About Melk

Melk · ‎12-04-2017

I have a vertical bar plot of means by visit number paneled by group. Since I only have a few patients in my sample, I would like to overlay this plot with individual line plots. Is there an easy way to do this?

Melk · ‎11-20-2017

Can I use double arrays if this is one part of multiple ands in an if-then statement? i.e. y=0; if not missing(x) and age>=18 and died = 0 and <array statement here??> then do; y=1; end; run;

Melk · ‎11-20-2017

As part of an if-then statement, I need to flag observations with certain codes in any of 25 variables dx1-dx25. What is the best way to do this? y=0 if not missing(x) and... <something translating to 123 or 234 in any of dx1-dx25> ...then y=1 end; run;

Melk · ‎11-14-2017

I think relrisk does not work for rxc tables. I am not sure what the denominator component of the relative risk calculation should be for a 2x8 table.

Melk · ‎11-14-2017

I am interested in determining the relative risk of mortality for each level of an independent variable (8 levels), with the lowest being the reference level. What model would be appropriate to calculate this?

Melk · ‎11-01-2017

I am using a mixed model and restricting the analysis to a single group of interest using a where statement in my model. There are 3 visits. I would like to know if there is a significant change in my outcome variable over time. If I treat my visits as continuous, will the fixed effect p-value for visit tell me if my outcome significantly changed over time? Not sure how to treat visit here.

Melk · ‎10-30-2017

Don't know why I didn't think of that - thanks!

Melk · ‎10-30-2017

What p-value would give me the significance of the difference between pre and post then?

Melk · ‎10-30-2017

I am running an ANOVA (on change score controlling for pre) on some pre-post data for a 2 group randomized trial. I have 1 pre and 1 post measurement. I want a p-value for the within group change from pre to post for each group, separately. Any way I can output this in my GLM model?

Melk · ‎10-27-2017

SAS 9.4

Melk · ‎10-27-2017

Worked beautifully - much appreciated.

Melk · ‎10-27-2017

I am formatting the response variable as a percent since it is a binary variable, and I want the proportion of 1s (vs 0s). I want the total sample size in each group to be displayed per bar (num of 0s + 1s). Because of this format I think, when I run with your suggestions it is giving me percentages rather than counts. Am I able to employ 2 different formats for the same variable within a proc block? proc sgplot data=dat; vbar days / response=mort stat=mean; format mort percent6.2; run;

Melk · ‎10-27-2017

I am running an sgplot vbar where the stat is the mean and I would like to label each vbar with the sample size in each group. is there a way I can do this, something like datalabel=(stat=sum) [but this does not work].

Melk · ‎10-26-2017

worked beautifully - thank you.

Melk · ‎10-26-2017

Is there any way to plot one variable and the row pct for that variable by another (from proq freq) as histogram? Specifically, I have 2 variables, one is continuous that I am treating categorically (1-20) and the other is a binary 0/1 variable. I want to plot the first variable on the x axis and the row percent for the category 1 as the y axis.

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