feature idea - Cuff Pressure tab - new plots of scans done

[jcf2]

(Note: this is a copy over from the Confluence task list, where it had priority "mid".)

Idea: add a new plot to show how trends of "CUFF2 given CUFF1" change over time, by site.

The CUFF1 scan is the individualized pressure, and CUFF2 is standard pressure. A subset of subjects can't do either (cuff contraindicated), and another subset may do CUFF1 but not CUFF2, e.g. if that pressure is too high relative to what was used on CUFF1. The "CUFF2 given CUFF1" here means we'd be interested in looking at stats for the group that got CUFF1, specifically whether or not they got CUFF2 as well.

Notes:

1. Measure: % of cases where subjects with CUFF1 got a CUFF2 as well could be the base. There could be a cumulative average or a moving average plotted against date.
2. The window to calculate and plot in could be determined by the date filtering selection.
3. Option to combine or separate out V1 and V3 could be helpful.
4. The main goal would be site level review, but combined by MCC and combined over all would be nice too.