Gissel S, Mortensen J T, Juul S
Aalborg Sygehus, forskningsenheden for klinisk epidemiologi.
Ugeskr Laeger. 2000 Oct 16;162(42):5619-22.
School health records for a group of Danish school children, who started school in 1977, 1987 and 1997, were studied in order to evaluate hearing ability at the time of starting school and leaving school. One thousand, six hundred and five children who were evaluated by audiometry were included in the study. We found a higher prevalence of hearing loss in children who started school in 1987 and 1997 compared to those who started in 1977. The typical hearing loss was in the high frequencies. At the end of school the hearing ability of children who had started school in 1977 was just as poor as of that of those who had started in 1987. Whether this hearing loss may lead to poorer learning capacities in the afflicted children should be evaluated by further studies that include information on exposure to noise.
对一组分别于1977年、1987年和1997年开始上学的丹麦学童的学校健康记录进行了研究，以评估入学时和毕业时的听力。该研究纳入了1605名接受听力测定评估的儿童。我们发现，与1977年开始上学的儿童相比，1987年和1997年开始上学的儿童听力损失患病率更高。典型的听力损失发生在高频。在毕业时，1977年开始上学的儿童的听力与1987年开始上学的儿童一样差。这种听力损失是否会导致患病儿童的学习能力下降，应通过包括噪声暴露信息的进一步研究来评估。
