Validation Data for a Semi-Quantitative Food Frequency Questionnaire in Northwest China

A validation study for a culturally tailored 62-item food frequency questionnaire administered to adults in Northwest China. The dataset includes reproducibility data from two FFQ administrations three months apart and relative validity data compared against three non-consecutive 24-hour food records. The data was collected using a digital Chronic Disease Follow-up Platform and nutrient intakes were calculated using the China Food Composition Database.

Use Cases

• Assess the reproducibility of dietary assessment tools based on intraclass correlation coefficients between repeated FFQ administrations.
• Evaluate the relative validity of a food frequency questionnaire based on cross-classification and Bland-Altman analysis against food records.
• Study systematic overestimation patterns in nutrient intake reporting based on the Bland-Altman analysis results.
• Investigate the application of digital platforms for dietary data collection based on the use of the Chronic Disease Follow-up Platform.

Strengths

• Validation metrics are provided, including a mean intraclass correlation coefficient of 0.71 for reproducibility.
• Cross-classification analysis showed 77.1% of participants were assigned to the same or adjacent quartile for validity.
• The study utilized a digital platform for participant management, which helped avoid loss to follow-ups.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description notes modest to fair validity correlations and systematic overestimation for energy and most nutrients.

Provenance

Source

figshare

Collection Method

Data collected via a culturally specific 62-item food frequency questionnaire and three non-consecutive 24-hour food records.

Freshness

Last updated 2026-06-04 04:30:20; freshness should be verified.

Geography

Northwest China