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  1. J

    Comparing proportions between two partially overlapping samples coming from one population

    Thank you for your response. The overlap between groups is of a high percentage. However, the whole sample size is large, about 3200 polyps. DO you think a Phi correlation coefficient can work? thanks again.
  2. J

    Comparing proportions between two partially overlapping samples coming from one population

    Thank you for your response. The overlap between groups is of a high percentage. However, the whole sample size is large, about 3200 polyps. DO you think a Phi correlation coefficient can work? thanks again.
  3. J

    Comparing proportions between two partially overlapping samples coming from one population

    Hello there, I have a population of colorectal polyps, divided in 3 groups by size: 1-3 mm, 1-5 mm, 1-10 mm. So, each group contains the subjects from the smaller group. No, I want to compare the proportion of X characteristic (binary) among these groups. It seems that chi test is not enough as...
  4. J

    Regression after multiple imputation

    Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of the command stops: For split file Imputation Number = 1 the dependent variable has more than two non-missing values. For logistic regression, the...
  5. J

    Comparing missing and non-missing subjects for dependent variables

    Hello everyone. I am working with a data-set of a cohort study which has 3 different sets of paired data. For the third visit of the subjects, we have a lot of missing. So, I need to compare the basic characteristics (in the first and second visit) of the missing and non-missing subjects for my...
  6. J

    Dealing with missing values

    I am analyzing the data of a cohort study.There are three sets of paired data (same measures on same subjects in 3 different point of time). The problem is that the third set of data have more than 50% missing values. my question is that, how can i deal with these missing? does MI help in these...