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用改进X线光密度法检测202例镉接触工人桡骨中远端1／3处骨矿含量，发现镉接触工人骨矿含量与对照组比显著下降（P＜0．01）。骨矿含量与尿镉、尿N-乙酰-β-D-氨基葡萄糖苷酶（NAG）呈负相关（P＜0.01），用骨指标＋肾指标诊断镉伤害“病人”，诊断特异度100％，误诊率为零。
Using the improved X-ray densitometry to detect the bone mineral content in the middle and distal 1/3 of the radial contact of 202 cadmium exposed workers, it was found that the bone mineral content of cadmium exposed workers decreased significantly compared with the control group (P <0.01). Bone mineral content was negatively correlated with urinary cadmium and urinary N-acetyl-β-D-glucosaminidase (NAG) (P <0.01). Patients with cadmium injury were diagnosed by using bone index and renal index. The diagnosis of 100% , Misdiagnosis rate is zero.