Comparative Assessment of Food Frequency Questionnaires
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- Levels of carotenoids in plasma
研究概览
简要总结
Fruits and vegetables are an important source of many different phytochemicals that may affect health and accurate dietary assessement tools to quantitate dietary intake are essential. This study will evaluate the correlation of dietary carotenoid intake estimated from two common and one novel food frequency questionnaire (FFQ) with estimated carotenoid intake from 3 day diet records as well as measured blood and skin concentrations of carotenoids. This study will be conducted in healthy adults. These tools may be effective in estimating the level of these compounds in an average diet.
详细描述
PRIMARY OBJECTIVES:
I. To examine the relationship between estimated intakes of dietary carotenoids using three different FFQ's and comparing them with estimated carotenoid intake from 3 day diet records and blood and skin measurements.
OUTLINE:
Participants complete the Willett FFQ, the Fred Hutchinson FFQ, and the newly developed Clinton Carotenoid Assessment Tool (CCAT), in random order over a 3 to 4-month period of time with 4-6 weeks between each visit. Prior to each visit, participants also complete a 3-day diet record, a daily sun exposure diary, and a 3-day activity record. Blood samples are collected for plasma carotenoid assessment and and skin carotenoid content is assessed using a resonance Raman spectroscopy.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 20 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Be literate and able to understand English
- •Have a body mass index (BMI) between 18.5 and 30 kg/m^2; this represents the lowest end of the healthy BMI range and the upper limit of the overweight BMI range for our target age range
- •Be a non-smoker (defined as adults who have never smoked or who have not had a cigarette in the past ten years)
- •Not currently be taking any vitamins, minerals, or dietary supplements (or agree to discontinue use for the duration of the study) and agree to consume a standardized daily multivitamin for the remainder of the study (CVS One Daily)
- •Voluntarily agree to participate and sign an informed consent document
- •Agree to three separate blood draws
- •Agree to three separate spectroscopy scans to assess skin carotenoid levels
- •Agree to complete three separate 3-day diet records, three separate 3-day activity records, and one habitual physical activity questionnaire
排除标准
- •Have an active metabolic or digestive illness, including malabsorptive disorders, renal insufficiency, hepatic insufficiency, hyper- or hypothyroidism, cachexia, morbid obesity, or short bowel syndrome
- •Have an active or a recent history of any condition that causes altered immunity, such as chronic inflammatory disease, autoimmune disorders, cancer, anemia, and blood dyscrasias
- •Are heavy alcohol consumers (defined as an average consumption of greater than 2 drinks/day)
结局指标
主要结局
Levels of carotenoids in plasma
时间窗: Up to 3 months
Pearson correlations will be used to compare plasma levels of individual carotenoids with their respective dietary intake after adjustment for total energy, plasma cholesterol, plasma triglycerides, and BMI. Statistical analysis will be conducted using Stata version 11.
FFQ estimated carotenoid intake
时间窗: Up to 3 months
The relationship between the carotenoid values from the FFQ, both the unadjusted and the energy-adjusted estimates, and averages of the 3-day diet records will be estimated using the Pearson correlation coefficients. Statistical analysis will be conducted using Stata version 11.
CCAT ability to estimate carotenoid intake
时间窗: Up to 3 months
CCAT carotenoid intake will be correlated with blood carotenoid profiles. Statistical analysis will be conducted using Stata version 11.
次要结局
未报告次要终点
研究者
Steven Clinton
Principal Investigator
Ohio State University Comprehensive Cancer Center