Objective To explore the advantage of dyspnea differentiation index ( DDI ) for separation of cardiac vs pulmonary dyspnea.

目的　探讨气急鉴别指数 ( dyspneadifferentiationindex, DDI ) 判别肺源性呼吸困难与心源性呼吸困难的优越性.

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Objective To study the expression and significance of dihydrodiol dehydrogenase 1 ( DDI ) in prostate cancer.

目的探讨二氢二醇脱氢酶 ( DDI ) 在前列腺癌中的表达及意义.

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Results The magnitude of the DDI was negatively correlated with the severity of the clinical manifestations.

结果　DDI的大小与COPD患者 的病情改善呈明显的负相关.

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