Socioecological Study on Symptom of Children's OD

本研究估计了日本和泰国OD儿童的阳性率，证明了OD筛查试验的可靠性（采用典型判别函数分析），并讨论了社会生态条件对OD患病率的影响.泰国儿童OD的总患病率男孩为18.8%，女孩为25.9%。男孩12岁起的最高比率为40.9%，女孩15岁起的最高比率为40.0%。日本儿童的患病率低于泰国儿童。发现OD患病率较20年前有明显上升.随着年级的升高，患病率有升高的趋势.典型判别函数分析结果证明OD筛选试验是可靠的.城市儿童的生活方式已趋向于“夜间行为”，这种生活方式导致日本和泰国城市儿童OD的高患病率。

We have studied to estimate a positive rate of OD children of Japan and Thailand and proved a reliability of OD screening test (using the canonical discriminant function analysis) , and discussed an influence of socioecological condition on OD prevalence.1. Total prevalence rates of OD of Thai children are 18.8% in boys and 25.9% in girls. The heighest rates are 40.9% from 12 years in boys and 40.0% from 15 years in girls. Japanese children's prevalence rates are lower than those of Thai children.2. We found out that the prevalence rate of OD increased more than that of 20 years ago.3. According to the advance of school grade, the prevalence rates tend to increase highly.4. The results of canonical discriminant function analysis proved that the OD screening test is reliable.5. Children's lifestyle in urban area have been tending toward a "Night oriented behavior" and its lifestyle cause a high prevalence rate of OD to children of Japan and in urban area of Thailand.