Instrument Variable Name: DitIMM
* Read if necessary.
DURING THE PAST 12 MONTHS, did you use the [fill: diet used most] diet for any of these reasons?
... To improve or enhance immune function
9 Don't know
Universe Text: Sample adults 18+ who have used a special diet in past 12 mos
(1,2,Refused,Don't know) [goto DitNOHP]