Health Analysis Division, Statistics Canada, Ottawa, Ontario.
Environment and Climate Change Canada, Toronto, Ontario.
Health Rep. 2017 May 17;28(5):12-19.
Ultraviolet radiation (UVR) exposure and a history of sunburn are important risk factors for skin cancer. Sunburn is more common among men, younger age groups, and people in higher income households. Sun protection measures also vary by sex, age, and socioeconomic characteristics. Associations between ambient UVR and sunburn and sun safety measures have not been quantified.
A total of 53,130 respondents aged 18 or older answered a Canadian Community Health Survey (CCHS) module on sun safety, which was administered in six provinces from 2005 to 2014. The module contained questions about sunburn, time in the sun, and sun protection. These respondents were linked to an ambient erythemal UVR dataset representing the June-to-August mean. Descriptive statistics and logistic regression were used to examine associations between population characteristics, sunburn, sun safety, time in the sun, and ambient UVR.
Sunburn was reported by 33% of respondents and was more common among men, younger age groups, people who were not members of visible minorities, residents of higher income households, and individuals who were employed. On a typical summer day, a larger percentage of women than men sought shade and wore sunscreen, whereas a larger percentage of men wore a hat or long pants. As ambient summer UVR increased, women were more likely to apply sunscreen to their face, seek shade, or wear a hat (OR~1.02 to 1.09 per increase of 187 J/m² of erythemally-weighted UVR, or 5.4% of the mean); these associations were not observed among men.
Findings related to sunburn and sun protection were similar to those of previous studies. The association between ambient UVR and women's precautionary measures suggests that information about UVR may influence their decision to protect their skin.
紫外线（UVR）暴露和晒伤史是皮肤癌的重要危险因素。晒伤在男性、年轻人群和高收入家庭中更为常见。防晒措施也因性别、年龄和社会经济特征而异。环境 UVR 与晒伤和防晒措施之间的关联尚未量化。
共有 53130 名年龄在 18 岁或以上的受访者回答了加拿大社区健康调查（CCHS）的一个关于防晒的模块，该模块于 2005 年至 2014 年在六个省份进行。该模块包含关于晒伤、晒太阳时间和防晒措施的问题。这些受访者与一个代表 6 月至 8 月平均水平的环境红斑 UVR 数据集相关联。使用描述性统计和逻辑回归来检查人口特征、晒伤、防晒、晒太阳时间和环境 UVR 之间的关联。
33%的受访者报告有晒伤，男性、年轻人群、非少数族裔、高收入家庭居民和就业人员更为常见。在典型的夏日，女性比男性更有可能寻找阴凉处和涂抹防晒霜，而男性则更有可能戴帽子或穿长裤。随着夏季环境 UVR 的增加，女性更有可能在脸上涂抹防晒霜、寻找阴凉处或戴帽子（每增加 187 J/m² 红斑加权 UVR，或 5.4%的平均值，OR 值为 1.02 至 1.09）；而这些关联在男性中并未观察到。
与晒伤和防晒有关的发现与以前的研究相似。环境 UVR 与女性预防措施之间的关联表明，有关 UVR 的信息可能影响她们保护皮肤的决策。
