Reliability and validity of the Portuguese version of the Generalized Anxiety Disorder (GAD-7) scale

Table 4 Reliability indicators

GAD-7 item	α If item deleted	Item-total correlation	Test-retest correlation coefficient	Intraclass correlation
Feeling nervous, anxious or on edge	0.854	0.817**	0.857**	0.819
Not being able to stop or control worrying	0.879	0.650**	0.576**	0.570
Worrying too much about different things	0.863	0.760**	0.677**	0.671
Trouble relaxing	0.852	0.828**	0.596**	0.555
Being so restless that it is hard to sit still	0.860	0.790**	0.629**	0.620
Becoming easily annoyed or irritable	0.867	0.739**	0.654**	0.644
Feeling afraid as if something awful might happen	0.865	0.764**	0.931**	0.930

ISSN: 1477-7525