Department of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California, Los Angeles, California.
Department of Pediatrics, University of Utah, Salt Lake City, Utah.
Photochem Photobiol. 2023 May-Jun;99(3):1037-1046. doi: 10.1111/php.13687. Epub 2022 Sep 13.
Melanoma incidence is increasing, with poor prognosis cases growing faster in California Hispanics than in non-Hispanic whites. Ultraviolet Radiation (UVR) exposure as a child has been found to disproportionately increase the risk of melanoma. To determine correlates of UVR exposure in this high-risk population, we conducted a study in predominately Hispanic 4th and 5th grade classrooms in Los Angeles County, a high UVR environment, during the spring. To address potential reporting bias, electronic UV dosimeters were utilized to objectively measure the association between UVR exposure and constructs (acculturation, sun protective behavior and knowledge, family interventions) obtained on baseline questionnaires (n = 125). Tanning attitude (wanting to get a tan) was associated with lower median time spent outside (1.73 min versus 22.17, AUC 82.08, Sensitivity 0.78, Specificity 0.73) and standard erythemal dose (SED) on weekends, but positively associated with sun protective knowledge. Sun protective knowledge and family discussion of sunscreen were also inversely associated with objectively measured time outside. Students spent a median 30.61 (IQR 19.88) minutes outside per day (SED 0.30, IQR 0.20), with only 35.70% of it occurring in nonschool hours. We determined the majority of UVR exposure in this population occurs at school, providing valuable guidance for future interventions.
黑色素瘤发病率正在上升，加利福尼亚州西班牙裔人群中预后不良的病例增长速度快于非西班牙裔白人。研究发现，儿童时期暴露于紫外线辐射（UVR）会不成比例地增加患黑色素瘤的风险。为了确定这一高风险人群中 UVR 暴露的相关因素，我们在洛杉矶县的 4 至 5 年级西班牙裔主要班级中进行了一项研究，该地区 UVR 环境较高，研究时间在春季。为了解决潜在的报告偏差问题，我们使用电子紫外线剂量计客观地测量了 UVR 暴露与基线问卷中获得的结构（文化适应、防晒行为和知识、家庭干预）之间的关联（n=125）。晒黑态度（想要晒黑）与周末户外活动时间中位数（1.73 分钟对 22.17 分钟，AUC 82.08，敏感性 0.78，特异性 0.73）和标准红斑剂量（SED）呈负相关，但与防晒知识呈正相关。防晒知识和家庭讨论防晒霜也与客观测量的户外活动时间呈负相关。学生每天户外活动的中位数时间为 30.61 分钟（IQR 19.88）（SED 0.30，IQR 0.20），其中只有 35.70%发生在非上课时间。我们确定该人群的大部分 UVR 暴露发生在学校，为未来的干预措施提供了有价值的指导。
