Geriatric Anxiety Scale: item response theory analysis, differential item functioning, and creation of a ten-item short form (GAS-10).
Mueller AE, Segal DL, Gavett B, Marty MA, Yochim B, June A, Coolidge FL. Geriatric Anxiety Scale: item response theory analysis, differential item functioning, and creation of a ten-item short form (GAS-10). Int Psychogeriatr. 2015 Jul; 27(7):1099-111.