Because of your headaches on how many days in the last 3 months was your productivity in house-hold work reduced by half or more [PhenX]
LOINC
65384-0
Component
Because of your headaches on how many Ds in the last 3Mo was your productivity in house-hold work reduced by half or more
System (specimen)
^Patient
Property
NRat
Scale
Qn
Method
PhenX
Class
PHENX
Status
TRIAL