OOP misc

Added second set of full adjustments for age, race, sex, education,
smoking, adl status, and comorbidity count as a further check
Try a set of tables with 3 groups, 1st quartile, middle 2 quartiles, and
4th quartile splits
Need to set up pie charts with these quartile splits, have output tables
set up though
Add these fully adjusted spending and quartiles to the saved dataset
SIC - minor comments added
Spouse  - minor updates

Added some comments to the header sections
Added the time between S n1 and p1 interview to the overall sample
characteristics table