GAD2 and Anxiety: In the cohabiting group, GAD1 (feeling nervous, anxious, or on edge)–GAD2 (not being able to stop or control worrying) and GAD5 (being so restless that it is hard to sit still)–GAD6 (becoming easily annoyed or irritable) also constituted the stable backbone of the anxiety network (r = 0.443 and r = 0.432, respectively).