INTRAOBSERVER AND INTEROBSERVER RELIABILITY OF THE PULSATILITY INDEX CALCULATED FROM PULSED DOPPLER FLOW VELOCITY WAVE-FORMS IN 3 FETAL VESSELS

被引:46
作者
SCHERJON, SA
KOK, JH
OOSTING, H
ZONDERVAN, HA
机构
[1] Academic Medical Centre, H4-205, Department of Obstetrics & Gynaecology, Amsterdam, 1105 AZ
来源
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY | 1993年 / 100卷 / 02期
关键词
D O I
10.1111/j.1471-0528.1993.tb15208.x
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Objective Study of the intra observer and inter observer reliability of the pulsatility index, calculated from pulsed Doppler recordings of three fetal vessels. Design Flow velocity waveforms (FVW) were recorded from the umbilical artery, the fetal descending aorta and the fetal internal carotid artery. Intra-observer reliability was assessed in six fetuses; ten repeated measurements were performed by one observer. Inter-observer reliability was studied in 14 fetuses; two observers performed two repeated measurements in each fetus. Setting A tertiary referral hospital. Subjects High risk pregnancies with a gestational age ranging from 29 to 42 weeks. Main outcome measures Analysis of variance with repeated measurements and a graphical method were used for data analysis. Intra-observer repeatability was expressed as Intraclass Correlation Coefficient (IntraCC). Inter-observer agreement was expressed as Interclass Correlation Coefficient (InterCC). Results IntraCC for umbilical artery, descending aorta and internal carotid artery were 0.91, 0.78, and 0.54, respectively. InterCC values for these vessels were 0.39, 0.45 and 0.34, respectively. No systematic differences between the two observers except for the fetal descending aorta, were apparent. IntraCC decreased remarkable when fetuses with absent end diastolic velocities were excluded from the analysis. Conclusion The pulsatility index (PI) used for fetal measurements has a poor reliability. This is of serious concern when clinical use of FVW measurements is considered as a diagnostic tool.
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页码:134 / 138
页数:5
相关论文
共 18 条
[1]  
ARMITAGE P, 1987, STATISTICAL METHODS, P196
[2]   A NOTE ON THE USE OF THE INTRACLASS CORRELATION-COEFFICIENT IN THE EVALUATION OF AGREEMENT BETWEEN 2 METHODS OF MEASUREMENT [J].
BLAND, JM ;
ALTMAN, DG .
COMPUTERS IN BIOLOGY AND MEDICINE, 1990, 20 (05) :337-340
[3]   STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENT [J].
BLAND, JM ;
ALTMAN, DG .
LANCET, 1986, 1 (8476) :307-310
[4]  
Dixon W. J., 1990, BMDP STATISTICAL SOF
[5]  
EIKNES A, 1984, J BIOMED ENG, V4, P28
[6]  
Gosling R, 1974, CARDIOVASCULAR APPL, P266
[7]  
KLOOSTERMAN GJ, 1970, INT J GYNECOL OBSTET, V8, P895, DOI DOI 10.1002/J.1879-3479.1970.TB00313.X
[8]   CLINICAL BIOSTATISTICS .54. THE BIOSTATISTICS OF CONCORDANCE [J].
KRAMER, MS ;
FEINSTEIN, AR .
CLINICAL PHARMACOLOGY & THERAPEUTICS, 1981, 29 (01) :111-123
[9]  
KRAMER MS, 1990, PEDIATRICS, V85, P707
[10]  
LAURIN J, 1987, OBSTET GYNECOL, V69, P895