Asymptotic sample size calculation for inference on negative and positive predictive values in case-control designs.Frank Schaarschmidt
Summary: When designing a case-control study to investigate differences in microbial composition, it is fundamental to assess the sample sizes needed to detect an hypothesized difference with sufficient statistical power. Our application includes power calculation for (i) a recoded version of the two-...
Also, as a ‘proof of principle’ calculation, we perform power and sample size calculations for all genes within 100 kb of the PSORS1 locus (chromosome 6) for a previously published association study of psoriasis. Results of our regression analysis indicate that four highly ...
control sample size studiescase series sample size calculationldquorule of threes”sample size calculations for dichotomous variables BL Strom - John Wiley & Sons, Ltd 被引量: 66发表: 2007年 A new self-controlled case series method for analyzing spontaneous reports of adverse events after vaccination...
The emergence of single-cell omics sequencing technology allows us to study cellular heterogeneity and complexity1. In the field of single-cell epigenomics, single-cell chromatin accessibility sequencing (scCAS) can measure the open chromatin status of individual cells2, discover epigenomic heterogeneity...
For power calculation, we considered the given sample size, disease prevalence of 11.4% in Iran41, the minor allele frequency of 0.34, the average odds ratio of 1.2 for three SNPs of interest obtained from previous studies, and the significance level of 0.01. After relevant quality control of...
(3*sigma).Two points together are more than mean +(2*sigma), but less than mean + (3*sigma).Seven points together are on one side of the mean.All points within the control limits.Explanation: Three-sigma limits is a statistical calculation where the data are within three standard ...
The aim of this study was to measure the amniotic fluid (AF) levels of EDCs and metals as well as the receptor transactivities induced by AF and investigate the possible link between prenatal exposure to EDCs and heavy metals and ASD risk. Methods In this case-control study, we included ...
study. Control samples are accidents who do not have the specific outcome being studied. In this study, ‘AV accident case sample’ consists of AV accidents within each stratum, and the ‘HDV accident control samples’ consist of the HDV accidents within the same stratum. The method begins by...
First, the case data used is limited and the sample size is relatively small, which may affect the generalization ability of the research results. Second, the factors concerned may not be comprehensive, and other factors that may affect RA, such as market changes and policies and regulations, ...