When NST was of non-reactive type and OCT/CST was positive, prediction of bad prognosis of fetus was correct in only 27% and 12.5% respectively, in other words, there was very high false positive rate.

• 试验结果异常(NST无反应型或OCT/CST阳性)预测胎儿预后不良的准确性分别为27%25和12.；5%25；有较高的假阳性率。 因此胎心率监护试验必须结合临床情况和其它检验；才能对胎儿情况作出准确判断。