0211 Solar ultraviolet radiation (UVR) exposure levels and sun protection behaviours in outdoor workers in British Columbia, Canada
该研究测量了加拿大78名户外工作者夏季的紫外线暴露水平，发现全天户外工作者平均标准红斑剂量达2.6，超过70%的人去年夏天至少被晒伤一次，且工人更倾向用衣物防晒而非涂防晒霜或找阴凉。
<h3>Objectives</h3> The goal of this study was to measure outdoor workers’ exposure to solar UVR in a Canadian setting, and to examine their sun protection behaviours at work and leisure. <h3>Method</h3> Participants were recruited via trade unions and companies with outdoor operations. Workers wore an electronic dosimeter that measured UVR intensity once/minute for 5 working days and completed a questionnaire on skin cancer risk factors, sun protection behaviours, and job characteristics. Dosimeter data was converted to UVIndex and Standard Erythemal Dose (SED), an indicator for the potential for sunburn. <h3>Results</h3> Seventy-eight outdoor workers were recruited. The workers were largely male (95%), with a mean age of 38 years. Workers that reported the most outdoor working hours had the highest measured UVR exposure (mean SED of 2.6, >8 times the level of those reporting ≥1 outdoor hour). Workers who reported the most outdoor hours at work also reported the most outdoor hours at leisure. Over 70% of workers reported using sleeved shirts, hats, and sunglasses at work ‘often or always’. Sunscreen and shade-seeking were low, with 29% and 8% reporting these behaviours at work, respectively. Despite reasonable protective behaviours, 70% of workers reported ≥1 sunburn last summer; this climbed to 80% among those who worked outside all day. <h3>Conclusions</h3> Outdoor workers in Canada are at risk of high solar UVR exposure during the summer. They participate selectively in sun protective behaviours, opting more often for clothing protection than sunscreen or shade protection. Most experience acute damage from exposure (i.e. sunburn) despite attempting to protect themselves.