Mixed
An expanded 131-item self-administered semiquantitative food frequency questionnaire (FFQ) provides a reproducible and valid measure of average daily nutrient intake over a one-year period in male health professionals, with correlations to diet records ranging from 0.28 to 0.86.
For large-scale health studies, a 131-item food frequency questionnaire is a valid and reproducible tool for estimating average nutrient intake over a year. It correlates well with detailed diet records for many nutrients (mean correlation 0.59-0.65) and accurately identifies individuals with high or low intake, making it suitable for epidemiological research into diet and disease.
These data indicate that the expanded semiquantitative food frequency questionnaire is reproducible and provides a useful measure of intake for many nutrients over a one-year period.
Why this rating
Large sample size (n=127 validation, n=51,529 cohort), use of diet records as a comparator, and statistical adjustment for energy.
Source
Reproducibility and Validity of an Expanded Self-Administered Semiquantitative Food Frequency Questionnaire among Male Health Professionals
Eric B. Rimm et al. · American Journal of Epidemiology · 1992
DOI 10.1093/oxfordjournals.aje.a116211
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →