Familusi J B, Adamolekun B, Olayinka B A, Muzengi D, Levy L F
Department of Paediatrics, University of Zimbabwe, Harare, Zimbabwe.
Ann Trop Paediatr. 1998 Dec;18(4):267-74. doi: 10.1080/02724936.1998.11747958.
To clarify the factors associated with electroencephalographic (EEG) photosensitivity, the records of patients who had EEG examinations in the city of Harare, Zimbabwe between 1968 and 1996 were studied. EEG photosensitivity was confirmed in 107 of a total of 9082 youths (aged 0-25 years), giving an overall photosensitivity prevalence of 1.17% in the study population. Photosensitivity occurred more frequently in females than in males, and the peak age period for its occurrence was during adolescence. A significantly higher prevalence of photosensitivity was recorded among Whites and Asians than among Blacks, while the Coloured population had an intermediate prevalence. The monthly and seasonal incidence of photosensitivity in the present study showed no correlation with the prevailing mean monthly or seasonal temperatures, sunshine duration and sunlight intensity in Harare during the period covered by the study. These findings indicate that sunshine-related factors do not play a dominant role in the occurrence of photosensitivity, thereby negating previous opinions which attributed the relative rarity of photosensitivity in black Africans to high levels of exposure to sunshine in tropical Africa. Our findings therefore corroborate the view that photosensitivity depends primarily on genetic rather than environmental factors.
为了阐明与脑电图（EEG）光敏感性相关的因素，对1968年至1996年间在津巴布韦哈拉雷市接受脑电图检查的患者记录进行了研究。在总共9082名年轻人（年龄在0至25岁之间）中，有107人被确认存在脑电图光敏感性，研究人群中的总体光敏感性患病率为1.17%。光敏感性在女性中比在男性中更频繁出现，其发生的高峰年龄阶段是青春期。白人及亚洲人的光敏感性患病率显著高于黑人，而有色人种的患病率处于中间水平。本研究中光敏感性的月度和季节发病率与研究期间哈拉雷的月平均温度或季节温度、日照时长以及阳光强度均无相关性。这些发现表明，与阳光相关的因素在光敏感性的发生中并不起主导作用，从而否定了之前将非洲黑人中光敏感性相对罕见归因于热带非洲高日照水平的观点。因此，我们的研究结果证实了光敏感性主要取决于遗传而非环境因素这一观点。
