[Relative factors effecting dietary quality of Chinese adults].

OBJECTIVE: To investigate the relative factors of dietary under and over intakes, then provide information for improving dietary quality of Chinese adults. METHODS: A Sample of 28320 adult aged 18 - 59 years who had completed 3 day dietary information and basic information were selected from 2002 National Nutrition and Health Survey. DBI - LBS (Dietary Balance Index Lower Bound Score) and DBI - HBS (Dietary Balance Index Higher Bound Score) were calculated to reflect the extent of under and over intake. Logistic multiple regression models were developed to identify factors characterizing under and over intake. Factors examined included the family characteristics and personal information. RESULTS: The main factors that effected dietary under intake were age, gender, educational level, employment, income, family number, hypertension, dyslipidemia, smoking, exercise, television viewing time, leisure reading time and domicile region, while gender, employment, income, family number, nation, diabetes, smoking, exercise, television viewing time, leisure reading time, cooking time, and domicile region were main factors that effected the dietary over intake of Chinese adults.