431 research outputs found
McDonald's in Southeast Asia: industrial organization and foreign direct involvement
Master of ArtsCenter for Southeast Asian StudiesUniversity of Michiganhttps://deepblue.lib.umich.edu/bitstream/2027.42/149073/1/013852787.pd
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Quality of Care in the United Kingdom after Removal of Financial Incentives.
BACKGROUND: The benefits of pay-for-performance schemes in improving the quality of care remain uncertain. There is little information on the effect of removing incentives from existing pay-for-performance schemes. METHODS: We conducted interrupted time-series analyses of electronic medical record (EMR) data from 2010 to 2017 for 12 quality-of-care indicators in the United Kingdom's Quality and Outcomes Framework for which financial incentives were removed in 2014 and 6 indicators for which incentives were maintained. We estimated the effects of removing incentives on changes in performance on quality-of-care measures. RESULTS: Complete longitudinal data were available for 2819 English primary care practices with more than 20 million registered patients. There were immediate reductions in documented quality of care for all 12 indicators in the first year after the removal of financial incentives. Reductions were greatest for indicators related to health advice, with a reduction of 62.3 percentage points (95% confidence interval [CI], -65.6 to -59.0) in EMR documentation of lifestyle counseling for patients with hypertension. Changes were smaller for indicators involving clinical actions that automatically update the EMR, such as laboratory testing, with a reduction of 10.7 percentage points (95% CI, -13.6 to -7.8) in control of cholesterol in patients with coronary heart disease and 12.1 percentage points (95% CI, -13.6 to -10.6) for thyroid-function testing in patients with hypothyroidism. There was little change in performance on the 6 quality measures for which incentives were maintained. CONCLUSIONS: Removal of financial incentives was associated with an immediate decline in performance on quality measures. In part, the decline probably reflected changes in EMR documentation, but declines on measures involving laboratory testing suggest that incentive removal also changed the care delivered
Can Food Stamps Do More to Improve Food Choices? An Economic Perspective
Food stamp recipients, like other Americans, struggle with nutrition problems associated with choice of foods, as well as amounts. This series of Economic Information Bulletins compiles evidence to help answer the question of whether the Food Stamp Program can do more to improve the food choices of participants. It examines the role of affordability and price of healthful foods in influencing food choices and the likely success of any policy targeted at changing food choices through food stamp bonuses or restrictions. It also examines other approaches to changing food choices, including nutrition education and potential strategies drawn from behavioral economics literature. Meaningful improvements in the diets of food stamp recipients will likely depend on a combination of many tactics. Measuring the effect of any policy change on food choices and health outcomes remains a challenge.Food Stamp Program, food consumption, food prices, food expenditures, nutrition education, behavioral economics, food choices, diet, health, fruits and vegetables, Food Assistance and Nutrition Research Program, FANRP, ERS, USDA, Agricultural and Food Policy, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Institutional and Behavioral Economics,
Collaborative improvement in Scottish GP clusters after the Quality and Outcomes Framework:a qualitative study
Origami constraints on the initial-conditions arrangement of dark-matter caustics and streams
In a cold-dark-matter universe, cosmological structure formation proceeds in
rough analogy to origami folding. Dark matter occupies a three-dimensional
'sheet' of free- fall observers, non-intersecting in six-dimensional
velocity-position phase space. At early times, the sheet was flat like an
origami sheet, i.e. velocities were essentially zero, but as time passes, the
sheet folds up to form cosmic structure. The present paper further illustrates
this analogy, and clarifies a Lagrangian definition of caustics and streams:
caustics are two-dimensional surfaces in this initial sheet along which it
folds, tessellating Lagrangian space into a set of three-dimensional regions,
i.e. streams. The main scientific result of the paper is that streams may be
colored by only two colors, with no two neighbouring streams (i.e. streams on
either side of a caustic surface) colored the same. The two colors correspond
to positive and negative parities of local Lagrangian volumes. This is a severe
restriction on the connectivity and therefore arrangement of streams in
Lagrangian space, since arbitrarily many colors can be necessary to color a
general arrangement of three-dimensional regions. This stream two-colorability
has consequences from graph theory, which we explain. Then, using N-body
simulations, we test how these caustics correspond in Lagrangian space to the
boundaries of haloes, filaments and walls. We also test how well outer caustics
correspond to a Zel'dovich-approximation prediction.Comment: Clarifications and slight changes to match version accepted to MNRAS.
9 pages, 5 figure
Genetic Structure and Extinction of the Woolly Mammoth, Mammuthus primigenius
SummaryThe interval since circa 50 Ka has been a period of significant species extinctions among the large mammal fauna. However, the relative roles of an increasing human presence and a synchronous series of complex environmental changes in these extinctions have yet to be fully resolved [1]. Recent analyses of fossil material from Beringia have clarified our understanding of the spatiotemporal pattern of Late Pleistocene extinctions, identifying periods of population turnover well before the last glacial maximum (LGM: circa 21 Ka) or subsequent human expansion [2–4]. To examine the role of pre-LGM population changes in shaping the genetic structure of an extinct species, we analyzed the mitochondrial DNA of woolly mammoths in western Beringia and across its range. We identify genetic signatures of a range expansion of mammoths, from eastern to western Beringia, after the last interglacial (circa 125 Ka), and then an extended period during which demographic inference indicates no population-size increase. The most marked change in diversity at this time is the loss of one of two major mitochondrial lineages
Antibiotics as part of the management of severe acute malnutrition
BACKGROUND: Severe acute malnutrition contributes to 1 million deaths among children annually. Adding routine antibiotic agents to nutritional therapy may increase recovery rates and decrease mortality among children with severe acute malnutrition treated in the community. METHODS: In this randomized, double-blind, placebo-controlled trial, we randomly assigned Malawian children, 6 to 59 months of age, with severe acute malnutrition to receive amoxicillin, cefdinir, or placebo for 7 days in addition to ready-to-use therapeutic food for the outpatient treatment of uncomplicated severe acute malnutrition. The primary outcomes were the rate of nutritional recovery and the mortality rate. RESULTS: A total of 2767 children with severe acute malnutrition were enrolled. In the amoxicillin, cefdinir, and placebo groups, 88.7%, 90.9%, and 85.1% of the children recovered, respectively (relative risk of treatment failure with placebo vs. amoxicillin, 1.32; 95% confidence interval [CI], 1.04 to 1.68; relative risk with placebo vs. cefdinir, 1.64; 95% CI, 1.27 to 2.11). The mortality rates for the three groups were 4.8%, 4.1%, and 7.4%, respectively (relative risk of death with placebo vs. amoxicillin, 1.55; 95% CI, 1.07 to 2.24; relative risk with placebo vs. cefdinir, 1.80; 95% CI, 1.22 to 2.64). Among children who recovered, the rate of weight gain was increased among those who received antibiotics. No interaction between type of severe acute malnutrition and intervention group was observed for either the rate of nutritional recovery or the mortality rate. CONCLUSIONS: The addition of antibiotics to therapeutic regimens for uncomplicated severe acute malnutrition was associated with a significant improvement in recovery and mortality rates. (Funded by the Hickey Family Foundation and others; ClinicalTrials.gov number, NCT01000298.
Research Article (New England Journal of Medicine) Antibiotics as part of the management of severe acute malnutrition
Background: Severe acute malnutrition contributes to 1 million deaths among children annually. Adding routine antibiotic agents to nutritional therapy may increase recovery rates and decrease mortality among children with severe acute malnutrition treated in the community.Methods: In this randomized, double-blind, placebo-controlled trial, we randomly assigned Malawian children, 6 to 59 months of age, with severe acute malnutrition to receive amoxicillin, cefdinir, or placebo for 7 days in addition to ready-to-use therapeutic food for the outpatient treatment of uncomplicated severe acute malnutrition. The primary outcomes were the rate of nutritional recovery and the mortality rate.Results: A total of 2767 children with severe acute malnutrition were enrolled. In the amoxicillin, cefdinir, and placebo groups, 88.7%, 90.9%, and 85.1% of the children recovered, respectively (relative risk of treatment failure with placebo vs. amoxicillin, 1.32; 95% confidence interval [CI], 1.04 to 1.68; relative risk with placebo vs. cefdinir, 1.64; 95% CI, 1.27 to 2.11). The mortality rates for the three groups were 4.8%, 4.1%, and 7.4%, respectively (relative risk of death with placebo vs. amoxicillin, 1.55; 95% CI, 1.07 to 2.24; relative risk with placebo vs. cefdinir, 1.80; 95% CI, 1.22 to 2.64). Among children who recovered, the rate of weight gain was increased among those who received antibiotics. No interaction between type of severe acute malnutrition and intervention group was observed for either the rate of nutritional recovery or the mortality rate.Conclusions: The addition of antibiotics to therapeutic regimens for uncomplicated severe acute malnutrition was associated with a significant improvement in recovery and mortality rates. (Funded by the Hickey Family Foundation and others; ClinicalTrials.gov number, NCT01000298.
Inhibition of Defocus-Induced Myopia in Chickens
Woods, J., Guthrie, S. E., Keir, N., Dillehay, S., Tyson, M., Griffin, R., … Irving, E. (2013). Inhibition of Defocus-Induced Myopia in Chickens. Investigative Opthalmology & Visual Science, 54(4), 2662. https://doi.org/10.1167/iovs.12-10742Purpose.: To determine the effect of wearing a lens with a unique peripheral optical design on the development and progression of defocus-induced myopia in newly hatched chickens.Methods.: Eighty-five newly hatched chickens underwent bilateral retinoscopy and A-scan ultrasound to determine their refractive error and axial length. They were randomly divided into Control and two Test groups, in which each chicken was fitted with a goggle-lens over the right eye, with the left eye remaining untreated. The Control group wore a lens of power −10.00 diopters (D) of standard spherical optical design. The two Test lenses both had a central optical power −10.00 D, but used different peripheral myopia progression control (MPC) designs. For all groups, retinoscopy was repeated on days 3, 7, 10, and 14; ultrasound was repeated on day 14.
Results.: On day 0 there was no statistical difference in refractive error (mean +6.92 D) or axial length (mean 8.06 mm) between Test and Control groups or treated and untreated eyes (all P > 0.05). At day 14, 37 (43.5%) of 85 chickens had not experienced goggle detachment and were included in the final analyses. In this cohort there was a significant refractive difference between the treated eyes of the Control group (n = 17) and those of Test 1 (n = 14) and Test 2 (n = 6) groups (both P < 0.01): Control −4.65 ± 2.11 D, Test 1 +4.57 ± 3.11 D, Test 2 +1.08 ± 1.24 D (mean ± SEM). There was also a significant axial length difference (both P < 0.01): Control 10.55 ± 0.36 mm, Test 1 9.99 ± 0.14 mm, Test 2 10.17 ± 0.18 mm.
Conclusions.: Use of these unique MPC lens designs over 14 days caused a significant reduction in the development of defocus-induced myopia in chickens; the degree of reduction appeared to be design specific
Early deletion of neuromeres in Wnt-1 -/- mutant mice: Evaluation by morphological and molecular markers
The Wnt-1 gene is required for the development of midbrain and cerebellum; previous work showed that knockout of Wnt-1 causes the loss of most molecular markers of these structures in early embryos and deletion of these structures by birth. However, neither the extent of early neuronal defects nor any possible alterations in structures adjacent to presumptive midbrain and cerebellum were examined. By using a neuron-specific antibody and fluorescent axon tracers, we show that central and peripheral neuronal development are altered in mutants during initial axonogenesis on embryonic day 9.5. The absence of neuronal landmarks, including oculomotor and trochlear nerves and cerebellar plate, suggests that both mesencephalon and rhombomere 1 (r1) are deleted, with the remaining neural tube fused to form a new border between the caudalmost portion of the prosencephalon (prosomere 1, or p1) and r2. Central axons accurately traverse this novel border by forming normal longitudinal tracts into the rhombencephalon, implying that the cues that direct these axons are aligned across neuromeres and are not affected by the deletion. The presence of intact p1 and r2 is further supported by the retention of markers for these two neuromeres, including a marker of p1, the Sim-2 gene, and an r2-specific lacZ transgene in mutant embryos. In addition, alterations in the Sim-2 expression domain in ventral prosencephalon, rostral to p1, provide novel evidence for Wnt-1 function in this region. © 1996 Wiley-Liss, Inc.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/50070/1/7_ftp.pd
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