Objectives
To identify abnormal amniotic fluid volumes (AFVs), normal volumes must be determined. Multiple statistical methods are used to define normal amniotic fluid curves; however, quantile regression (QR) is gaining favor. We reanalyzed ultrasound estimates in identifying oligohydramnios, normal fluid, and polyhydramnios using normal volumes calculated by QR.
Methods
Data from 506 dye‐determined or directly measured AFVs along with ultrasound estimates were analyzed. Each was classified as low, normal, or high for both the single deepest pocket (SDP) and amniotic fluid index (AFI). A weighted κ statistic was used to assess the level of agreement between the AFI and SDP compared to actual AFVs by QR.
Results
The overall level of agreement for the AFI was fair (κ = 0.26), and that for the SDP was slight (κ = 0.19). Although not statistically significant (P = .792), the positive predictive value to classify a low volume using the AFI was lower compared to the SDP (35% vs 43%). The positive predictive value for a high volume was higher using the AFI compared to the SDP (55% versus 31%) but not statistically significant. The missed‐call rate for high‐volume identification by the SDP versus AFI was statistically significant (odds ratio, 5.5; 95% confidence interval, 2.04–14.97). The missed‐call rate for low‐volume identification by the AFI versus SDP was not statistically significant (odds ratio, 3.3; 95% confidence interval, 0.96–11.53).
Conclusions
Both the AFI and SDP identify actual normal AFVs by QR, with sensitivity higher than 90%. The SDP is superior for identification of oligohydramnios, and the AFI superior for identification of polyhydramnios.
against child abuse. Earlier, she stated that actual child abuse is tragically common (e.g., 1.7 million reported cases in 1985, p. 533). When discussing court cases based on recovered memories, she noted that there have been "too few actual trials from which to gather data" (p. 522). If millions of children are abused each year, there are several million adults who were abused as children.Taking the presented estimates of the frequency of psychogenic amnesia, 18% to 59% of these several million adults may have partial or total amnesia for their childhood trauma. If there have been so few court cases, the data suggest that the majority of the perpetrators of this abuse have not been prosecuted. Thus, these data do not suggest that we should reduce our efforts/ motivation to identify victims or perpetrators of child abuse. Future research should, however, be aimed at improving the methods used to assess and treat possible victims and perpetrators. We must also be careful to maintain a commitment to empiricism and sound scientific principles and not let our emotions, preconceptions, or other factors influence the way in which we examine and interpret data. Bower, G. H. (1991). Awareness, the unconscious, and repression: An experimental psychologists perspective. In J. L. Singer (Ed.), Repression and dissociation: Implications for personality theory, psychopathology and health (pp. 209-231). Chicago: University of Chicago Press. Holmes, D. (1991). The evidence for repression:
REFERENCESAn examination of sixty years of research. In J.L. Singer (Ed.), Repression and dissociation: Implications for personality theory, psychopathology and health (pp. 85-102). Chicago: University of Chicago Press. Loftus, E. F. (1993). The reality of repressed memories.
This study was undertaken to determine whether antenatal care can be achieved in women with at-risk pregnancies residing in rural areas with limited access to antenatal care and maternal fetal medicine (MFM) specialists. Over a period of 15 months, 156 women with high-risk pregnancies (diabetes, hypertensive disorders, suspected fetal anomalies, prior caesarean complications) from six different healthcare units had 350 visits managed by telemedicine.
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