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    Validating an existing non-validated checklist

    I have a question for everyone. Is it possible to validate an existing published checklist that has not yet been validated with the authors' permission? If so, what steps would you recommend to use go about for testing validity and reliability? We do not want to create a whole new checklist on...
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    Split-plot ANOVA

    I am reviewing a manuscript for potential publication for a journal and the authors are examining the percentage change in body fat between 2 groups from baseline (T0), 3 months (T1), 6 months (T2), and 12 months (T3) using a mixed-plot ANOVA. At baseline, their percentage change in body fat is...
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    Odds ratio and confidence interval both 0?

    All awesome suggestions. I have dropped it from the model as there were only 2 subjects with the outcome of interest which is why the OR, CI, and SE went crazy. Thanks very much!
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    Odds ratio and confidence interval both 0?

    No my primary and secondary outcomes were decided a priori so I wouldn't change those. Just wondered how odd it would be to keep an Exp(B) of 0 in a table? Again, the same variable was associated with my other outcomes so I wanted to report it for consistency. I am working.
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    Odds ratio and confidence interval both 0?

    I just checked and you were bang on. Thanks kindly! It was related to a very small number of people in one category of the independent variable with the binary outcome of interest. So one more question if I may. This independent variable was highly associated with other secondary outcomes so...
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    Odds ratio and confidence interval both 0?

    The Exp(B) = 0 in a logistic regression model and the lower limit of the confidence interval = .000 with no upper limit. The p-value is 0.99 and the Wald = .000. Any ideas what's going on?
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    Odds ratio and confidence interval both 0?

    How is it possible to have both an odds ratio and confidence interval of zero in a logistic regression model? All other predictors look good.
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    Large sample size but lots of missing data for ONE co-variate

    I am running a logistic regression analysis and I have pretty much have complete data for all variables in my model except for one important co-variate where just over 30% of data are missing! When I've run the model with the one variable with all the missing data, the same variables are...
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    Regression coefficient and SE = 0

    My bad - my outcome variable is binary and I used logistic regression, not multiple regression. Will post output later.
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    Regression coefficient and SE = 0

    B=.000; SE=.000; Wald=6.932; df=1; Sig=.011; And then this is weird: Exp(B)=1.000 with a 95% CI = 1.000, 1.000
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    Analysis for a Cluster RCT

    I am conducting an analysis for a cluster RCT, where the clusters are schools. When I compare the intervention to the control group overall without assessing the impact of the intervention on specific clusters, there is no statistically significant difference in the continuous outcome variable...
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    Regression coefficient and SE = 0

    I have a continuous variable in my regression model that is normally distributed. It has a statistically significant relationship with my continuous outcome variable, but the regression coefficient and standard error are both 0. What should I do in this situation? What would cause the...