Background: This study was conducted to discuss predictive value of a routine urine test for premature rupture of the membranes(PROM).Methods: We carried out the retrospective research after collecting routine urine test data from 45 cases of full preterm premature rupture of membranes (PPROM) and 45 cases of full-term preterm premature rupture of membranes (fPROM). In addition 70 healthy pregnant women (Normal) and 70 non-pregnant adult healthy women were enrolled. Parametric and Non-parametric tests was performed respectively. The receiver operating characteristic (ROC) was established and we further calculated the area under the ROC curve (AUC). In this study multiple cutoffs were selected, afterwords the positive predictive value (PPV), the negative predictive value (NPV), the positive likelihood ratio (+LR) and negative likelihood ratio (-LR) were further calculated by sensitivity and specificity with the aim of finding the best cutoff point.Results: The results indicated that S/G and COND were significantly different between PROM and Non-pregnant and Normal groups. Significant differences in pH, WBCs, RBCs, BAC and EC between the PPROM and Normal groups were observed. When the cutoff for bacteria was 89.15, it had the largest AUC of 0.744. We found that its PPV 70.6%, NPV was 74.1%, +LR was 3.79, and –LR was 0.55.Conclusion: A routine urine test especially for bacterial counts can be used to predict the risk of PROM, which is expected to provide considerable predictive value for PROM.
This study uses the travel cost method (TCM) and the tourism market demand curve to evaluate the recreational value of the Color-leaf forest resources in Bipeng Valley Scenic Spot at the first time, which contributes to the utilization and management of the Color-leaf forest resources, and also discusses the importance and value of forestry resources. The results show that the research value of the research and development of the Color-leaf forest resources was 1567.48 million Yuan, which is 13 times the actual income of the Bipeng Valley Scenic Spot. It means scenic spot should avoid idle resources, improve its product mix and protect the Color-leaf forest resources to realize the sustainable use of forest resources of arid and semi-arid area of sichuan province.
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