8 Clinical Trials for Various Conditions
Information about Americans food choices and opinions helps researchers and law makers to develop policies and programs to promote health. For this reason, it is important to be able to collect good quality information about how people think about food. This project will compare different ways of collecting information about food from adults.
This study will evaluate the structure of error in self-reporting instruments on diet, in following up the Observing Protein and Energy Nutrition Study (OPEN) conducted in 1999 and 2000. The OPEN study, the largest of its kind, resulted in a wealth of nutritional biomarker data-measurable indicators of changes in organisms at the level of molecules or cells. A biomarker could help in understanding how environment and disease are related and about disease risks. Furthermore, its findings showed that the relative estimates of disease risk may be weakened by a food frequency questionnaire and a 24-hour questionnaire. Scientists have long recognized that self-reported information from questionnaires and interviews contains errors, but there has been uncertainty about the structure of such errors. For the proposed study, a food record and a food checklist-adjusted food frequency questionnaire will be compared with the previously used questionnaires, to determine whether the newer study instruments present less chance of measurement error. The results may provide better tools for a study on nutritional epidemiology, that is, the incidence and other aspects of disease and nutrition. OPEN study participants will be invited for follow-up. Patients who completed the 1999-2000 study who are not currently pregnant or a liquid weight loss diet may be eligible for this study. The original study recruited men and women 40 to 69 years of age. A letter with summary results from the original OPEN study will be sent to each of the 482 participants. Both the Food Record and the food checklist, called the Daily Food List, are instruments to be given. The Food Record asks the participant to record all foods and beverages consumed. The Daily Food List asks respondents to write in to the number of times a limited number of food categories are consumed. In addition, respondents will be asked to complete the National Cancer Institute Diet History Questionnaire (DHQ), identical to the one that they completed in the original OPEN study, regarding the previous 12 months. Participants will randomly be assigned to one of two groups. All will receive four study mailings over a 3-month period: the DHQ, First 4-Day Food Record (4-day FR), Second 4-day FR, and Booklet of 7-Day Food Lists (7-day FL), the latter listing selected foods that the participants will mark if consumed on the reporting day. Study Group A will receive the DHQ, first 4-day FR, second 4-day FR, and 7-day FL. Study Group B will receive the DHQ, 7-day FL, first 4-day FR, and second 4-day FR. Within 10 days after receiving the DHQ, participants will be called to schedule an appointment for a 30- to 45-minute visit. Participants will undergo the following procedures: * Complete the Physical Activity Questionnaire (by telephone for those who have moved out of the local area or are unable to attend the visit) * Have weight measured * Be asked about whether he or she has recently developed certain medical conditions, experienced dramatic changes in diet, or gained special education in nutrition The completion time for each instrument in dietary assessment is approximately as follows: * DHQ-60 minutes. * Each 4-day FR-80 minutes (20 minutes a day). * 7-day FL-35 to 49 minutes (5 to 7 minutes a day).
The purpose of this research is to better understand people's health and diet knowledge, beliefs, attitudes, and practices. The researchers will use this information to implement better strategies to help Americans maintain more nutritious diets.
The aim of this research is to collect dietary intake, physical activity, mood and stress data during and after the Illinois shelter-in-place and social distancing orders for the COVID-19 pandemic. The study's intent is to capture data during this unprecedented time to understand the non-infection consequences of social distancing and shelter-in-place, including duration of affect after orders are lifted.
The Nutrition Study of the GA2LEN Follow-Survey was designed to investigate the association between usual dietary intake and allergic and respiratory outcomes in adults across Europe. Within this framework, a food frequency questionnaire (FFQ) was designed to ascertain usual dietary intake of 250 food items, which was translated into the languages of the participant centres. Information on daily intake of foods, nutrients, and flavonoids was derived.
This research study is for American Indian and Alaska Native (AIAN) people with diabetes in Los Angeles County, California. Participants (people who join the study) are signed up for a program that includes healthy meals, online diabetes classes, and social support. This study aims to answer the following question: Can this program (the meals, classes, and social support) have health and well-being benefits for participants, like lower blood sugar levels and less social isolation? Participants are asked to fill out surveys and go to three clinic visits. Participants do not have to pay for the clinic visits or any other parts of the study.
The specific aims of this study are: 1. To test the feasibility of a randomized controlled trial of a weight gain prevention program for breast cancer survivors that combines exercise and dietary changes during treatment. Feasibility will be evaluated by examining data on recruitment rate, attendance at intervention sessions, drop-out rates in both study conditions, assessment completion rates, and participant feedback. 2. To test the effect of a weight gain prevention program, compared to usual care, on weight, body composition, and biomarkers related to breast cancer prognosis. 3. To explore whether changes in physical activity, energy intake, and resting energy expenditure predict weight gain among breast cancer survivors. 4. To test the effect of a weight gain prevention program on quality of life variables.
The relationship between elevated phosphorus levels and morbidity and mortality in patients with chronic kidney disease (CKD) is well recognized, and dietary phosphorus restriction is a mainstay of phosphate management. Current study is an effort to test the effect of a web-based nutritional educational intervention, Kidney School(KS), to improve phosphorous knowledge and control phosphorous intake in CKD patients.