add p-value column in a forrest plot/ effectmeasureplot about zepid HOT 2 CLOSED

@pzivich Thank you for your response. I modified the code and it works fine. I am going to close this issue.

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Hello, p-values cannot be added with the current forest plot implementation.

I don't plan to add functionality to display p-values in the forest plots. There are two reasons for my decision: (1) null hypothesis significance testing (NHST) lends itself to misinterpretations, (2) no extra information is provided when adding a p-value compared to the plot and confidence interval estimates, and (3) if a user is determined to do NHST they are still do so with the confidence intervals. The standard to avoid p-values is common across the functionalities within zEpid for this reason (e.g., no estimators return p-values).

If you are determined to add p-values to a forest plot, I would recommend adapting the class object here. The class is self-contained, so it should be easily to copy and edit accordingly. You would need to add (1) input for a vector of p-values, (2) add a label in the table, (3) have the table tval argument add the p-values as rows (along with the updated labels) here.

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