Validation and Standardization of the Generalized Anxiety Disorder Screener (GAD-7) in the General Population

Abstract

Evidence supports reliability and validity of the GAD-7 as a measure of anxiety in the general population. The normative data provided in this study can be used to compare a subject's GAD-7 score with those determined from a general population reference group.

A prospective service evaluation of acceptance and commitment therapy for patients with refractory epilepsy

“…The reliability and validity of the GAD-7 have been tested and supported by a number of studies in both the general population and patients with psychopathology [18] [19,20]. The GAD-7 has been validated by significant positive correlations with a number of anxiety measures, including the Hamilton Anxiety Scale, Beck Anxiety Inventory and the anxiety sub-scale of Symptom Checklist-90 [17,21] and it has previously been used as a screening tool in epilepsy [22].…”

The Implications of Psychological Symptoms for Length of Sick Leave

“…We used three subscales of the German version of the Patient Health Questionnaire (PHQ) to assess depression (19), anxiety (20,21), and somatization (22). The depression severity score of the PHQ, the PHQ-9, comprises nine items which can be summarized.…”

“…Accordingly, the aim of this study was to determine the relation between length of sick leave and burnout symptoms; and to compare the explanatory power of the Maslach Burnout Inventory-General Survey Questionnaire (MBI-GS) (18) with the established psychometric scales of the Patient Health Questionnaire (PHQ), namely the depression and anxiety scales (19)(20)(21). Moreover, we investigated to which extent the primary care physicians explored work-place related stress factors during patient evaluation.…”

Factor structure and construct validity of the Generalized Anxiety Disorder 7-item (GAD-7) among Portuguese college students

“…As a short and objective self-report measure showing strong properties as a screening tool 11 , researchers have tested its psychometric characteristics in several settings. In this context, over the last decade, GAD-7 has been presented as a reliable and valid questionnaire in different languages 14,15,16,17,18 including Portuguese 19 , with heterogeneous psychiatric samples 20,21 for specific medical conditions 22,23,24,25 in the general population 26 and in geriatric samples 27 . However, the one-dimensional nature of GAD-7 proposed by the original model is not consistent in the literature.…”