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I found that by using Proc Mixed in SAS to run a repeated measure ANOVA, the p-values from the table "Solution for Fixed Effects" are different from the table "Type 3 Tests of Fixed Effects" when...
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In a cohort study, risk factor of frailty is analyzed. However, the subjects lost to follow up were more frail at baseline. So there is selection bias. Is it good to use IPW (Inverse Probability...
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I am working on the sample size calculation. There are many outcomes and many independent variables needed to be tested. The type I error rate will be increased due to many hypothesis testings....
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I have a case group and a control group, which is age-sex-matched with ratio 1 case: 2 control. I'm wondering what test is suitable to test their mean difference. To test matched groups, some...
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Is there any difference in SPSS to specify a variable as ordinal or scale? I know they are different in meaning, but it seems SPSS treat them the same in calculation.
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