临床症状对深静脉血栓的阳性预测值为52%。

The positive predictive value of clinical signs was 52%.

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尽管如此，MPI中重度受损患者的阳性预测值仅12%。

Nevertheless, the positive predictive value of having moderate or large MPI defects was only 12%.

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这三种因子的联合试验对心脏事件的阳性预测值是42.9%。

The positive predictive value of serial test of three factors to cardiac events was 42.9%.

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