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趋势面分析是多元回归分析理论为基础的一种估计分析方法。它从整体出发，分析疾病地理分布系统和局部变异。趋势分析图是根据最小二乘法原理，剔除局部和随机变民的影响后求得的趋势面，能较准确地反映疾病地区分布总的变化规律。湖南省出生缺陷监测工作开展已逾六年，监...
Trend surface analysis is an estimation analysis method based on multiple regression analysis theory. It starts from the whole and analyzes the geographic distribution system of diseases and local variations. The trend analysis chart is based on the principle of least squares, removes the trend surface obtained after the influence of local and random change of people, and can more accurately reflect the general variation of the distribution of disease areas. The monitoring of birth defects in Hunan Province has been carried out for more than six years.