Over the past month, how frequently have you been bothered by:
Having difficulty concentrating
Longitudinal Variable
PTSD15
Cross Sectional Variable(s)
PTSD15_70
PTSD15_69
PTSD15_68
Coding
1 = Not at all | 2 = A little bit | 3 = Moderately | 4 = Quite a bit | 5 = Extremely | 6 = N/A
Scale
Domain