Objective To show the distribution of facial exposure to non-melanoma biologically effective UV irradiance changes by rotation angles. Methods This study selected the cheek, nose, and forehead as representative facial sites for UV irradiance measurements, which were performed using a rotating manikin and a spectroradiometer. The measured UV irradiance was weighted using action spectra to calculate the biologically effective UV irradiances that cause non-melanoma （UVBEnon.rnel） skin cancer. The biologically effective UV radiant exposure （HBEnon-mel） was calculated by summing the UVBEnon-mel data collected over the exposure period. Results This study revealed the following： （1） the maximum cheek, nose and forehead exposure UVA and UVB irradiance times and solar elevation angles （SEA） differed from those of the ambient UV irradiance and were influenced by the rotation angles; （2） the UV irradiance exposure increased in the following order： cheek 〈 nose 〈 forehead; （3） the distribution of UVBEnon-mel irradiance differed from that of unweighted UV radiation （UVR） and was influenced by the rotation angles and exposure times; and （4） the maximum percentage decreases in the UVBEnon-melradiant exposure for the cheek, nose and forehead from 0° to 180° were 48.41%, 69.48% and 71.71%, respectively. Conclusion Rotation angles relative to the sun influence the face＇s exposure to non-melanoma biologically effective UV.
WANG FangYU Jia MingYANG De QiGAO QianHUA HuiLIU Yang
目的探讨不同海拔的西昌和绍兴地区眼部暴露生物有效紫外辐射强度的差异,为眼紫外线防护提供依据。方法采用自行研制的旋转式眼紫外线暴露模型,在晴好天气下,分别在西昌和绍兴进行监测。运用AvaSoft 7.4 for USB2软件和OriginPro 8.0软件进行数据分析和处理。结果西昌和绍兴眼部生物有效紫外辐射暴露强度的日间变化呈双峰分布,西昌角膜、结膜和晶状体的加权UVBE最大值分别是绍兴的1.7倍、近2倍和1.8倍。相同太阳高度角下,西昌角膜、结膜、晶状体生物有效强度均高于绍兴。结论不同海拔两地区的眼部生物有效暴露强度的日间变化均呈双峰分布。相同太阳高度角下,其角膜、结膜和晶状体的生物有效紫外线强度存在明显差异,西昌均高于绍兴。
目的了解不同海拔的西昌和绍兴地区眼紫外线暴露强度的日间分布及随太阳高度角变化的差异。方法采用自行研制的眼紫外线暴露模型,在晴好天气下,分别在西昌和绍兴地区进行监测。监测的数据运用Ava Soft 7.4 for USB2软件和Origin Pro 8软件进行数据处理和分析。结果最大暴露状态下,西昌和绍兴地区眼紫外线A段(UVA)和紫外线B段(UVB)日间分布均呈双峰型,峰值UVA分别为2 181.91μW/cm^2和2 003.6μW/cm^2;UVB分别为117.2μW/cm^2和72μW/cm^2;眼部和环境暴露比表明,在最大暴露状态下,西昌和绍兴地区UVA基本相近,分别为0.79和0.80,而UVB西昌大于绍兴,分别为0.68和0.55。结论西昌和绍兴地区眼部UVA与UVB最大暴露强度的日间变化呈双峰型分布;相同太阳高度角下,眼部UVB暴露强度西昌高于绍兴,眼部UVB与环境UVB暴露比西昌亦大于绍兴。
目的:通过荟萃分析评价我国人群白内障与高血压的相关关系。方法:应用PubMed,Web of Knowledge,万方和CNIK数据库对以中英文全文发表的研究进行检索,将入选研究的数据整合,进行随机效应模型的荟萃分析,并按纬度、样本量进行亚组分析和敏感性分析。结果:208个备选研究中,包含3247例白内障患者的7个研究最终入选。随机效应模型合并比值比(OR值)为1.20(95%CI,1.01～1.38),说明我国人群白内障的患病风险与高血压有关。且纬度和样本量的亚组分析结果显示,纬度是研究间变异来源。敏感性分析表明合并OR值保持稳定。结论:荟萃分析结果提示高血压能提高我国人群白内障的患病风险。
