Adherence

A short food-frequency questionnaire (SFFQ) with 50 items provides adequate agreement and reproducibility with a comprehensive 161-item questionnaire for ranking dietary intake of major food groups and macronutrients in men with prostate cancer.

For researchers or clinicians studying diet in prostate cancer patients, using a validated 50-item short questionnaire is a viable strategy. It takes only 15 minutes to complete and accurately ranks patients' intake of major food groups (like fruits, dairy, and seafood) compared to much longer surveys. This reduces participant burden and increases the feasibility of long-term studies, though it may be less accurate for total fat intake.