Interobserver Variability of Transrectal Ultrasound for Prostate Volume Measurement According to Volume and Observer Experience
Interobserver Variability of Transrectal Ultrasound for Prostate Volume Measurement According to Volume and Observer Experience
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DOI：
10.2214/ajr.07.3617
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发表时间：
2009-02-01
影响因子：
5
通讯作者：
Cho, Kyoung-Sik
中科院分区：
文献类型：
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作者：
Choi, Young Jun;Kim, Jeong Kon;Cho, Kyoung-Sik
目标。本研究的目的是根据前列腺体积和观察者经验水平来评估经直肠超声测量前列腺体积的观察者间变异性。研究对象和方法。101例患者由两名经验丰富的观察者独立进行直肠内超声检查，110例患者由一名经验丰富的观察者和一名经验不足的观察者独立进行；然后用长形椭球公式测量前列腺体积。根据观察者测定的前列腺体积平均值和观察者的经验水平，分析观察者之间的体积差异。平均测量容积>= 30 mL的前列腺体积差异大于平均测量容积< 30 mL的前列腺体积差异（经验丰富的观察者为6.00 vs 1.51 mL，经验丰富和经验不足的观察者为6.84 vs 3.99 mL） （p < 0.05）。平均测量容积>= 30 mL的前列腺比平均测量容积< 30 mL的前列腺体积差异bbb50 mL的频率更高（经验丰富的观察者之间，18% vs 1%；经验丰富的观察者和经验不足的观察者之间，54% vs 25%）（两种比较均p < 0.01）。经验丰富的观察者与经验不足的观察者之间的容积差（5.00 mL）大于经验丰富的观察者之间的容积差（2.96 mL） （p = 0.01）。经验丰富者与经验不足者的容积差频率（35%）高于经验丰富者（7%），差异有统计学意义（p < 0.01）。经直肠超声测量前列腺体积可能因患者前列腺大或观察者经验不同而有所不同。
OBJECTIVE. The purpose of our study was to evaluate the interobserver variability of transrectal ultrasound for prostate volume measurement according to the prostate volume and the level of observer experience.SUBJECTS AND METHODS. Endorectal sonography was performed independently by two experienced observers in 101 patients and by one experienced and one less experienced observer in 110 patients; the prostate volume was then measured using the prolate ellipsoid formula. The volume difference between observers was analyzed according to the mean measured prostate volume determined by the observers and according to the level of observer experience.RESULTS. The volume difference was greater in prostates with a mean measured volume >= 30 mL than in prostates with a mean measured volume < 30 mL (6.00 vs 1.51 mL in the experienced observers and 6.84 vs 3.99 mL in the experienced and less experienced observers) (p < 0.05). The frequency of volume differences > 5 mL was greater in prostates with a mean measured volume >= 30 mL than in prostates with a mean measured volume < 30 mL (between the experienced observers, 18% vs 1%; between the experienced and less experienced observers, 54% vs 25%) (p < 0.01 in both comparisons). The volume difference was greater between the experienced and less experienced observers (5.00 mL) than between the experienced observers (2.96 mL) (p = 0.01). The frequency of volume difference > 5 mL was greater between the experienced and less experienced observers (35%) than between the experienced observers (7%) ( p < 0.01).CONCLUSION. Prostate volume measurement by transrectal ultrasound may vary when patients have large prostates or observers have varying levels of experience.