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为了解北京市人群膳食结构的变化趋势，我们分别于1988年和1996年秋季对样本人群（45～64岁男性）进行膳食调查，结果显示：1．膳食中蛋白质的人均摄入量增加了114克（P＜0.01），动物蛋白占总蛋白的百分比增加了4．9％，脂肪的摄入量增加了5．2克，多不饱和脂肪摄入量增加了5．2克（P＜0．01），碳水化合物的摄入量增加了1．5克，胆固醇的摄入量增加了61．8毫克，P／S比值由0．8增加到1.1。2．食盐的摄入量变化不大，1996年人均食盐摄入量为9．0克，钠／钾比值由1．9降至1．7。本结果表明，北京市人群膳食主要营养成分有利于心血管健康，但脂肪和胆固醇摄入增加，钠摄入量高仍不容忽视，在生活水平提高的情况下，还应当指导人们合理饮食。
To understand the changing trend of dietary patterns in Beijing, we conducted a dietary survey of the sample population (45-64 years old men) in 1988 and 1996 respectively. The results showed that: 1. Dietary protein intake per capita increased by 114 grams (P <0.01), animal protein accounted for 4.9% of total protein, fat intake increased by 5.2 grams, and polyunsaturated fat intake An increase of 5.2 grams (P <0.01), an increase of 1.5 grams of carbohydrate intake, an increase of 61.8 milligrams of cholesterol intake, and a P / S increase from 0.8 to 1.1.2. Salt intake did not change much in 1996, per capita salt intake of 9.0 grams, sodium / potassium ratio decreased from 1.9 to 1.7. The results show that the major nutritional components of Beijing’s population are conducive to cardiovascular health, but increased fat and cholesterol intake, high sodium intake can not be ignored, in the context of improved living standards, but also should guide people to a reasonable diet.