Socioecological approach on mechanism of generating OD children

近年来，我们可以观察到许多儿童的主观症状不明的直立失调综合征。从我们对日本和泰国儿童的长期和广泛的观察中，我们通过其筛查测试估计了OD的患病率。研究对象是日本和泰国的5万多名中小学生。调查的主要结果如下。我们发现吸毒过量的频率比20年前增加了很多。小学生OD患病率为3.0%，中学生为11% ~ 17%，OD阳性率存在较大的地区差异。可以认为，这种高OD阳性率对他们的生活方式影响不大。结果显示，儿童的生活方式对OD阳性率的影响较大，3.40%的被试在早晨出现了一些自主神经体征和症状。儿童的生活方式已经趋向于午夜模式的生活方式，这加速了他们的阳性OD率。

Recently we can observe many children suffering from Orthostatic Disregulation Syndrom with unidentified subjective symptoms. From our long range and wide scope observation on Japanese and Thai children, we have estimated the prevalence of OD by means of its screening test. The subjects were above 50,000 elementary and secondary school children in Japan and Thailand. The main findings of the survey were as follows.1. we found out that frequency of OD increased more than that of 20 years ago. The prevalence rate of OD was 3.0% in the elementary school and 11%-17% in secondary school students, and there were vast regiomal differences of OD positive rate. It may be supposed that this highly OD positive rate has quite a little influence on their life-style.2. According to the results, children's life-style made the great contribution to the OD positive rate.3.40% of subjects have shown some autonomic signs and symptoms in morning hours.4. Children's life-style has been incline to mid-night pattern of life-style and it accelerated their posittive OD rate.