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1985年对该县城关内普通中小学生1653人沙眼患病率调查为35.15%,男女生无显著差别,随年龄增长而上升,以13岁组为最高
In 1985, the prevalence of trachoma in 1653 ordinary primary and secondary school students in the county seat was 35.15%. There was no significant difference between boys and girls, with the increase of age, the highest was 13-year-old group