case-control study Case-ControlStudy （病例对照研究）1.BasicConcepts Astudystartswiththeidentificationofpersonswiththediseaseofinterestandacontrolgroupofpersonswithoutthedisease,tomeasuretheassociationbetweentheexposureandthediseasebycomparingthediseasedandnon-diseasedwithregardedtohowfrequentlytheexposurepresent.Exposure ...
Case-ControlStudy （病例对照研究）1.BasicConcepts Astudystartswiththeidentificationofpersonswiththediseaseofinterestandacontrolgroupofpersonswithoutthedisease,tomeasuretheassociationbetweentheexposureandthediseasebycomparingthediseasedandnon-diseasedwithregardedtohowfrequentlytheexposurepresent.Exposure Studysubjectscontact...
A sample size formula for case-control studies with an independent variable that is continuousA sample size formula for case-control studies with an independent variable that is continuous - Controlled Clinical Trialsdoi:10.1016/0197-2456(92)90129-NBruce Thompson...
We derive several formulae for the sample size required for a study designed using the self-controlled case series method without age effects. We investigate these formulae by simulation, and identify one based on the signed root likelihood ratio statistic which performs well. We extend this metho...
Nested case-control study in which the controls are selected at each time when a case occurs (incidence density sampling) Example of a Case-Control study ? Hypothesis: xx baby formula contaminated with Melamine, as opposed to other baby formula, is a cause of kidney stones in infants 100 ...
Additionally, \({k}_{1}\) and \({k}_{2}\) are the numbers of columns in \({{{\bf{W}}}_{1}\) and \({{{\bf{W}}}_{2}\), respectively (\(k={k}_{1}+{k}_{2}\)), and they can be adjusted to control the dominance of the reference data on the model. The last ...
Quality control was conducted to correct obvious errors in the data set. Questionnaire data were analyzed using IBM SPSS Statistics for Windows, version 21.0 (SPSS Inc., Chicago, IL, USA). Due to categorical nature of data, we presented our result in proportion and percentage. Sample size was...
The sample size for the study was estimated with use of Cochrane’s formula for cross-sectional studies: n = z2p(1 − p)/e2, where n is the estimated sample size, z is the reliability coefficient (1.96 at the 95% confidence level), p is the prevalence (0.282% as the prevalence ...
Study controls, intended to be representative of the national demography, were selected randomly from the New Zealand population. An eligible control had to be free of symptoms of diarrhoea or any other gastrointestinal disease at the time of interview, and in the two weeks prior to the interview...
This paper delves into the nuanced dynamics influencing the outcomes of risk assessment (RA) in scientific research projects (SRPs), employing the Naive Bayes algorithm. The methodology involves the selection of diverse SRPs cases, gathering data encompa