British Columbia Cancer Agency (BCCA) PHSAs Technology Development Office, Data Access Committee
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ABSTRACT:
PROVIDER: EGAC00001002968 | EGA |
REPOSITORIES: EGA
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Project description:Data Access Committee EGAC00001002903
| EGAC00001002903 | EGA
Project description:Data Access Committee EGAC00001000122
| EGAC00001000122 | EGA
Project description:Data Access Committee EGAC00001001636
| EGAC00001001636 | EGA
Project description:Data Access Committee EGAC00001000775
| EGAC00001000775 | EGA
Project description:The Genetic Association Information Network (GAIN) Data Access Committee was established in June 2007 to provide prompt and fair access to data from six genome-wide association studies through the database of Genotypes and Phenotypes (dbGaP). Of 945 project requests received through 2011, 749 (79%) have been approved; median receipt-to-approval time decreased from 14 days in 2007 to 8 days in 2011. Over half (54%) of the proposed research uses were for GAIN-specific phenotypes; other uses were for method development (26%) and adding controls to other studies (17%). Eight data-management incidents, defined as compromises of any of the data-use conditions, occurred among nine approved users; most were procedural violations, and none violated participant confidentiality. Over 5 years of experience with GAIN data access has demonstrated substantial use of GAIN data by investigators from academic, nonprofit, and for-profit institutions with relatively few and contained policy violations. The availability of GAIN data has allowed for advances in both the understanding of the genetic underpinnings of mental-health disorders, diabetes, and psoriasis and the development and refinement of statistical methods for identifying genetic and environmental factors related to complex common diseases.
| S-EPMC3617375 | biostudies-literature
Project description:Predictive testing (PT) for Huntington disease (HD) requires several in-person appointments. This requirement may be a barrier to testing so that at risk individuals do not realize the potential benefits of PT. To understand the obstacles to PT in terms of the accessibility of services, as well as exploring mechanisms by which this issue may be addressed, we conducted an interview study of individuals at risk for HD throughout British Columbia, Canada. Results reveal that the accessibility of PT can be a barrier for two major reasons: distance and the inflexibility of the testing process. Distance is a structural barrier, and relates to the time and travel required to access PT, the financial and other opportunity costs associated with taking time away from work and family to attend appointments and the stress of navigating urban centers. The inflexibility of the testing process barrier relates to the emotional and psychological accessibility of PT. The results of the interview study reveal that there are access barriers to PT that deter individuals from receiving the support, information and counseling they require. What makes accessibility of PT services important is not just that it may result in differences in quality of life and care, but because these differences may be addressed with creative and adaptable solutions in the delivery of genetic services. The study findings underscore the need for us to rethink and personalize the way we deliver such services to improve access issues to prevent inequities in the health care system.
| S-EPMC3548262 | biostudies-other
Project description:Introduction: There is conflicting evidence for the association between antihypertensive medications and colorectal cancer risk, possibly reflecting methodological limitations of previously conducted studies. Here, we aimed to clarify associations between commonly prescribed antihypertensive medication classes and colorectal cancer risk in a large, retrospective, cohort study. Methods: Using linked administrative data between 1996 and 2017 from British Columbia, we identified a cohort of 1,693,297 men and women who were 50 years of age or older, initially cancer-free and nonusers of antihypertensive medications. Medication use was parameterized as ever use, cumulative duration, and cumulative dose. Cox proportional hazard models were used to estimate hazard ratios (HRs) and associated 95% confidence intervals (95% CIs) for associations of time-varying medication use [angiotensin-converting enzyme inhibitors (ACEIs), angiotensin II receptor blockers (ARBs), beta-blockers (BBs), calcium channel blockers (CCBs), and diuretics] with colorectal cancer risk. Results: There were 28,460 incident cases of colorectal cancer identified over the follow-up period (mean = 12.9 years). When medication use was assessed as ever/never, diuretics were associated with increased risk of colorectal cancer (HR 1.08, 95% CI 1.04-1.12). However, no similar association was observed with cumulative duration or cumulative dose of diuretics. No significant associations between the other four classes of medications and colorectal cancer risk were observed. Conclusion: No compelling evidence of associations between antihypertensive medications and colorectal cancer were observed.
| S-EPMC10662292 | biostudies-literature
Project description:Sociodemographic correlates of engagement in human immunodeficiency virus (HIV) care are well studied, however the association with accessing drug resistance testing (DRT) and the development of drug resistance have not been characterized. Between 1996-2014, 11 801 HIV patients accessing therapy in British Columbia were observed longitudinally. A subset of 9456 patients had testable viral load; of these 8398 were linked to census data. Sociodemographic (census tract-level) and clinical (individual-level) correlates of DRT were assessed using multivariable General Estimating Equation logistic regression adjusted odds ratios (aOR). The mean number of tests per patient was 2.1 (Q1-Q3; 0-3). Separately, any drug resistance was determined using IAS-USA (2013) list for 5703 initially treatment naïve patients without baseline resistance; 5175 were census-linked (mean of 1.5 protease-reverse transcriptase sequences/patient, Q1-Q3; 0-2). Correlates of detecting drug resistance in this subset were analyzed using Cox PH regression adjusted hazard ratios (aHR). Our results indicate baseline CD4 <200 cells/μL (aOR: 1.5, 1.3-1.6), nRTI-only baseline regimens (aOR: 1.4, 1.3-1.6), and unknown (therapy initiation before routine pVL in BC) baseline pVL (aOR: 1.8, 1.5-2.1) were among individual-level clinical covariates strongly associated with having accessed DRT; while imperfect adherence (aHR: 2.2, 1.9-2.5), low baseline CD4 count (aHR: 1.9, 1.6-2.3), and high baseline pVL (aHR: 2.0, 1.6-2.6) were associated with a higher likelihood of developing drug resistance. A higher median income (aOR: 0.83, 0.77-0.89) and higher percentage of those with aboriginal ancestry (aOR: 0.85, 0.76-0.95) were census tract-level sociodemographic covariates associated with decreased access to DRT. Similarly, aboriginal ancestry (aHR: 1.2, 1.1-1.5) was associated with development of drug resistance. In conclusion, clinical covariates continue to be the strongest correlates of development of drug resistance and access to DRT for individuals. Regions of high median income and high aboriginal ancestry were weak census-level sociodemographic indicators of reduced DRT uptake, however high aboriginal ancestry was the only sociodemographic indicator for development of drug resistance.
| S-EPMC5609746 | biostudies-literature
Project description:BackgroundExpenditure on systemic therapy for cancer has been increasing quickly owing to population growth, increased use, both in the number of users and in prescription volume, and rising drug prices. Our objective was to describe trends in expenditure in British Columbia and Saskatchewan's cancer care systems and to elucidate these drivers of growth.MethodsIn this trend analysis, we obtained pharmacy dispensing records from the BC Cancer and Saskatchewan Cancer Agency pharmacies for all anticancer therapies dispensed in 2006-2013. We calculated total annual expenditure directly from the data and conducted a trend analysis of crude and standardized annual expenditure using generalized linear models. We estimated trends in the following components of total expenditure: cancer incidence, number of systemic therapy users per incident case, number of dispensed prescriptions per user and cost per prescription. Analysis was stratified by patient age group, cancer site and route of administration (oral or intravenous/other).ResultsExpenditure on systemic therapies, adjusted for population growth and aging, increased an average of 9.2% (95% confidence interval [CI] 7.2 to 11.2) per year in Saskatchewan and 6.4% (95% CI 5.3 to 7.6) per year in BC. Growth in expenditure on orally administered agents was more than 2 times higher than growth in expenditure on intravenous/other agents. Growth rates varied significantly by cancer site. In both provinces, rising cost per prescription was the largest contributor to overall growth.InterpretationPrice is the primary driver of growth in systemic therapy expenditure in both BC and Saskatchewan. Understanding the mechanisms of expenditure growth may inform system planning and support policy-makers' efforts to manage rising costs.
| S-EPMC6182106 | biostudies-literature
Project description:ImportanceDiagnosis of mental disorder is prevalent among people who have been incarcerated. Nevertheless, community mental health services are often limited following release from prison, and reincarceration rates are high. The prevalence of mental disorders is growing among people who are incarcerated in British Columbia (BC), Canada, increasing the urgency of timely and accessible mental health services after release.ObjectiveTo examine the association of mental health services access and timeliness of services access with reincarceration risk among people released from prison.Design, setting, and participantsIn this cohort study, mental disorder diagnoses were derived from International Classification of Diseases, Ninth Revision or International Statistical Classification of Diseases and Related Health Problems, Tenth Revision codes in administrative health records. Data on prison release and reincarceration were retrieved from corrections records. Population-based health and corrections data were retrieved from the BC Provincial Overdose Cohort, which contains a 20% general population random sample of 1 089 677 BC residents. This study examined releases from provincial prisons between January 1, 2015, and December 31, 2018, among people in the 20% random sample who had a mental disorder diagnosis in the year before their release. Analyses were performed from January to June 2022.ExposuresMental health services access (primary care, emergency department visits, or hospitalization) and sociodemographic, health, and incarceration characteristics.Main outcomes and measuresA multistate modeling approach was taken. Cox proportional hazards models were stratified by transition, from release to reincarceration, with and without mental health services access. A state arrival extended model examined the influence of timeliness of mental health services access on subsequent hazard of reincarceration.ResultsA total of 4171 releases among 1664 people (3565 releases among male individuals [84.6%]; 2948 releases [70.7%] among people <40 years old; 2939 releases [70.5%] among people with concurrent substance use disorder diagnosis) were identified. The total study follow-up time was 2834.53 person-years, with a mean (SD) of 0.68 (0.93) years and median (IQR) of 0.25 (0.07-0.84) years per release. Mental health services access was associated with a reduction in the hazard of reincarceration (hazard ratio, 0.61; 95% CI, 0.39-0.94). For each additional month between release and mental health services access, the hazard of reincarceration was increased by 4% (hazard ratio, 1.04; 95% CI, 1.01-1.07).Conclusions and relevanceIn this cohort study of people with mental disorder diagnoses released from prison in BC, mental health services access was associated with reduced reincarceration risk. These findings suggest that these services may have the greatest impact on reducing reincarceration risk when they are available in a timely manner in the days and weeks immediately following release.
| S-EPMC9856264 | biostudies-literature