PMID- 19548571
OWN - NLM
STAT- MEDLINE
DCOM- 20120823
LR  - 20181201
IS  - 1000-8020 (Print)
IS  - 1000-8020 (Linking)
VI  - 38
IP  - 3
DP  - 2009 May
TI  - [Study of validity and reproducibility of food frequency questionnaires for 
      residents over 50-years-old in Xi'an City].
PG  - 299-302
AB  - OBJECTIVE: To examine the validity and reproducibility of Xi'an food-frequency 
      questionnaire (FFQ) used to evaluate the diet intakes for residents in Xi'an 
      City. METHODS: 125 males and females aged 50-80 years, from districts of urban 
      Xi'an City, participated and completed all the six interviews in this study. 
      Reproducibility of the questionnaire measurements was obtained by a repeated 
      administration of the FFQ at one year interval. The mean of 24-hour dietary 
      recalls (24-HDR) applied at three months intervals served as reference method for 
      the estimation of the relative validity of questionnaire measurements. RESULTS: 
      Spearman correlation coefficients for reproducibility between two FFQs ranged 
      from 0.38 for cakes to 0.74 for tea. Coefficients for validity assessed by four 
      24-HDRs were statistically significant for almost all food groups ranged from 
      0.12 to 0.74. After correction for within-subjects error, all correlation 
      coefficients were improved, ranged from 0.17 to 0.79. CONCLUSION: Therefore, 
      Xi'an FFQ appears to be reasonably valid and reliable for most food groups.
FAU - Wang, Xiaoqin
AU  - Wang X
AD  - School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China. 
      wangxiaoqin@mail.xjtu.edu.cn
FAU - Yan, Hong
AU  - Yan H
FAU - Sa, Rina
AU  - Sa R
LA  - chi
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - China
TA  - Wei Sheng Yan Jiu
JT  - Wei sheng yan jiu = Journal of hygiene research
JID - 9426367
SB  - IM
MH  - Aged
MH  - Aged, 80 and over
MH  - China
MH  - Cities
MH  - *Diet Surveys
MH  - Female
MH  - Humans
MH  - Male
MH  - Mental Recall
MH  - Middle Aged
MH  - *Nutritional Status
MH  - Reproducibility of Results
MH  - Surveys and Questionnaires/*standards
EDAT- 2009/06/25 09:00
MHDA- 2012/08/24 06:00
CRDT- 2009/06/25 09:00
PHST- 2009/06/25 09:00 [entrez]
PHST- 2009/06/25 09:00 [pubmed]
PHST- 2012/08/24 06:00 [medline]
PST - ppublish
SO  - Wei Sheng Yan Jiu. 2009 May;38(3):299-302.