Hi all,

I'll just quickly explain the survey question I'm trying to fix the logic for.
The question in my survey is: "For which of the following reasons, if any, do you use self-monitoring of blood pressure?" And the answers are:
- For diagnosis of hypertension (1)
- To exclude or confirm white coat hypertension (2)
- To exclude or confirm masked hypertension (3)
- To monitor control in treated patients (4)
- As an aid to medication adherence (5)
- As an aid to lifestyle change adherence (diet/exercise) (6)
- Other (please specify)
- None of the above

I'm trying to make the logic to the question such that if they answer a question with multiple choices:
- 1 OR 3
- 1 AND 3
Then they will be shown different questions later in the survey. However, it seems that with [group of checkboxes] style questions it only allows me to write it as "1 OR 3", and doesn't allow me to write it as "1 AND 3". Is it possible to do this?
I've attached a photo so that it might make a bit more sense.

Can you please help? Thanks very much!

There are two options: you write two conditions, one for 1 and one for 3.

Or, and I would recommend to do this: Learn how to use relevance equations and you can write something like this:

Hi Holch,

Thanks very much for the help. I'm still a bit confused though, because when I write two different conditions Limsurvey automatically puts the operators OR or AND for you like it says in the manual:

"However, it is important to understand that LimeSurvey automatically determines which logical operator to apply: this means that the use of the OR or AND operators is determined according to the context of the condition."

Is there a simple way around this? I.e. can I change the OR to an AND? Or do I need to write a relevance equation like what you've written?

Please ignore above message, I managed to figure it out in the end! Thanks again