Bagger P V, Sindberg Eriksen P, Secher N J, Thisted J, Westergaard L
Acta Obstet Gynecol Scand. 1985;64(5):371-4. doi: 10.3109/00016348509155150.
We studied the precision and accuracy of SF measurements. Five trained obstetricians made three measurements of SF on each of 33 patients in the third trimester. The intraobserver variation varied from 0 cm to 8 cm, and comprised on average 1.5 to 2 cm (95th centiles 2.5 to 4 cm). The interobserver variation varied from 1 to 13 cm, and comprised on average 4 cm (95th centile 8 cm). The accuracy of SF measurements was estimated by comparison with ultrasound-guided measurements, which showed a very high precision. Two of the investigators differed significantly, by -1.56 cm and -1.97 cm, from the other 3.
我们研究了坐骨棘间径（SF）测量的精密度和准确性。五名训练有素的产科医生对33名孕晚期患者的SF进行了三次测量。观察者内变异范围为0厘米至8厘米，平均为1.5至2厘米（第95百分位数为2.5至4厘米）。观察者间变异范围为1至13厘米，平均为4厘米（第95百分位数为8厘米）。通过与超声引导下的测量结果进行比较来评估SF测量的准确性，超声引导下的测量显示出非常高的精密度。两名研究者与其他三名研究者的差异显著，分别相差-1.56厘米和-1.97厘米。
