Diet and Nutrition Pilot Study for Chinese Adolescents and Their Mothers

Background: \- Researchers want to collect information on diet, physical activity, and sun exposure in children and young adults. The data can provide information on the effect these factors might have on the development of cancer and other diseases. Information collected only from adults does not accurately measure these factors. To collect more accurate information, both mothers and children will provide information. Study participants will be from Hebei province in northeastern China and Jiangsu province in eastern China. Objectives: \- To collect and study diet, activity, and sun exposure data from Chinese adolescents and their mothers. Eligibility: * Adolescents between 15 and 17 years of age from Hebei and Jiangsu provinces in China. * Mothers of the study adolescents. Design: * Participants will answer questions about their diet, physical activity, and time in the sun. * Participants will wear a pedometer to measure activity for 7 days. They will also wear a badge to measure sun exposure for 3 days. * Participants will record their activities and food and drinks consumed for 3 days. Urine samples will be collected for a full day. * Participants will have a grip strength test. On the last day of the study, they will provide blood, saliva, and toenail samples. * A smaller separate group of adolescents will provide saliva samples only and complete a food questionnaire.

Sex

All

Minimum age

15 Years

Maximum age

45 Years

* INCLUSION CRITERIA:

Pairs of mothers and their children 15 - 17 years of age who completed Task1 and who agree to participate in the study (Task2 ).

EXCLUSION CRITERIA:

1. Maternal pill usage only after conception and those who may have stopped taking folic acid pills before the second trimester.
2. Pairs of mothers and children where the mother is not the primary guardian (e.g., mother died or never lived with the child).