有专家研究，平均年龄61.2岁的56例原因不明的严重耳聋患者，

                                                                   用微密度测量法测量骨萎缩程度。计算机定量评价7个参数后，53.6%

                                                                  呈现早期或进一步骨萎缩，提示相当多的老年患者血清钙浓度低于正常

                                                                 尿素氮浓度明显高于健康者，听敏度与血清碱性磷酸酶浓度间存在显著

                                                               正相关。认为由于肾功能障碍引起异常的维生素D代谢和异常的钙代谢可

                                                              作为老年性聋致病因素。

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