PMID- 19347210
OWN - NLM
STAT- MEDLINE
DCOM- 20090828
LR  - 20191210
IS  - 1678-4464 (Electronic)
IS  - 0102-311X (Linking)
VI  - 25
IP  - 4
DP  - 2009 Apr
TI  - [Assessment of reproducibility and validity of a food frequency questionnaire in 
      a sample of adults living in Porto Alegre, Rio Grande do Sul State, Brazil].
PG  - 840-8
LID - S0102-311X2009000400015 [pii]
AB  - The reproducibility and validity of a Food Frequency Questionnaire (FFQ) was 
      evaluated in 83 adults living in a State capital in southern Brazil. The 
      reproducibility and validity were tested with intra-class correlation 
      coefficients (ICC). Mean nutrient intakes from three 24-hour dietary recalls 
      (24hDR) were compared to mean intakes from each FFQ (FFQ1 and FFQ2), adjusted for 
      energy intake and within-person variation. Nutrients were categorized into 
      quartiles and assessed using weighted kappa statistics. Mean ICC for the 
      test-retest FFQ ranged from 0.44 (95%CI: -0.19-0.76) to 0.83 (95%CI: 0.72-0.90) 
      for energy-adjusted carbohydrate and vitamin C intakes, respectively. Mean ICC, 
      energy-adjusted and corrected for within-person variability, ranged from 0.23 
      (95%CI: -0.22-0.61) to 0.86 (95%CI: 0.21-1.16) for vitamin A and lipids for the 
      FFQ1, and 0.50 (95%CI: -0.16-0.91) to 0.95 (95%CI: 0.79-1.05) for vitamin A and 
      energy for the FFQ2. For the FFQ1, calcium showed the lowest weighted kappa value 
      (0.10; 95%CI: 0.00-0.26), while vitamin C (0.38; 95%CI: 0.23-0.53) and total 
      energy (0.38; 95%CI: 0.24-0.52) had the highest weighted kappa for the FFQ2. The 
      FFQ showed good reproducibility and reasonable relative validity.
FAU - Zanolla, Anelise Fernanda
AU  - Zanolla AF
AD  - Universidade do Vale do Rio dos Sinos, Sao Leopoldo, Brasil.
FAU - Olinto, Maria Teresa Anselmo
AU  - Olinto MT
FAU - Henn, Ruth Liane
AU  - Henn RL
FAU - Wahrlich, Vivian
AU  - Wahrlich V
FAU - Anjos, Luiz Antonio dos
AU  - Anjos LA
LA  - por
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Validation Study
TT  - Avaliacao de reprodutibilidade e validade de um questionario de frequencia 
      alimentar em adultos residentes em Porto Alegre, Rio Grande do Sul, Brasil.
PL  - Brazil
TA  - Cad Saude Publica
JT  - Cadernos de saude publica
JID - 8901573
SB  - IM
MH  - Adult
MH  - Brazil
MH  - *Diet Surveys
MH  - *Energy Intake
MH  - *Feeding Behavior
MH  - Female
MH  - Food/*statistics & numerical data
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Reproducibility of Results
MH  - *Surveys and Questionnaires
MH  - Young Adult
EDAT- 2009/04/07 09:00
MHDA- 2009/08/29 09:00
CRDT- 2009/04/07 09:00
PHST- 2008/04/29 00:00 [received]
PHST- 2008/10/29 00:00 [accepted]
PHST- 2009/04/07 09:00 [entrez]
PHST- 2009/04/07 09:00 [pubmed]
PHST- 2009/08/29 09:00 [medline]
AID - S0102-311X2009000400015 [pii]
AID - 10.1590/s0102-311x2009000400015 [doi]
PST - ppublish
SO  - Cad Saude Publica. 2009 Apr;25(4):840-8. doi: 10.1590/s0102-311x2009000400015.