DATA Step, Macro, Functions and more

which statistical test to choose?

Reply
New Contributor
Posts: 3

which statistical test to choose?

Hello all,

 

I am naïve to statistics. I need help with one of my research projects. Below is my data:

Dependent variable: change in hypertension (I have baseline measure and one year-after treatment measure)-continuous variable

Independent variable: 1. Drug groups (drug a, drug b, drug c): one patient on one drug only

2. Sample groups (sample a, sample b, sample c): one patient might present in more than one groups.

 

The question is to find out the changes observed from baseline to one year-after treatment hypertension reading when controlling for factors like age, gender, race etc.

 

What is the appropriate statistical test to use?

 

Thanks in advance,

BB

PROC Star
Posts: 7,363

Re: which statistical test to choose?

There is a conflict in what you said. Did any patients get multiple drugs?

 

If so, they may have to be excluded. Other than that, sounds like a repeated measures ANOVA (probably proc GLM) see: https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwj4zcfNw4TTA...

 

Art, CEO, AnalystFinder.com

New Contributor
Posts: 3

Re: which statistical test to choose?

Thanks for your reply.

None of the patients were on multiple drugs.

so, One patient present in one drug group only.

 

But one patient might be present in more than one sample group.

 

 

There are two Independent variables.

  1. Drug groups

Drug a

Drug b

Drug c

one patient on one drug only. (patients on multiple drugs were excluded from the study)

  1. Sample groups

Sample x: Patients with disease CA/PH

Sample y: Patients with only disease CA

Sample z: Patients with disease CA/PH with no previous drug history

one patient might present in more than one groups. 

Super User
Posts: 17,840

Re: which statistical test to choose?

Post sample data that is representive of your actual data. 

New Contributor
Posts: 3

Re: which statistical test to choose?

Thanks for your reply!

There are two Independent variables.

  1. Drug groups

Drug a

Drug b

Drug c

one patient on one drug only. (patients on multiple drugs were excluded from the study)

 

  1. Sample groups

Sample x: Patients with disease CA or PH

Sample y: Patients with disease CA only

Sample z: Patients with disease CA or PH with no previous drug history

 

So, one patient might be present in more than one groups.

 

Below is how the data looks like.

 

piddrugdiseasedrug_historysample_group
1ACA1x
1APH1x
2CCA1x, y
3BPH1x
4CPH0x,z
5BCA1y
     

 

Thanks,

BB

Contributor
Posts: 39

Re: which statistical test to choose?

what exactly is the significance of the sample group?

Ask a Question
Discussion stats
  • 5 replies
  • 260 views
  • 1 like
  • 4 in conversation