Methodological issues for determining intervals of subsequent cancer screening.
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ABSTRACT:
SUBMITTER: Bae JM
PROVIDER: S-EPMC4153009 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:INTRODUCTION:Many U.S. women continue to be screened annually for cervical cancer, despite current guidelines that recommend 3- or 5-year screening intervals depending on screening modality and patient age. METHODS:Data from 2012 and 2015 web-based surveys of U.S. adults were analyzed in 2017 to investigate U.S. women's cervical cancer screening preferences. The study was limited to women aged ?18 years without a hysterectomy or cervical cancer diagnosis (2012 n=1,380, 2015 n=1,339). RESULTS:Women's preference for 3- or 5-year screening intervals doubled during the study period (2012: 31.2%, 2015: 64.2%, p<0.001). The most preferred screening options in 2015 were co-testing every 3 years with the Pap and human papillomavirus tests (34.0%) and annual Pap testing (30.4%)-neither of which were recommended at that time or currently. Use of 3- and 5-year Pap testing intervals increased during the study period (2012: 6.9%, 2015: 12.9%, p<0.001), whereas annual Pap testing declined (2012: 48.5%, 2015: 35.6%, p<0.001). Among women who were regularly screened and preferred 3- or 5-year screening intervals, the minority reported screening practices that matched this preference (2012: 24.1%, 2015: 29.3%, p=0.71). CONCLUSIONS:Women's preference for longer cervical cancer screening intervals has increased rapidly and outpaced utilization. At the same time, many women continue to be screened annually. Expanding appropriate screening may require increasing women's and providers' comfort with screening recommendations.
| S-EPMC6102077 | biostudies-literature
Project description:IntroductionAntipsychotic drug is the mainstay of treatment for schizophrenia, and there are large inter-individual differences in clinical response and side effects. Pharmacogenetics provides a valuable tool to fulfill the promise of personalized medicine by tailoring treatment based on one's genetic markers.Areas coveredThis article reviews the recent progress in pharmacogenetic research of antipsychotic drugs since 2010, focusing on two areas: antipsychotic-induced weight gain and clozapine-induced agranulocytosis. The article also provides discussion on the important methodological issues in this area of research. The specific aim of this article is to provide the reader with up-to-date evidence in pharmacogenetic research, and for them to gain familiarity to the issues and challenges facing the field.Expert opinionPharmacogenetic studies of antipsychotic drugs are promising despite many challenges. Recent advances as reviewed in this article push the field closer to routine clinical utilization of pharmacogenetic testing. Progress in genomic technology and bioinformatics, larger sample sizes, better phenotype characterization, and careful consideration of study design issues will help to elevate antipsychotic pharmacogenetics to its next level.
| S-EPMC3547146 | biostudies-literature
Project description:BackgroundTransthyretin-related cardiac amyloidosis (TTR-CA) is thought to be particularly common in specific at-risk conditions, including aortic stenosis (AS), heart failure with preserved ejection fraction (HFpEF), carpal tunnel syndrome (CTS) and left ventricular hypertrophy or hypertrophic cardiomyopathy (LVH/HCM).MethodsWe performed a systematic revision of the literature, including only prospective studies performing TTR-CA screening with bone scintigraphy in the above-mentioned conditions. Assessment of other forms of CA was also evaluated. For selected items, pooled estimates of proportions or means were obtained using a meta-analytic approach.ResultsNine studies (3 AS, 2 HFpEF, 2 CTS and 2 LVH/HCM) accounting for 1375 screened patients were included. One hundred fifty-six (11.3%) TTR-CA patients were identified (11.4% in AS, 14.8% in HFpEF, 2.6% in CTS and 12.9% in LVH/HCM). Exclusion of other forms of CA and use of genetic testing was overall puzzled. Age at TTR-CA recognition was significantly older than that of the overall screened population in AS (86 vs. 83 years, p = .04), LVH/HCM (75 vs. 63, p < .01) and CTS (82 vs. 71), but not in HFpEF (83 vs. 79, p = .35). In terms of comorbidities, hypertension, diabetes and atrial fibrillation were highly prevalent in TTR-CA-diagnosed patients, as well as in those with an implanted pacemaker.ConclusionsScreening with bone scintigraphy found an 11-15% TTR-CA prevalence in patients with AS, HFpEF and LVH/HCM. AS and HFpEF patients were typically older than 80 years at TTR-CA diagnosis and frequently accompanied by comorbidities. Several studies showed limitations in the application of recommended TTR-CA diagnostic algorithm, which should be addressed in future prospective studies.
| S-EPMC9286629 | biostudies-literature
Project description:Reference methods for antifungal susceptibility testing of yeasts have been developed by the Clinical and Laboratory Standards Institute (CLSI) and the European Committee on Antibiotic Susceptibility Testing (EUCAST). These methods are intended to test the main pathogenic yeasts that cause invasive infections, namely Candida spp. and Cryptococcusneoformans, while testing other yeast species introduces several additional problems in standardization not addressed by these reference procedures. As a consequence, a number of procedures have been employed in the literature to test the antifungal susceptibility of Malassezia pachydermatis. This has resulted in conflicting results. The aim of the present study is to review the procedures and the technical parameters (growth media, inoculum preparation, temperature and length of incubation, method of reading) employed for susceptibility testing of M. pachydermatis, and when possible, to propose recommendations for or against their use. Such information may be useful for the future development of a reference assay.
| S-EPMC5715951 | biostudies-literature
Project description:Objectification occurs when a person is perceived and/or treated like an object. With the present work, we overview the available measures of objectification and present a series of studies aimed at investigating the validity of the task of inverted body recognition proposed by Bernard and colleagues (2012), which might potentially be a useful cognitive measure of objectification. We conducted three studies. Study 1 (N = 101) is a direct replication of Bernard et al.'s study: participants were presented with the same photos of sexualized male and female targets used in the original research. Study 2a (N = 100) is a conceptual replication: we used different images of scantily dressed male and female models. Finally, in Study 2b (N = 100), we investigated a boundary condition by presenting to participants photos of the same models as in Study 2a, but fully dressed and non-sexualized. Using mixed-effects models for completely-crossed classified data structures, we investigated the relationship between the inversion effect and the stimulus' asymmetry, sexualization and attractiveness, and the perceivers' self-objectification, sexism, and automatic woman-human association. Study 1 replicated the original results, showing a stronger inversion effect for male photos. However, no difference between male and female stimuli emerged in either Study 2a or 2b. Moreover, the impact of the other variables on the inversion effect was highly unstable across the studies. These aspects together indicate that the inversion effect depends on the specific set of stimuli and limits the generalizability of results collected using this method.
| S-EPMC7031944 | biostudies-literature
Project description:Laboratory-based animal research has revealed a number of exposures with multigenerational effects-ones that affect the children and grandchildren of those directly exposed. An important task for epidemiology is to investigate these relationships in human populations. Without the relative control achieved in laboratory settings, however, population-based studies of multigenerational associations have had to use a broader range of study designs. Current strategies to obtain multigenerational data include exploiting birth registries and existing cohort studies, ascertaining exposures within them, and measuring outcomes across multiple generations. In this paper, we describe the methodological challenges inherent to multigenerational studies in human populations. After outlining standard taxonomy to facilitate discussion of study designs and target exposure associations, we highlight the methodological issues, focusing on the interplay between study design, analysis strategy, and the fact that outcomes may be related to family size. In a simulation study, we show that different multigenerational designs lead to estimates of different exposure associations with distinct scientific interpretations. Nevertheless, target associations can be recovered by incorporating (possibly) auxiliary information, and we provide insights into choosing an appropriate target association. Finally, we identify areas requiring further methodological development.
| S-EPMC7822644 | biostudies-literature
Project description:PAHSAs are anti-diabetic and anti-inflammatory lipids. Syed et al. identify numerous experimental differences that likely account for the failure of Pflimlin et al. to observe PAHSA beneficial effects. The differences include different HFDs resulting in minimal/no glucose intolerance, different assay conditions, an LC-MS protocol that was not validated, and use of olive oil, a bioactive nutrient that improves glucose tolerance, as a vehicle.
| S-EPMC6542592 | biostudies-literature
Project description:Current U.S. cervical cancer screening guidelines recommend a 3- or 5-year screening interval depending on age and screening modality. However, many women continue to be screened annually. The purpose of this study is to investigate U.S. women's self-reported frequency of cervical cancer screening, acceptance of an extended screening interval (once every 3-5 years), and preferred screening options.Data from a 2012 web-based survey of U.S. women aged ?18 years who had not undergone a hysterectomy or been diagnosed with cervical cancer (N=1,380) were analyzed in 2014. Logistic regression models of extended screening interval use, acceptance, and preference were developed.Annual Pap testing was the most widely used (48.5%), accepted (61.0%), and preferred (51.1%) screening option. More than one third of respondents (34.4%) indicated that an extended screening interval would be acceptable, but only 6.3% reported that they were currently screened on an extended interval. Women who preferred an extended screening interval (32.9% of those willing to accept regular screening) were more likely to report no primary care visits during the last 12 months (AOR=2.05, p<0.003), no history of abnormal Pap test results (AOR=1.71, p=0.013), and that their last Pap test was performed by an internist/family practitioner rather than an obstetrician-gynecologist (AOR=2.03, p<0.001).U.S. women's acceptance of and preference for an extended cervical cancer screening interval appears to be more widespread than utilization. Strategies to educate women about the reasoning behind recommendations for less-than-annual testing and to foster informed preferences should be devised and evaluated.
| S-EPMC4656074 | biostudies-literature
Project description:BackgroundThe delivery of optimal medical care to children is dependent on the availability of child relevant research. Our objectives were to: i) systematically review and describe how children are handled in reviews of drug interventions published in the Cochrane Database of Systematic Reviews (CDSR); and ii) determine when effect sizes for the same drug interventions differ between children and adults.MethodsWe systematically identified all of the reviews relevant to child health in the CDSR 2002, Issue 4. Reviews were included if they investigated the efficacy or effectiveness of a drug intervention for a condition that occurs in both children and adults. Information was extracted on review characteristics including study methods, results, and conclusions.ResultsFrom 1496 systematic reviews, 408 (27%) were identified as relevant to both adult and child health; 52% (213) of these included data from children. No significant differences were found in effect sizes between adults and children for any of the drug interventions or conditions investigated. However, all of the comparisons lacked the power to detect a clinically significant difference and wide confidence intervals suggest important differences cannot be excluded. A large amount of data was unavailable due to inadequate reporting at the trial and systematic review level.ConclusionOverall, the findings of this study indicate there is a paucity of child-relevant and specific evidence generated from evidence syntheses of drug interventions. The results indicate a need for a higher standard of reporting for participant populations in studies of drug interventions.
| S-EPMC1261269 | biostudies-literature
Project description:There is conflicting information on the relationship between diet and dementia. The purposes of this pilot study were twofold. First, to use publicly available data regarding food consumption (United Kingdom Family Food), dementia, risk and demographic factors to find relationships between the consumption of various foods to dementia prevalence. The second purpose was to identify elements of study design that had important effects on the results. Multiple analyses were performed on different data sets derived from the existing data. Statistical testing began with univariate correlation analyses corrected for multiple testing followed by global tests for significance. Subsequently, a number of multivariate techniques were applied including stepwise linear regression, cluster regression, regularized regression, and principal components analysis. Permutation tests and simulations highlighted the strength and weakness of each technique. The univariate analyses demonstrated that the consumption of certain foods was highly associated with the prevalence of dementia. However, because of the complexity of the data set and the high degree of correlation between variables, different multivariate analyses yielded different results, explainable by the correlations. Some factors identified as having potential associations were the consumption of rice, sugar, fruit, potatoes, meat products and fish. However, within a given dietary category there were often a number of different elements with different relations to dementia. This pilot study demonstrates some critical elements for a future study: (1) dietary factors must be very narrowly defined, (2) large numbers of cases are needed to support multivariable analyses. (3) Multiple statistical methods along with simulations must be used to confirm results.
| S-EPMC9298542 | biostudies-literature