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Validation Information: Diet History Questionnaire (Pregnant women)

Shiraishi 2012

Validity and reproducibility of folate and vitamin B12 intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women B12 intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women

Background

No validated dietary questionnaire for assessing folate and vitamin B12 intakes during pregnancy is available in Japan. We evaluated the validity and reproducibility of intakes of folate and vitamin B12 estimated from a self-administered diet history questionnaire (DHQ) in Japanese pregnant women.

Methods

A sample of 167 healthy subjects with singleton pregnancies in the second trimester was recruited at a private obstetric hospital in metropolitan Tokyo from June to October 2008 (n = 76), and at a university hospital in Tokyo from June 2010 to June 2011 (n = 91). The dietary intakes of folate and vitamin B12 were assessed using the DHQ. The serum concentrations of folate and vitamin B12 were measured as reference values in the validation study. To assess the reproducibility of the results, 58 pregnant women completed the DHQ twice within 4-5 week interval.

Results

Significantly positive correlations were found between energy-adjusted intakes and serum concentrations of folate and vitamin B12 (r = 0.286, p < 0.001 and r = 0.222, p = 0.004, respectively). After excluding the participants with nausea (n = 121), the correlation coefficient for vitamin B12 increased to 0.313 (p = 0.001). When participants were classified into quintiles based on intakes and serum concentrations of folate and vitamin B12 , approximately 60% were classified in the same or adjacent quintile. The intraclass correlation coefficients of the two-time DHQ were 0.725 for folate and 0.512 for vitamin B12 .

Conclusion

The present study indicated that the DHQ had acceptable validity and reproducibility for assessing folate and vitamin B12 intakes in Japanese pregnant women.

 

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Validation Information

Author
Shiraishi
Year of Publication
2012

Tool Information

Dietary Exposure Measured
Energy, Micronutrient
Tool Type
Diet History Questionnaire
Timeframe Tool Measures info
1 month
Portion Size Measures info
Standard portion sizes for target group derived from various recipe books and National Nutrition Survey for Japan
Reporting Method info
Retrospective
Format info
Paper
Supplements Measured
Excluded
Administration Method info
Self-administered

Study Information

Study Location
Tokyo, Japan
Associated Nutrient Database
Japanese standard food composition tables
Comparator Validated Against
Biomarkers

Participants

Sample Size
167 (Female)
Lifestage
Adults
Age of Population

Mean (SD): 32.4 (4.9) years

Sex
Female Only
Other Notable Characteristics
Subjects were 2nd trimester pregnant women from 2 hospitals in Tokyo, Japan

Total number of nutrients validated: 2 info

Not all of the nutrients validated in the validation studies are included in the table below, as statistical data was only selected to be displayed for a number of nutrients, this included:

  • Energy
  • Fat
  • Saturated Fat
  • Mono-unsaturated Fat
  • Poly-unsaturated Fat
  • Carbohydrates
  • Protein
  • Sugar
  • Non‐starch polysaccharides(NSP)
  • Sodium
  • Calcium
  • Iron
  • Zinc
  • Retinol
  • Folate
  • Folic Acid
  • Vitamin B12
  • Vitamin C
  • Fruit & Vegetables
  • Urinary Nitrogen

To find information on the other validated nutrients please read the validation study.

  • Energy
  • Macronutrients: 0
  • Micronutrients: 2
Comparator Lifestage Sex Nutrient Measured info Mean Difference Standard Deviation info Correlation Coefficient info Cohen's Kappa Coefficient Percentage Agreement Percentage Agreement Categories info Lower Limits of Agreement Upper Limits of Agreement
Biomarkers Adults Female Only Folate (µg) 254.4 370.2 0.006 (Part corr)
Vitamin B12 (µg) -262.2 -95.9 -0.091 (Part corr)

Some results have been calculated using statistical techniques based on the published data.

For further information on statistical terms click on Statistical tests used in validation studies

All correlations coefficients in the table are unadjusted unless stated otherwise. For adjusted correlation coefficients and other statistical methods used in the study e.g. paired t-tests, please read the validation articles.

  • # Adjusted
  • † Energy adjusted.
  • ‡ For loge-transformed, energy-adjusted nutrient intakes.
  • ^ Adjacent included.
  • ᵟ Participants provided identical responses.
  • (w) = Weighted.

Shiraishi M, Haruna M, Matsuzaki M, Murayama R, Sasaki S & Murashima S. Validity and reproducibility of folate and vitamin B12 intakes estimated from a selfadministered diet history questionnaire in Japanese pregnant women. Nutrition Journal. 2012. 11:15