It's hard to know what you want to do without more information. It appears that you want to display record counts for each health issue broken down by age (<5 and >=5). I suggest that you make a report that is unbound - nothing in the record source of the report. Use the DSum function to do your math based on a totals query where you count records by age. I created a simple example and attached it here. It will take a little work ... but once you get one health issue working properly, you can copy and paste it and just change the references to the proper health issue field.