697 research outputs found

    Hypertension among Oral Contraceptive Users in El Paso, Texas

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    On the U.S.-Mexico border, residents frequently cross into Mexico to obtain medications or medical care. We previously reported relatively high prevalence of hypertension among Latina oral contraceptive users in El Paso, particularly those obtaining pills over the counter (OTC) in Mexico. Here, we examine factors associated with having hypertension among 411 OTC users and 399 clinic users. We also assess hypertension awareness and interest in using blood pressure kiosks. Women age 35 to 44 and who had BMI ≄ 30 kg/m2 had higher odds of having hypertension. 59% of hypertensive women had unrecognized hypertension, and 77% of all participants would use a blood pressure kiosk; there were no significant differences between clinic and OTC users. Alternative approaches to increase access to health screenings are needed in this setting, where OTC pill use among women with unrecognized hypertension confers unique health risksPopulation Research Cente

    Symposium on Bubbles

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    On Value Maximization and Alternative Objectives of the Firm

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    The recent literature on firm behavior has been characterized by two contrasting strands of analysis: on the one hand, there is the literature attempting to extend the conventional maxims of profit maximization of competitive firms from the familiar static models to dynamic contexts and into situations of uncertainty. These analyses argue that firms should maximize their stock market value and explore the implications of this for firm behavior. On the other hand, there is the vast and growing "managerial" literature, in which other objectives, such as "satisficing," "sales maximizing," and "maximization of the manager's utility functions" are postulated. The second group of analyses criticize the first as being unrealistic, while the first argues that it provides the best "first approximation" to firm behavior: if firms did not maximize their stock market value, or deviated far from value maximization, someone would attempt to take them over, change the course of action of the firm, and make a pure capital gain. This paper presents a unified framework for analyzing firm behavior which can be used to reconcile these divergent views

    Status of the tilefish, Lopholatilus chamaeleonticeps, fishery off South Carolina and Georgia and recommendations for management

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    We used a sex- and age-structured model and CPUE data from commercial and research vessels to assess the current status of the tilefish, Loplwlatilus chamaeleonticeps, substock off South Carolina and Georgia. Based on commercial CPUE data and assumed natural mortality (M) rates of 0.10-0.25, we estimated that adult population density prior to fishing ranged from 603 to 950 per km2 and stock biomass ranged from 1,130 to 1,570 tonnes (t). Our estimates of the recommended fishing mortality rate ranged from 0.10 eM - 0.10) to 0.48 (M = 0.25), resulting in sustainable yields of 40 (M - 0.10) to 82 t eM = 0.25) per year. We obtained higher estimates of virgin population density (883-1,710 per km~ when research CPUE data were used. Sustained yield estimates also were higher, ranging from 55 (M - 0.10) to 148 t (M = 0.25) per year. Average estimates of recommended yield from commercial and research CPUE data were 58 and 95 t, respectively. Observed yields in the developing fishery exceeded 100 t in 1981-84 and in 1986; however, current observations indicate that fishing effort has declined to a low level in response to reduced catches. Based on the assumption that commercial CPUE data better reflect population trends, we recommend that the annual harvest not exceed about 50 t, which should result in a stock biomass of about 400-800 t. Apparent limitations on sustainable yield from the fishery probably can be attributed to the long lifespan, slow growth rate, and sedentary nature of tilefish

    Contraindications of progestin-only oral contraceptive pills among reproductive-aged women

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    BACKGROUND: Progestin-only oral contraceptive pills (POPs) have fewer contraindications to use compared to combined pills. However, the overall prevalence of contraindications to POPs among reproductive aged women has not been assessed. STUDY DESIGN: We collected information on contraindications to POPs in two studies : 1) the Self-Screening Study, a sample of 1,267 reproductive aged women in the general population in El Paso, Texas and 2) the Prospective Study of Oral Contraceptive (OC) Users, a sample of current OC users who obtained their pills in El Paso clinics (n=532) or over the counter (OTC) in Mexican pharmacies (n=514). In the Self-Screening Study, we also compared women’s self-assessment of contraindications using a checklist to a clinicain’s evaluation. RESULTS: Only 1.6% of women in the Self-Screening Study were identified as having at least one contraindication to POPs. The sensitivity of the checklist for identifying women with at least one contraindication was 75.0% (95% CI: 50.6-90.4%), and the specificity was 99.4% (95% CI: 98.8-99.7%). In total, 0.6% of women in the Prospective Study of OC Users reported having any contraindication to POPs. There were no significant differences between clinic and OTC users. CONCLUSION: The prevalence of contraindications to POPs was very low in these samples. POPs may be the best choice for the first OTC oral contraceptive in the US.The Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD047816).http://www.journals.elsevier.com/contraception

    Dopamine D2 receptor gene variants and response to rasagiline in early Parkinson's disease:a pharmacogenetic study

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    The treatment of early Parkinson's disease with dopaminergic agents remains the mainstay of symptomatic therapy for this incurable neurodegenerative disorder. However, clinical responses to dopaminergic drugs vary substantially from person to person due to individual-, drug- and disease-related factors that may in part be genetically determined. Using clinical data and DNA samples ascertained through the largest placebo-controlled clinical trial of the monoamine oxidase B inhibitor, rasagiline (ClinicalTrials.gov number, NCT00256204), we examined how polymorphisms in candidate genes associate with the clinical response to rasagiline in early Parkinson's disease. Variants in genes that express proteins involved in the pharmacokinetics and pharmacodynamics of rasagiline, and genes previously associated with the risk to develop Parkinson's disease were genotyped. The LifeTechnologies OpenArray NT genotyping platform and polymerase chain reaction-based methods were used to analyse 204 single nucleotide polymorphisms and five variable number tandem repeats from 30 candidate genes in 692 available DNA samples from this clinical trial. The peak symptomatic response to rasagiline, the rate of symptom progression, and their relation to genetic variation were examined controlling for placebo effects using general linear and mixed effects models, respectively. Single nucleotide polymorphisms, rs2283265 and rs1076560, in the dopamine D2 receptor gene (DRD2) were found to be significantly associated with a favourable peak response to rasagiline at 12 weeks in early Parkinson's disease after controlling for multiple testing. From a linear regression, the betas were 2.5 and 2.38, respectively, with false discovery rate-corrected P-values of 0.032. These polymorphisms were in high linkage disequilibrium with each other (r(2) = 0.96) meaning that the same clinical response signal was identified by each of them. No polymorphisms were associated with slowing the rate of worsening in Parkinson symptoms from Weeks 12 to 36 after correction for multiple testing. This is the largest and most comprehensive pharmacogenetics study to date examining clinical response to an anti-parkinsonian drug and the first to be conducted in patients with early stage Parkinson's disease receiving monotherapy. The results indicate a clinically meaningful benefit to rasagiline in terms of the magnitude of improvement in parkinsonian symptoms for those with the favourable response genotypes. Future work is needed to elucidate the specific mechanisms through which these DRD2 variants operate in modulating the function of the nigrostriatal dopaminergic system
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