Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Segmented regression"”.
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Structural Change in the Retail Demand for Beef, Chicken and Pork: An Application of Gradual Switching Regression (Segmented Regression, Varying Parameters)
… and pork. In particular, two gradual switching regression (GSR) demand models--one which allows a permanent change in income and own-price elasticities and one which allows a permanent change in income, own-price and selected cross-price elasticities--are found to be superior to a fixed …
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Implementation of an Outpatient Antimicrobial Stewardship Program to Reduce Fluoroquinolone Overprescribing at a Veterans Affairs Academic Medical Center
… and after the intervention time period using segmented regression time series analysis including a non-intervention comparator clinic. Results: In the non-intervention clinics, rates of fluoroquinolone orders increased from 3.9±5.2 orders per week per 1,000 patient visits in the …
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Long-term vegetation change in the Cape of Good Hope section of Table Mountain National Park, in response to climate, fire and land use
… assessed over the last 100 years using linear regression, segmented regression and GIS analyses. Seventy eight repeat photographs were taken at stratified points set out across the reserve and changes in total vegetation cover and the cover of major growth forms (broad leaved shrubs, proteoids, …
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Time series analysis for evaluation of antimicrobial stewardship interventions
… studies when compared to the results of a segmented regression re-analysis of their data. A time series method was used in 60 (56%) studies and the most commonly used analysis methods were segmented regression (70%) and Autoregressive Integrated Moving Average (ARIMA) (12%). There is no …
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Impact of Cyclin-Dependent Kinase 4 and 6 Inhibitors on Chemotherapy Utilization and Overall Survival in Women with HR+/HER2– Metastatic Breast Cancer in the United States
… in the first, second, and third lines. Segmented regression models, adjusted for autocorrelation over time, were fitted to estimate trends before and after the availability of CDK4/6 inhibitors in the first quarter of 2015. Results: Of the 3,244 eligible women (median age at diagnosis: …
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More Qualifications and Less Dropout? From Compulsory Schooling to Vocational Education in Italy
… score matching, counterfactual time series, segmented regression, region fixed effect and individual multilevel cross-classified logistic analyses are used. The results are framed in the theoretical debates about education: its roles, its expansion, its contribute to (in)equality and its …
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Primary care antimicrobial stewardship: Impact on prescribing and resistance
… interventions in community settings. (2) Segmented regression analysis of time-series data to examine the impact of the Tayside intervention on population antimicrobial prescribing, and on outcomes (resistance, length of stay, and 30-day mortality) in people admitted to hospital with …
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Hydrologic and hydrochemical processes on mine spoil fills
… conformed to an exponential decay and linear segmented regression model. Maximum SC values (1108 ± 161 µS cm⁻¹) occurred initially during leaching, exponentially decayed, then exhibited linear SC releases (276 ± 25 µS cm⁻¹) that were elevated relative to natural background levels at the end of …
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Modeling maximum size-density relationships of loblolly pine (Pinus taeda L.) plantations
… generally accepted stages of stand development. Segmented regression is presented as a statistical and less subjective method to determine what observations are within various stages of stand development. Estimates of D and trees per acre (N) where MSDR dynamic thinning lines begin and end on the …
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The Monitoring of Linear Profiles and the Inertial Properties of Control Charts
… bivariate observations for which a simple linear regression model is appropriate, a situation common in calibration applications. Using a simulation study, the researcher compares the performance of some of the recommended approaches used to assess the stability of the process. Also in this …
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Influence of site, clone, age, and growth rate on wood properties of three Populus X Euramericana clones
… exhibited a different radial pattern. Based on segmented regression, a quadratic model with a plateau proved to be useful for estimating the demarcation between juvenile and mature anatomical characteristics. The ages of maturation were not the same for all properties; however, the order of …
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Thermal inactivation of Salmonella and Escherichia coli O157:H7 in heat treated, recycled used cooking oil
… was utilized to generate thermal death curves. Segmented regression was performed using the Proc NLIN function of SAS (v 9.4) and z-values were calculated using linear regression (SAS v 9.4). Non-linear death curves were observed for all pathogen and temperature combinations. This response to …
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Market Response to Food and Drug Administration's Safety Warnings: a Case Study Using an Interrupted Time Series Analysis of the Medicare Database for 2006-2008
Objectives: To evaluate the impact of a safety warning on the utilization rates of thiazolidinedione oral anti-diabetes medication using an interrupted time series analysis. Methods: We extracted data from a five percent national sample of Medicare Part D beneficiaries for the periods between …
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CUMULATIVE ANTICHOLINERGIC BURDEN AND ASSOCIATED OUTCOMES AMONG OLDER ADULTS WITH ALZHEIMER’S DISEASE
… and need factors. A multivariable logistic regression model was used to evaluate the predictors of high-moderate vs. low-no cumulative anticholinergic burden for objective one. A multinomial logistic regression model was also used to determine the factors associated with patients having …