Rick T Pelletier

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Counting animals to estimate their population sizes is often essential for their management and conservation. Since practitioners frequently rely on indirect observations of animals, it is important to better understand the relationship between such indirect indices and animal abundance. The Formozov-Malyshev-Pereleshin (FMP) formula provides a theoretical(More)
Living far away from specialized care centers is a potential barrier to the delivery of quality health care and has been associated with adverse outcomes. To assess mortality as a function of distance from the closest hemodialysis unit, and as a function of rural rather than urban residence, we analyzed prospectively collected data on 726,347 adults(More)
BACKGROUND There has been little research exploring the experience of dialysis therapy for people living in remote communities. Remote residence location has previously been associated with excess mortality in hemodialysis (HD) patients, suggesting that relocation to a referral center might improve outcomes. It is unknown whether patients view this approach(More)
BACKGROUND Ambulatory care-sensitive conditions have been described as those that (if appropriately managed in an outpatient setting) generally do not require subsequent hospitalization. Our goal was to identify clinical populations of people who are at the highest risk of ambulatory care-sensitive conditions related to chronic kidney disease (CKD). STUDY(More)
BACKGROUND AND OBJECTIVES Patients with kidney failure sometimes do not receive chronic renal replacement therapy (RRT), even though this may reduce their life expectancy. This study aimed to identify factors associated with initiation of chronic RRT. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS This cohort study was conducted with Albertans aged >18(More)
BACKGROUND We hypothesized that the higher mortality for hemodialysis patients who live farther from the closest attending nephrologist compared with patients living closer might be due to lower quality of care. STUDY DESIGN Population-based longitudinal study. SETTING & PARTICIPANTS All adult maintenance hemodialysis patients with measurements of(More)
Oil sands mining has been linked to increasing atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) in the Athabasca oil sands region (AOSR), but known sources cannot explain the quantity of PAHs in environmental samples. PAHs were measured in living Sphagnum moss (24 sites, n = 68), in sectioned peat cores (4 sites, n = 161), and snow (7(More)
Sphagnum moss was collected from 21 ombrotrophic (rain-fed) peat bogs surrounding open pit mines and upgrading facilities of Athabasca bituminous sands in Alberta (AB). In comparison to contemporary Sphagnum moss from four bogs in rural locations of southern Germany (DE), the AB mosses yielded lower concentrations of Ag, Cd, Ni, Pb, Sb, and Tl, similar(More)
Ombrotrophic Bogs in the Athabasca Bituminous Sands Region Show No Significant Atmospheric Contamination of ‘Heavy Metals’” L concentrations had been measured in three samples collected from each of 21 peat bogs, and the values averaged. These values are now shown for individual moss samples as a function of distance from the midpoint between the two(More)
Patients with proteinuria are at high risk of cardiovascular and renal complications. Since this risk can be reduced by appropriate interventions, we hypothesized that remote dwellers, who are known to have lower access to health care, might have a higher risk of complications. Using a database of all adults with at least one measure of urine protein(More)