Development and validation of a food frequency questionnaire (FFQ-Porto Alegre) for adolescent, adult and elderly populations from Southern Brazil Desenvolvimento e validação de um questionário de freqüência alimentar (QFA-Porto Alegre) para a população de adolescentes, adultos e idosos do Sul do Brasil

• Egile Nagusiak: Ruth Liane Henn (Egilea), Sandra Costa Fuchs (Egilea), Leila Beltrami Moreira (Egilea), Flavio Danni Fuchs (Egilea)
• Formatua: Liburua
• Argitaratua: Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, 2010-11-01T00:00:00Z.
• Gaiak: article
• Sarrera elektronikoa: Connect to this object online.

This study assessed the validity of a food frequency questionnaire (FFQ-Porto Alegre), covering 135 food items, in comparison with the average of two consecutive 24-hour dietary recall questionnaires for adolescents, adults, and elderly who were randomly selected from a population-based survey. The...