Frailty criteria and cognitive performance are related: data from the Fibra study in Ermelino Matarazzo, Sao Paulo, Brazil - Yassuda, Mônica Sanches; Lopes, Andrea; Cachioni, Meire; Falcão, Deusivania Vieira da Silva; Batistoni, Samila Sathler Tavares; Guimarães, Vanessa Martins Valente; Neri, Anita Liberalesso (Journal of Nutrition, Health and Aging, 2012)