AIM:To assess the differences in average and sectoral peripapillary retinal nerve fiber layer(p RNFL)thickness using spectral domain optical coherence tomography(SD-OCT)in patients with non-arteritic anterior ischemic...AIM:To assess the differences in average and sectoral peripapillary retinal nerve fiber layer(p RNFL)thickness using spectral domain optical coherence tomography(SD-OCT)in patients with non-arteritic anterior ischemic neuropathy(NAION)compared with those with primary open angle glaucoma(POAG).METHODS:A comprehensive literature search of the Pub Med,Cochrane Library,and Embase databases were performed prior to October,2021.Studies that compared the p RNFL thickness in NAION eyes with that in POAG eyes with matched mean deviation of the visual fields were included.The weighted mean difference(WMD)with 95%confidence interval(CI)was used to pool continuous outcomes.RESULTS:Ten cross-sectional studies(11 datasets)comprising a total of 625 eyes(278 NAION eyes,347 POAG eyes)were included in the qualitative and quantitative analyses.The pooled results demonstrated that the superior p RNFL was significantly thinner in NAION eyes than in POAG eyes(WMD=-6.40,95%CI:-12.22 to-0.58,P=0.031),whereas the inferior p RNFL was significant thinner in POAG eyes than in NAION eyes(WMD=11.10,95%CI:7.06 to 15.14,P≤0.001).No difference was noted concerning the average,nasal,and temporal p RNFL thickness(average:WMD=1.45,95%CI:-0.75 to 3.66,P=0.196;nasal:WMD=-2.12,95%CI:-4.43 to 0.19,P=0.072;temporal:WMD=-1.24,95%CI:-3.96 to 1.47,P=0.370).CONCLUSION:SD-OCT based evaluation of inferior and superior p RNFL thickness can be potentially utilized to differentiate NAION from POAG,and help to understand the different pathophysiological mechanisms between these two diseases.Further longitudinal studies and studies using eight-quadrant or clock-hour classification method are required to validate the obtained findings.展开更多
[目的]基于MOD17A3数据研究陕北地区植被净初级生产力(NPP)。[方法]基于利用2000—2010年MOD17A3数据集的年均NPP数据和GIS技术定量分析了陕北植被NPP的时空变化特征。[结果]榆林市东南部及延安市中北部年平均NPP大部在151~250 g C/(m^2...[目的]基于MOD17A3数据研究陕北地区植被净初级生产力(NPP)。[方法]基于利用2000—2010年MOD17A3数据集的年均NPP数据和GIS技术定量分析了陕北植被NPP的时空变化特征。[结果]榆林市东南部及延安市中北部年平均NPP大部在151~250 g C/(m^2·a);延安市中南部年平均NPP大部在300 g C/(m^2·a)以上。延安、榆林市年NPP增加的面积都在90%以上,分别为92.9%、97.8%。2000与2010年的平均NPP相比,大部分地区是增加的,只有少部分地区是减少的。增加幅度在0~50 g C/(m^2·a)的地区为榆林市长城沿线一带,增加幅度在51~90 g C/(m^2·a)的地区为榆林市大部及延安市西北部,增加幅度在91~120 g C/(m^2·a)及>120 g C/(m^2·a)以上的主要分布在榆林市东南部及延安市中部;NPP降低的区域主要分布在延安市南部的桥山林区和黄龙林区。[结论]通过实施退耕还林等生态建设工程,陕北地区植被状况得到较好的改善。展开更多
基金Supported by National Natural Science Foundation of China(No.82070967No.81770930)+1 种基金National Natural Science Foundation of Hunan Province Grant(No.2020jj4788)China Hunan Provincial Science and Technology Department(No.2020SK2086)。
文摘AIM:To assess the differences in average and sectoral peripapillary retinal nerve fiber layer(p RNFL)thickness using spectral domain optical coherence tomography(SD-OCT)in patients with non-arteritic anterior ischemic neuropathy(NAION)compared with those with primary open angle glaucoma(POAG).METHODS:A comprehensive literature search of the Pub Med,Cochrane Library,and Embase databases were performed prior to October,2021.Studies that compared the p RNFL thickness in NAION eyes with that in POAG eyes with matched mean deviation of the visual fields were included.The weighted mean difference(WMD)with 95%confidence interval(CI)was used to pool continuous outcomes.RESULTS:Ten cross-sectional studies(11 datasets)comprising a total of 625 eyes(278 NAION eyes,347 POAG eyes)were included in the qualitative and quantitative analyses.The pooled results demonstrated that the superior p RNFL was significantly thinner in NAION eyes than in POAG eyes(WMD=-6.40,95%CI:-12.22 to-0.58,P=0.031),whereas the inferior p RNFL was significant thinner in POAG eyes than in NAION eyes(WMD=11.10,95%CI:7.06 to 15.14,P≤0.001).No difference was noted concerning the average,nasal,and temporal p RNFL thickness(average:WMD=1.45,95%CI:-0.75 to 3.66,P=0.196;nasal:WMD=-2.12,95%CI:-4.43 to 0.19,P=0.072;temporal:WMD=-1.24,95%CI:-3.96 to 1.47,P=0.370).CONCLUSION:SD-OCT based evaluation of inferior and superior p RNFL thickness can be potentially utilized to differentiate NAION from POAG,and help to understand the different pathophysiological mechanisms between these two diseases.Further longitudinal studies and studies using eight-quadrant or clock-hour classification method are required to validate the obtained findings.
文摘[目的]基于MOD17A3数据研究陕北地区植被净初级生产力(NPP)。[方法]基于利用2000—2010年MOD17A3数据集的年均NPP数据和GIS技术定量分析了陕北植被NPP的时空变化特征。[结果]榆林市东南部及延安市中北部年平均NPP大部在151~250 g C/(m^2·a);延安市中南部年平均NPP大部在300 g C/(m^2·a)以上。延安、榆林市年NPP增加的面积都在90%以上,分别为92.9%、97.8%。2000与2010年的平均NPP相比,大部分地区是增加的,只有少部分地区是减少的。增加幅度在0~50 g C/(m^2·a)的地区为榆林市长城沿线一带,增加幅度在51~90 g C/(m^2·a)的地区为榆林市大部及延安市西北部,增加幅度在91~120 g C/(m^2·a)及>120 g C/(m^2·a)以上的主要分布在榆林市东南部及延安市中部;NPP降低的区域主要分布在延安市南部的桥山林区和黄龙林区。[结论]通过实施退耕还林等生态建设工程,陕北地区植被状况得到较好的改善。
