Sx freq: trouble concentrating (e4g2, non-communicative)

SAS Name
FREQ_CONCENTRATE_TROUBLE_NC 

Over the last 2 weeks, how often did the patient/resident have trouble concentrating on things, such as reading the newspaper or watching television?

Code Code value
0 Never or 1 day
1 2-6 days (several days)
2 7-11 days (half or more of the days)
3 12-14 days (nearly every day)
9 Unknown or unable to assess
-7 Skipped correctly