Related Variables

	chrphle	Did you usually bring up phlegm like this as much as twice a day?	Lab Visit
	couphl3	Have you had periods or episodes of increased cough and phlegm lasting three weeks or more?	Lab Visit
	phl1st	Did you usually bring up phlegm at all on getting up or first thing in the morning?	Lab Visit
	phl3	Did you usually bring up phlegm like this for three consecutive months or more during the year?	Lab Visit
	phlrest	Did you bring up phlegm at all during the rest of the day or night?	Lab Visit