and non-IDU HIV patients after they initiated HAART.

Methods: We conducted a retrospective cohort study of antiretroviral-naïve patients starting HAART January 1999-June 2005 (baseline), followed until December 2005.

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Ugandan policy regarding infant feeding for HIV-positive mothers is replacement feeding (RF), if feasible; otherwise, exclusive breastfeeding (EBF) for 3 months is advised (or EBF for 6 months, if RF is still not feasible). HIV-negative mothers should practise EBF for 6 months. The study objective was to explore the association between maternal HIV status and breastfeeding practices in Kabarole, Uganda.

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The purpose of this study was to examine gender differences in mortality for human immunodeficiency virus (HIV) patients in rural Western Uganda after six months of highly active antiretroviral therapy (HAART). Three hundred eighty five patients were followed up for six months after initiating HAART. Statistical analysis included descriptive, univariate and multivariate methods, using Kaplan-Meier estimates of survival distribution and Cox proportional hazards regression.

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Objectives: This representative, cross-sectional study conducted in Kabarole District, Western Uganda, determined the nutritional status of children 6-59 months of age and established a trend in the childhood stunting rates.

Methods: A multi-stage random cluster sampling was performed to select 322 children and their principal caregivers. Anthropometric measurements were taken from the children and compared with a reference population and the children's principle caregivers were interviewed.

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Gender differences in treatment outcomes of 305 persons living with HIV receiving antiretroviral treatment (ART) in Kabarole district, western Uganda, were evaluated. The primary treatment outcome was virological suppression defined as HIV-1 RNA viral load (VL) <400 copies/ml and the secondary outcome measure was the increase in the CD4 cell count after six months on ART. Statistical analysis included descriptive, univariate, and multivariate methods.

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Objective: Community-based antiretroviral treatment (CBART) programs should aim to achieve positive quality of life outcomes. The purpose of this study was to investigate changes in the health related quality of life (HRQOL) outcomes of patients in a CBART program supported by community volunteers in one sub-county in western Uganda located 50 km from the nearest urban centre.

Methods: We administered a translated version of the MOS-HIV survey and collected clinical data at baseline and after one year from 130 patients.

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Objective: To compare the treatment outcomes and mortality in a rural community-based ART (CBART) program with a hospital-based ART program in the same district.

Methods: The study design was a non-randomized cohort study consisting of 185 persons living with HIV (PLWHIV) in the CBART cohort and 200 PLWHIV in the hospital cohort. Eligibility for both cohorts was: being HIV-infected and eligible for ART, being treatment naïve, age 18 years or older, and being a resident of Rwimi sub-county.

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A study on knowledge about HIV/AIDS and antiretroviral therapy (ART) was conducted in the general population of a rural district in western Uganda. Three hundred seventy-two participants were selected by random cluster sampling and interviewed with an interview-administered questionnaire. Data were analyzed quantitatively with descriptive, univariate and linear multivariate statistical analysis with the knowledge score about ART as the dependent variable.

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Objective: The goal of this study was to assess the validity of the International Classification of Disease, 10th Version (ICD-10) administrative hospital discharge data and to determine whether there were improvements in the validity of coding for clinical conditions compared with ICD-9 Clinical Modification (ICD-9-CM) data.

Methods: We reviewed 4,008 randomly selected charts for patients admitted from January 1 to June 30, 2003 at four teaching hospitals in Alberta, Canada to determine the presence or absence of 32 clinical conditions and to assess the agreement between ICD-10 data and chart data. We then re-coded the same charts using ICD-9-CM and determined the agreement between the ICD-9-CM data and chart data for recording those same conditions.

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Background And Objective: This study examined prenatal, perinatal and early childhood predictors of wheezing phenotypes in the first decade of life.

Methods: Information on current wheezing, was collected prospectively from five surveys conducted every 2 years over the first decade of life. Five wheezing phenotypes were defined: non-wheezers, preschool, primary-school, intermittent and persistent wheezers.

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