Comments on Statistical Issues in November 2014
نویسندگان
چکیده
منابع مشابه
Comments on Statistical Issues in November 2015
purpose of this section is to show how many observations are actually analyzed in multivariate analyses, such as multiple linear regression analysis or multiple logistic regression analysis, when there are different numbers of missing values in each explanatory variable. Let’s perform a multiple linear regression using the following hypothetical data (Table 1). In this data, explanatory variabl...
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The analysis results of KNHANES data are usually presented as weighted mean±standard error of mean (SEM) or weighted proportion (SE). The reason for providing standard error instead of standard deviation is attributed to the fact that standard deviation only describes variation of sample data. On the other hand, standard error provides the precision of estimate (weighted mean/weight proportion)...
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As they described in the background, this study aimed to (1) evaluate the relationship between generalized joint laxity (GJL) and lumbar disc herniation (LDH), and (2) compare clinical outcomes after conservative treatment in LDH patients with and without GJL. We understood that they used both the study group (patients with LDH) and the control group (without LDH) to explain (1), and presented ...
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justified. Subjects who fail to satisfy an entry criterion may be excluded from the analysis without the possibility of introducing bias only under the following circumstances: 1) the entry criterion was measured prior to randomization; 2) the detection of the relevant eligibility violations can be made completely objectively; 3) all subjects receive equal scrutiny for eligibility violations (T...
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One of the simplest and most widely used multiple comparison tests is the Bonferroni adjustment (test). It is applicable to the following situations: 1) Regardless of whether or not the sample sizes of each group are equal. 2) When the family of interest is the particular set of comparisons (not all pair-wise comparisons). We can easily obtain the results of the Bonferroni comparison by multipl...
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ژورنال
عنوان ژورنال: Korean Journal of Family Medicine
سال: 2014
ISSN: 2005-6443,2092-6715
DOI: 10.4082/kjfm.2014.35.6.325