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为了提高人民的健康水平,保护人民的视力,为防盲工作提供科学依据,1986年12月至1987年5月我们在全省范围内进行了眼病抽样调查。 1 对象和方法 根据文献资料几种主要眼病的患病率,将允许误差控制在0.15％～0.5％,根据公式:n(U_α/δ)~2P(1-P)计算,需要调查1万人。将全省分成城市、湖区、山区、半山区、丘陵等5个层次,然后在各层进行整群抽样。 1.1 对象 以调查点的常住户口为对象。
In order to improve people’s health, protect people’s eyesight and provide a scientific basis for preventing blind work, we conducted a sample survey of eye diseases across the province from December 1986 to May 1987. 1 Subjects and methods According to the prevalence of several major eye diseases in the literature, the allowable error is controlled at 0.15% to 0.5%, according to the formula: n (U_α / δ) ~ 2P (1-P) . The province is divided into five levels, namely, cities, lakes, mountains, mid-levels and hills, and then cluster sampling at all levels. 1.1 object to the investigation point of permanent residence for the object.