Hi Don:

Congratulations, you're the first person to respond in 2.5 years! I'd forgotten that I had ever posted this question on SSC.

Since my posting, I've continued to maintain the patient profile report using the multiple datasets approach (which essentially means having multiple data regions). Performance is still very good. I never did test an approach using subreports, probably because the multiple datasets performed well and maintaining the report has been fairly easy.

Interestingly enough, I haven't come across much of a need to build subreports that could be included in different reports -- i.e., "build once, use everywhere". The concept is somewhat interesting, I suppose, but one of the "gotchas" of subreports is that they take on the page layout of the master/container report.

--Pete