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Titolo:
Validity and reproducibility of a self-administered questionnaire to determine dietary supplement users among Japanese
Autore:
Ishihara, J; Sobue, T; Yamamoto, S; Sasaki, S; Akabane, M; Tsugane, S;
Indirizzi:
Natl Canc Ctr, Res Inst, Canc Informat & Epidemiol Div, Chuo Ku, Tokyo 1040045, Japan Natl Canc Ctr Tokyo Japan 1040045 iol Div, Chuo Ku, Tokyo 1040045, Japan Natl Canc Ctr, Res Inst, Kashiwa, Chiba, Japan Natl Canc Ctr Kashiwa Chiba Japan c Ctr, Res Inst, Kashiwa, Chiba, Japan Tokyo Univ Agr, Tokyo, Japan Tokyo Univ Agr Tokyo JapanTokyo Univ Agr, Tokyo, Japan
Titolo Testata:
EUROPEAN JOURNAL OF CLINICAL NUTRITION
fascicolo: 5, volume: 55, anno: 2001,
pagine: 360 - 365
SICI:
0954-3007(200105)55:5<360:VAROAS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNITED-STATES; BREAST-CANCER; VITAMIN SUPPLEMENTS; NATIONAL-HEALTH; COLON-CANCER; RISK; WOMEN; MORTALITY; CALCIUM; TRENDS;
Keywords:
dietary supplements; questionnaires; validity of results; reproducibility of results; epidemiologic measurements;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Ishihara, J Natl Canc Ctr, Res Inst, Canc Informat & Epidemiol Div, Chuo Ku, 5-1-1 Tsukiji, Tokyo 1040045, Japan Natl Canc Ctr 5-1-1 Tsukiji Tokyo Japan 1040045 040045, Japan
Citazione:
J. Ishihara et al., "Validity and reproducibility of a self-administered questionnaire to determine dietary supplement users among Japanese", EUR J CL N, 55(5), 2001, pp. 360-365

Abstract

Objective: To evaluate reproducibility and validity of a self-administeredfood frequency questionnaire (FFQ) to determine the dietary supplement use. Design: Questionnaire data were compared with dietary: records (BR) in foils 7 day periods for validity. FFQ1 and FFQ2 administered at an interval ofapproximately one year were compared for reproducibility. Setting and subjects: A total of 361 samples were selected fel a validation study of a questionnaire from the subgroup of the Japan Public Health Center-based prospective Study on cancer and cardiovascular disease (JPHC Study) cohort II. Categories of dietary supplements in the FFQ were 'multivitamins', 'beta -carotene'. 'vitamin C', 'vitamin E', and 'other supplements'. For each category. inquiries were made as to the brand name, frequency antiduration of use. a dietary supplement user was defined as a subject who used a dietary supplement one or more times a week for a year or longer. Results: Prevalence of overall supplement use was 10.9%, Percentage agreement between FFQ1 and FFQ2 was 91.7%. Sensitivity and specificity of supplement use by FFQ were 80.6% and 89.2%, respectively. Sensitivity was high for'vitamin C'. When the self-reported categories were corrected, sensitivityfor 'multivitamins' and 'vitamin E' improved. Conclusions: The FFQ on dietary supplements used for the JPHC 5 y follow-up survey was valid to determine overall use and well-defined dietary supplement use such as vitamin C, Categories must be corrected when determining multivitamin and 'vitamin E'.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 08:17:04