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1.
出生缺陷地区聚集性的相应分析   总被引:11,自引:1,他引:10  
相应分析是因子分析的扩展,主要用于分析二维数据阵的行因素与列因素之关系。本文介绍了相应分析的基本思想,并对1990年全国七种主要出生缺陷的地区聚集性进行了分析。相应分析的结果将我国分为南方和北方,指出出生缺陷在我国存在着地区性差异,南方以CLP为主,北方以NTD为主。而这里南方与北方的分割恰与北纬35度很接近。  相似文献
2.
河南省鲁山县2010年重症手足口病空间聚集性分析   总被引:2,自引:0,他引:2  
手足口病发病时间存在季节性变化,但有地区差异[1].进行重症手足口病空间分布特征的分析和研究有利于更好掌握重症病例的地理分布特征与规律,为此本研究对2010年河南省报告重症病例最多的鲁山县的病例空间分布聚集性进行了分析,现将结果报道如下.  相似文献
3.
在疾病的空间聚集性研究中,如果遇到人口分布情况不明,常使分析结果难以断论。排列检验(permutationtest)可作为一种在人口分布未知情况下的疾病空间聚集性检验。它以随机样本的分布作为理论分布,判断病例组的情况是否在理论分布的小概率区域内,从而得出有无疾病空间聚集性的结论。  相似文献
4.
目的了解山西省吕梁市出生缺陷的空间分布特征及与社会经济的关系。方法收集山西省吕梁市出生缺陷的调查资料,进行地理信息系统(GIS)空间分析,并对研究区域出生缺陷发病率进行空间集聚性研究。应用主成分分析对社会经济进行综合评价,并与出生缺陷发病率进行相关分析。结果吕梁市出生缺陷高发于本地区中部,存在空间集聚的特点[Z(BW)=6.84909〉1.96];尚未发现本地区出生缺陷发病率与经济有关r=0.175(P=0.587)。结论用GIS技术分析山西省吕梁市出生缺陷与经济状况没有关系。  相似文献
5.
目的探讨Knox方法在传染病时空聚集性探测中的应用。方法介绍Knox方法的原理,以2005年45月北京市流行性脑脊髓膜炎(流脑)病例为例,介绍其统计分析过程并解释结果。结果在选定时间临界值13d和空间临界值29.67km时,流脑可能存在时空聚集性。选取其他时间和空间临界值,均无时空聚集性。结论在根据传染病的特点并选择合适的时间与空间临界值的条件下,Knox方法能够较好地探测传染病的时空聚集性,对原因不明的疾病可以根据不同的临界时间和临界空间“诊断”其是否有传染性,因此对传染病早期预警有一定作用。  相似文献
6.
Objectives Evidence suggests that there is geographical variation in the birth prevalence of both cryptorchidism and hypospadias. The aim was to determine if there is evidence of spatial heterogeneity in the prevalence of these conditions and to test the hypothesis that environmental factors may contribute to aetiology. Methods A population-based dataset of cryptorchidism and hypospadias cases was constructed from the hospital episodes statistics that covered the Northern Region of England and assigned to a small area based on the residential address at time of admission. Expected numbers of cases for each small area were computed. The ratio of observed to expected cases was determined for each small area and analysed with respect to both geographical heterogeneity and small area level socio-economic deprivation. The Potthoff–Whittinghill method was used to determine if there was localized spatial clustering of cases. Results There was statistically significant spatial clustering for cases of both cryptorchidism [estimated Extra-Poisson Variation (EPV) = 0.14; 95% CI, 0.03–0.25] and hypospadias (EPV = 0.17; 95% CI, 0.05–0.28). In addition, increased prevalence was associated with lower levels of deprivation for hypospadias (P = 0.06), but there was no such relationship for cryptorchidism (P = 0.61). Conclusions The finding of localized spatial heterogeneity in the prevalence of cryptorchidism and hypospadias is consistent with the involvement of a spatially varying environmental risk factor. The apparent social patterning of hypospadias is likely to reflect an association with lifestyle and other factors which underpin social variation in health. However, there also remains a possibility that these findings may be due to variability in ascertainment of cases.  相似文献
7.
The distribution of active trachoma in Kahe Mpya, Tanzania, an endemic village of approximately 1000 people, was mapped spatially and analysed for associated risk factors and evidence of clustering. An association between distance to water source and active disease was demonstrated, although this was reduced after accounting for the lack of independence between cases in the same household. Significant clustering of active trachoma within households was demonstrated, adding support to the hypothesized importance of intra-familial transmission. The spatial distribution of trachoma was analysed using the spatial scan statistic, and evidence of clustering of active trachoma cases detected. Understanding the distribution of the disease has implications for understanding the dynamics of transmission and therefore appropriate control activities. The demonstrated spatial clustering suggests inter-familial as well as intra-familial transmission of infection may be common in this setting. The association between active trachoma and geographical information system (GIS) measured distance to water may be relevant for planning control measures.  相似文献
8.
A space-time analysis of clustering among 78 definite CJD cases who died in Slovakia (75) and an adjacent part of Hungary (3) during 1972 -1991 is presented. Two geographical rural accumulations of sporadic and familial CJD patients in the north and south of Central Slovakia were found. There was evidence of two significant clusters when spatial and temporal neighborhoods were defined by distances of 2,4,5 and 7 km within 1.5 and 2 years. Involvement of genetic mechanisms in the clusters was demonstrated, and the possible role of environmental (zoonotic) risk factors are considered.  相似文献
9.
目的 描述全国肺结核病的流行病学特征及空间分布规律,为决策者制定防治策略及防范重点、合理分配卫生资源等提供科学依据.方法 从中国CDC法定报告传染病数据库获取全国2004-2012年肺结核病的疫情资料,采用描述性流行病学、季节指数法以及时空重排扫描统计方法对数据进行分析.结果 累计报告肺结核病9 663 729例,年均报告率为81.46/10万,其中2005年最高,为96.88/10万.10岁以下的婴幼儿及儿童肺结核发病水平最低,年均报告率为5.12/10万;60岁以后迅速上升,年均报告率>150/10万.结核病流行期为1-6月(季节指数均>1),高峰期为1月和3月.全国共检测到7个时空聚集区,且均发生在2005-2008年,其中重症一类聚集覆盖地区为重庆、贵州及广西.结论 中老年为结核病重点防治人群;东部、中部、西部地区肺结核病流行强度不同,但各地区该病季节性变化规律基本相同.  相似文献
10.
目的利用地理信息系统(GIS)技术探索深圳市肾综合征出血热(HFRS)的空间分布特征。方法搜集整理2005-2011年现住址在深圳市的203名HFRS病例数据,运用Mapinfo9.5分别在不同的时空尺度上与数字地图建立空间关联,建立HFRS地理信息数据库,利用GeoDa0.95i分析55个街道HFRS发病率分布的空间自相关性。结果 2006、2008、2009、2011年以及2005-2011年平均的全局Moran′s I系数分别为0.3096、0.1212、0.1970、0.1238、0.2800,P<0.05(分别为0.002、0.048、0.012、0.045、0.002);一、二季度全局Moran′s I系数分别为0.1895、0.3070,P<0.05(分别为0.012、0.002)。局部自相关系数大于1的地区包含南头、南山、西丽、笋岗、东晓、翠竹、清水河等7个街道,分别为1.9683、1.8611、1.6789、1.5616、1.3067、1.2475、1.0487,这些街道是深圳市HFRS发病率的高聚集区域。结论通过建立HFRS空间地理信息数据库,运用空间自相关分析能及时发现疾病的聚集情况,确定高发和危险地区。  相似文献
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