title: Validity of a diet history questionnaire estimating β-carotene, vitamin C and α-tocopherol intakes in Japanese pregnant women.
abstract: We investigated the validity and reproducibility of a self-administered diet history questionnaire (DHQ) that estimates the intakes of β-carotene, vitamin C and α-tocopherol. Ninety-five healthy women with singleton pregnancies in the second trimester were examined at a university hospital in Tokyo. The intakes of β-carotene, vitamin C and α-tocopherol assessed by the DHQ were compared to the corresponding serum concentrations. To assess the reproducibility, 58 pregnant women completed it in two sessions within a 4-5 week interval. We found significantly positive correlations between the energy-adjusted intakes and serum concentrations of β-carotene and vitamin C (r = 0.254 and r = 0.323, respectively). However, α-tocopherol intake was not associated with the corresponding serum concentration. The intraclass correlation coefficients of the two-time DHQ were 0.743 (β-carotene), 0.665 (vitamin C) and 0.718 (α-tocopherol). DHQ has acceptable validity and reproducibility for β-carotene and vitamin C intakes in Japanese pregnant women.
authors.affiliation: Midwifery and Women's Health, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan. mi-shi@umin.ac.jp
authors.forename: Mie
authors.initials: M
authors.lastname: Shiraishi
authors.forename: Megumi
authors.initials: M
authors.lastname: Haruna
authors.forename: Masayo
authors.initials: M
authors.lastname: Matsuzaki
authors.forename: Ryoko
authors.initials: R
authors.lastname: Murayama
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sasaki
mesh_terms: D000328:Adult; D001205:Ascorbic Acid / Q000008:administration & dosage* / Q000097:blood; D015415:Biomarkers / Q000097:blood; D004032:Diet / Q000208:ethnology; D005260:Female; D006785:Hospitals, University; D006801:Humans; D015596:Nutrition Assessment; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D039401:Prenatal Nutritional Physiological Phenomena / Q000208:ethnology; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014041:Tokyo; D014504:Urban Health / Q000208:ethnology; D024502:alpha-Tocopherol / Q000008:administration & dosage* / Q000097:blood; D019207:beta Carotene / Q000008:administration & dosage* / Q000097:blood
chemical_list: D015415:Biomarkers; D019207:beta Carotene; D024502:alpha-Tocopherol; D001205:Ascorbic Acid