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Calculations across records

Question asked by doctorphil on Apr 19, 2010
Latest reply on Apr 23, 2010 by philmodjunk

Title

Calculations across records

Post

Hi, 

I'm new to Filemaker Pro and am having trouble with  some particular calculations.

 

I have created a medical database to collect information regarding patients operations.

 

I need to calculate the percentage of records that return a specific value for a particular field.

 

For example, the Margin Status field has a drop down with the values "Positive", Negative" and "Abuts" which relates to the margin status of a resected tumour (ie tumour is positive at the resected margin, negative, or abuts against the resected margin). I would like to calculate the percentage of patients with a "Positive Margin" within the whole database. I have tried a subsummary count of patients with "Positive" in the Margin status field, but don't know how to divide this by the number of patients in the database. I would like to have to percentage updated each time a new patient is added to the database, and viewed within the main layout of the database.

 

Filemaker Pro 11

Mac OSX10.6.3

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