Feasibility Study of a Web-Based Automated Self-Administered 24-hour Dietary Recall (ASA 24) and a Physical Activity 24-hour Recall

In spite of long-standing hypothesis relating diet and physical activity to several cancers, diet and physical activity-cancer associations have been modest at best and often inconsistent in epidemiologic studies. Investigators around the world have become increasingly concerned that error in the measurement of both diet and physical activity is compromising our ability to detect these important but modest associations. Most commonly used diet and physical activity assessment methods have been based on a relatively small set of questions (e.g. 124 food items consumed or 5-10 physical activities in the past 12 months). Recent developments in computer technology provide an opportunity to use internet-based instruments to assess an individual s diet and physical activity more accurately and cost effectively.

Sex

All

Minimum age

50 Years

Maximum age

75 Years

* We will recruit 5,000 subjects from the existing NIH-AARP study participants who are currently 62 to 83 years old. To include individuals who are at least 50 years old, we will expand our recruitment effort to 10,000 new AARP members who are at least 50 years old and not currently NIH-AARP study cohort members. We will target individuals residing in one of the following states: Florida; Pennsylvania; New Jersey; Louisiana; North Carolina; California; Detroit; Michigan; and Atlanta, Georgia, Nevada, Arizona, Texas, Illinois, Washington, Wisconsin, Colorado, Connecticut, Kentucky, Utah and Massachusetts (subject to change due to availability of high-quality state cancer registries). The names and addresses of new AARP members will be provided by AARP.