Correlation analysis between brucellosis and natural environmental factors in Ningxia Hui autonomous region from 2012 to 2016
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摘要:
目的 探讨宁夏回族自治区(宁夏)各县(区)2012-2016年人间布鲁菌病(brucellosis, 简称布病)与自然环境因素间的相关性, 为早期采取相应的防治措施提供参考依据。 方法 收集2012-2016年宁夏疾病预防控制中心法定报告传染病数据库中人布病发病数资料, 采用Spearman相关性分析探索人间布病发病率与自然环境因素间的相关性, 同时采用ArcGIS 10.6软件来直观表达布病与各影响因素间的相关性。 结果 2012-2016年宁夏布病发病数由449例增加至2 160例。研究发现布病发病率与风速、耕地面积以及草地面积存在正相关关系(均有P < 0.05), 应用ArcGIS 10.6软件绘制出的图形, 更直观的表达出了与Spearman相关性分析结果相同。 结论 人间布病与风速、耕地面积以及草地面积具有一定的相关关系, 因此了解人间布病的影响因素, 掌握相应自然环境因素变化的趋势, 有利于对该疾病未来的发生发展状况进行预测, 从而对布病的早期预警具有一定的意义。 -
关键词:
- 布鲁菌病 /
- 地理信息系统 /
- Spearman相关性分析 /
- 自然环境因素
Abstract:Objective To explore the correlation between brucellosis and natural environmental factors in Ningxia from 2012 to 2016, so as to provide reference for early prevention and control measures. Methods The epidemic situation of human brucellosis in the statutory report infectious disease database of Ningxia center for disease control and prevention were collected from 2012 to 2016, and the correlation between brucellosis and natural environmental factors was analyzed by Spearman correlation. Meanwhile, ArcGIS 10.6 software was used to intuitively express the correlation between brucellosis and various influencing factors. Results From 2012 to 2016, the incidence of brucellosis in Ningxia increased from 449 cases to 2 160 cases. In the correlation analysis, it was found that there was a positive correlation between brucellosis incidence and wind speed, cultivated land area and grassland area(all P < 0.05). The graphics drawn by ArcGIS 10.6 software more intuitively expressed the same results as spearman's. Conclusions Human brucellosis is related to wind speed, cultivated land area and grassland area. Therefore, understanding the correlation between human brucellosis and related factors, and mastering the change trend of the corresponding natural environmental factors are conducive to the prediction of the future occurrence and development of the disease, which has certain significance for the early warning of brucellosis. -
表 1 2012-2016年宁夏22县(区)人间布病发病率与自然环境因素相关分析
Table 1. Correlation analysis of brucellosis incidence and natural environment factors in 22 counties of Ningxia from 2012 to 2016
因素 r P值 平均气温(℃) 0.168 0.455 最高气温(℃) 0.119 0.599 最低气温(℃) 0.111 0.624 降水量(mm) - 0.050 0.824 日照时数(h) 0.309 0.162 风速(m/s) 0.673 0.001 耕地面积(hm2) 0.564 0.006 森林面积(hm2) 0.364 0.096 草地面积(hm2) 0.750 < 0.001 表 2 各自然地理环境因素间的交互作用
Table 2. Interaction among physical and geographical environment factors
变量 平均气温(℃) 最高气温(℃) 最低气温(℃) 降水量(mm) 日照时数(h) 风速(m/s) 耕地面积(hm2) 森林面积(hm2) 草地面积(hm2) 平均气温(℃) 1.000 最高气温(℃) 0.822a 1.000 最低气温(℃) 0.531a 0.370 1.000 降水量(mm) -0.689a - 0.604a -0.378 1.000 日照时数(h) 0.642a 0.515a 0.241 -0.621a 1.000 风速(m/s) 0.005 - 0.146 0.045 0.016 0.401 1.000 耕地面积(hm2) -0.322 - 0.389 -0.041 0.348 -0.250 0.426a 1.000 森林面积(hm2) -0.646a - 0.675a -0.390 0.754a -0.425a 0.355 0.709a 1.000 草地面积(hm2) 0.043 0.004 0.118 -0.187 0.320 0.555a 0.516a 0.259 1.000 注:a表示P < 0.05。 表 3 主成分提取信息表
Table 3. Principal component extraction information table
成分 初始特征值 提取平方和载入 特征值 方差百分比 累积方差百分比 特征值 方差百分比 累积方差百分比 1 4.366 48.512 48.512 4.366 48.512 48.512 2 1.978 21.973 70.485 1.978 21.973 70.485 3 0.976 10.844 81.329 4 0.670 7.444 88.774 5 0.458 5.089 93.862 6 0.374 4.157 98.019 7 0.095 1.060 99.079 8 0.059 0.654 99.733 9 0.024 0.267 100.00 表 4 成分矩阵信息表
Table 4. Information table of component matrix
气象因素 成分 1 2 最高气温(℃) 0.921 0.144 最低气温(℃) 0.466 -0.136 平均气温(℃) 0.893 0.068 降水量(mm) -0.909 -0.130 日照时数(h) 0.881 0.317 风速(m/s) 0.064 0.797 耕地面积(hm2) -0.464 0.648 森林面积(hm2) -0.825 0.381 草地面积(hm2) 0.047 0.785 表 5 宁夏布病发病率相关影响因素模型拟合表
Table 5. Model fitting table of related influencing factors of brucellosis incidence in Ningxia
变量名 β值 Sx S(β) t值 P值 常量 49.296 9.509 - 5.184 < 0.001 Factor1 -3.283 9.733 -0.055 -0.337 0.740 Factor2 42.048 9.733 0.703 4.320 < 0.001 -
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