[Changes of dietary pattern among adults in Liaoning province, 1989 to 2006].

Objective: To study the changes of dietary pattern among adult residents in different areas of Liaoning province from 1989 to 2006.

Methods: Healthy adults (6213 subjects) at age of 18 - 65 years from 480 households in three cities (Shenyang, Yingkou, Wafangdian) and three counties (Qingyuan, Huanren, Chaoyang) were selected with stratified multiple cluster random sampling. The information on nutrient intake of the subjects were collected from datasets of Chinese Health and Nutrition Survey conducted in 1989, 1991, 1993, 2000, 2004, and 2006.