Validation of the Diet Quality Screener (DQScreen) based on the Food-Based Dietary Guidelines for Germany: Evaluation of criterion validity, relative validity, and test-retest reliability

Recruiting

Conditions: diet quality screener (DQScreen) validity and reliability

Registration Number: DRKS00032988

Lead Sponsor: Hochschule Fulda

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Recruiting

Sex: All

Target Recruitment: 112

Inclusion Criteria

BMI: 18.5-34.9 kg/m2
- good written and spoken German
- Voluntary agreement to participate in the study and understanding of the study
- Availability during the study periods
- omnivorous, flexitarian or ovo-lacto vegetarian diets
- Stable body weight (< 3 kg weight gain/loss in the past 3 months)

Exclusion Criteria

- pregnant or breastfeeding women
- degree/training in food and nutritional sciences and/or dietetics
- special diets
- vegan diet
- eating disorders
- diseases that affect memory
- chronic diseases treated with medication: all forms of diabetes mellitus, heart failure, chronic kidney disease, hypertension, dyslipoproteinaemia, hyperuricaemia/gout, chronic inflammatory bowel diseases
- long-term medication with regard to the above-mentioned illnesses
- mental illnesses incl. intake of antidepressants
- weight reduction diet/weight changes
- alcoholism, drugs as of common practice (Toft et al. 2008)
- taking supplements that affect the urine/blood concentrations of biomarkers: fatty acid supplements, supplements containing antioxidants, supplements containing potassium
- electronic implants, prostheses, life-sustaining electronic systems, portable electronic medical systems (limitations of bioimpedance analysis (BIA))
- other exclusion criteria at the investigator's discretion

Study & Design

Study Type: observational

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Comparison of the DQScreen results with biomarkers for food intake and food intake from the weighing protocol. Comparison of the DQScreen results after repeated performance after a washout period.

Secondary Outcome Measures