The positive predictive values (PPV) of the PCR and virus isolation assessments performed in all 50 pregnancies (51 gestational sacs) were 92% and 93.7%, respectively.
聚合酶链反应和病毒分离培养法对50例孕妇（怀51胎）进行评价的阳性预测值分别为92.0%和93.7%。
The semiquantitative slide agglutination and single-tube Widal tests had positive predictive values (PPVs) of 25.0% (95% confidence interval, CI: 0.6–80.6) and 20.0% (95% CI: 2.5–55.6), respectively.
半定量玻片凝集试验和单管维达尔试验的阳性预测值（PPVs）分别为25.0%（95%可信区间：0.6-80.6）和20.0%（95%可信区间：2.5-55.6）。
Positive and negative predictive values were between 61% and 97% and between 95% and 96%, respectively.
阳性和阴性分别为61% - 97%和95% - 96%。
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