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Patricia Butler

Publications and source records attributed to Patricia Butler.

2 recordsLinked to original sources

The impact of preclinical preceptorships on learning the fundamentals of clinical medicine and physical diagnosis skills.

PURPOSE: To learn whether preclinical primary care preceptorships resulted in demonstrable clinical performance benefits to medical students. METHOD: This was a retrospective cohort study of 267 medical students who elected and 310 students who did not elect to take a four-week primary care preceptorship following the first year of training at the University of Texas Medical School at Houston in 2001-2003. Outcome variables were the students' performances on a written examination testing their integration of basic science and fundamentals of clinical medicine and performances on a comprehensive objective structured clinical examination (OSCE). After adjusting for factors that might have explained differences in the students' performances, logistic regression models were used to assess the association of the outcome variables with participation in a preceptorship. RESULTS: Students who participated in any one of the preceptorships performed better on the OSCE and on the fundamentals of clinical medicine examination than students who did not participate (p < .01). Students who participated in the family medicine or pediatric preceptorship scored higher on an OSCE (odds ratio [OR], 1.67; 95% confidence interval [CI], 1.01-2.78 and OR, 2.26; 95% CI, 1.18-4.36, respectively) than those students who did not participate in a preceptorship. Students who participated in the internal medicine preceptorship scored higher on the fundamentals of clinical medicine examination (OR, 3.18; 95% CI, 1.92-5.23). CONCLUSIONS: Preliminary evidence indicates that a short preclinical primary care preceptorship can help medical students to consolidate and integrate the fundamental cognitive and clinical skills they will apply during the clinical years of medical training.

Adult↗

Evaluating colloidal phosphorus delivery to surface waters from diffuse agricultural sources.

Colloid-facilitated phosphorus (P) delivery from agricultural soils in different hydrological pathways was investigated using a series of laboratory and field experiments. A soil colloidal P test was developed that yields information on the propensity of different soils to release P attached to soil colloids. The relationship between turbidity of soil extracts and total phosphorus (TP) was significant (r2 = 0.996, p < 0.001) across a range of agricultural soils, and a strong positive relationship (r2 = 0.86, p < 0.001) was found between "colloidal P" (H2O-CaCl2 extracts) and turbidity. Linear regression of the proportion of fine clay (<2 microm) for each soil type evaluated against the (H2O-CaCl2) colloidal P fraction gave a weak but positive relationship (r2 = 0.38, p = 0.082). The relative contribution of different particle-size fractions in transporting P in agricultural runoff from grassland soils was evaluated using a randomized plot experiment. A significant difference (p = 0.05) in both TP and reactive phosphorus (RP) in subsurface flow was recorded for different particle-size fractions, with most TP transferred either in association with the 2-microm fraction or with the 0.001-microm or smaller fractions. Total P concentrations in runoff were higher from plots receiving P amendments compared with the zero-P plots; however, these differences were only significant for the >0.45-microm particle-size fractions (p = 0.05), and may be evidence of surface applications of organic and inorganic fertilizers being transferred through the soil either as intact organic colloids or attached to mineral particles. Our results highlight the potential for drainage water to mobilize colloids and associated P during rainfall events.

Agriculture↗