中国八省同一家庭内营养不良与营养过剩个体并存的纵向趋势研究

目的描述和解释中国八省1991～2000年营养不良、营养过剩个体在同一家庭内并存的纵向趋势及主要影响因素。方法采用"中国居民健康与营养调查"项目1991、1993、1997、2000年的调查数据。以住户为研究对象,按照0～60岁家庭成员的营养状况将住户分为正常家庭、营养不良家庭、营养过剩家庭、营养不良和营养过剩并存家庭四个类型。并存发生的纵向影响因素分析采用多水平模型。结果中国八省四年的调查住户并存率分别为7.9%、7.7%、6.0%、6.8%,随年代变化呈下降趋势(Z=2.54,P=0.0112)。1991～2000年期间,城市居住、机动车拥有、洗衣机拥有对并存的发生有持续促进作用。结论中国营养不良和营养过剩并存家庭的出现是营养状况变迁的特征之一。营养改善等项目要兼顾营养不良成员与营养过剩成员并存的复杂现实。

THE LOGNITUDINAL STUDY OF UNDERNUTRITION AND OVERNUTRITION COEXISTENCE WITHIN THE SAME HOUSEHOLD IN CHINA

Objective To describe the longitudinal trend of undernutrition and overnutrition coexistence within the same household among 8 provinces in 1991～2000 and to define their association with the key socio-demographic-economic,dietary and environment factors. Methods Analysis was based on data of the China Health and Nutrition Survey,an ongoing longitudinal project in 1991,1993,1997 and 2000. All households were categorized as four types:undernutrition/ overnutrition,undernutrition,overnutrition and normal by the individuals under 60 years old. Multilevel model was used to explore the likely factors in 10 years. Results The incidence of under-and overnutrition coexistence in 1991,1993,1997 and 2000 was 7.9%,7.7%,6.0%,6.8%,respectively. Dual burden households were decreasing (Z=2.54,P=0.0112). Multilevel model analysis showed that urban inhabitancy,owing motor vehicle and washing machine had persistent effect to coexistence of undernutrition/ overnutrition individuals within the same household. Conclusion Undernutrition and overnutrition coexistence within the same household is one of the characteristics of Chinese nutrition transition. The nutrition improvement program in the same household should be paid attention to both situations.