نتایج جستجو برای: bias epidemiology
تعداد نتایج: 212315 فیلتر نتایج به سال:
while ignoring income distribution and estimating aggregate demand generally leads to aggregation bias and thus, does not reflect households’ demand properly, yet aggregation bias is rarely considered in empirical demand studies and simply is ignored in most cases. the objective of the present study is to estimate aggregation bias in households’ demand for various types of meats and to evaluate...
Objectives A recent method that modifies the intrusive memories is cognitive bias modification. This study aimed to investigate and compare the three none-attendance therapies of standardized cognitive bias modification, cognitive bias modification based self-generation and cognitive-behavior training. Methods According to inclusion and exclusion criteria, a total of 51 participants were selec...
Uncontrolled confounding in observational studies gives rise to biased effect estimates. Sensitivity analysis techniques can be useful in assessing the magnitude of these biases. In this paper, we use the potential outcomes framework to derive a general class of sensitivity-analysis formulas for outcomes, treatments, and measured and unmeasured confounding variables that may be categorical or c...
In mainland China, most avian influenza A(H7N9) cases in the spring of 2013 were reported through the pneumonia of unknown etiology (PUE) surveillance system. To understand the role of possible underreporting and surveillance bias in assessing the epidemiology of subtype H7N9 cases and the effect of live-poultry market closures, we examined all PUE cases reported from 2004 through May 3, 2013. ...
Comparing the mortality characteristics of different cohorts is an essential process in the life insurance industry. Pseudodisease, lead-time bias, and length bias, which are critical to determining the value of cancer screening, have close analogues in life insurance company management, including the temporal impact of underwriting. Ratios of all-cause mortality rates for cancer cohorts relati...
Estimating the phenotypic correlations between complex traits and diseases based on their genome-wide association summary statistics has been a useful technique in genetic epidemiology statistical genetics inference. Two state-of-the-art strategies, Z-score correlation across null-effect single nucleotide polymorphisms (SNPs) LD score regression intercept, were widely applied to estimate correl...
while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...
Attending college seems to be a profitable and affordable investment in the US. Nevertheless, a number of academically talented young people still hesitate to attend college. This puzzle motivates this paper to test for whether college education is a risky investment. To measure the riskiness of college attendance, I estimate the risk differential in earnings between college attendees and high ...
Background and Objectives: One of the relatively modern branches in the knowledge of epidemiology, which despite being very important, very few articles have been published about it so far, is the branch of educational epidemiology. Therefore, the purpose of this study is to introduce the branch of educational epidemiology. Materials and Methods: This study is a comprehensive review study in w...
Abstract Introduction: Many of the students chr('39')educational problems, including academic failure and maladaptive behaviors, stem from exam anxiety caused by studentschr('39') cognitive bias. Cognitive bias modification can reduce attention biases students to be negative. Therefore, the purpose of the present study was to investigate the effectiveness of cognitive bias modification interven...
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