手电筒侧照法的分级标准临床评价

Evaluation for Grading Standard of Oblique Flashlight Test

目的:研究手电筒侧照法分级标准及标准照片的真实性和可靠性。 方法:我们对251眼按手电筒侧照法分级标准照片作手电筒侧照的分级并以前房角为金标准对 不同分级的敏感度和特异度分析。同时我们对250眼手电筒侧照法分级不同观察者间测量变异 分析,对88眼作了同一观察者前后测量变异分析。 结果:1.手电筒侧照分级标准的真实性评价结果显示:当ILBRⅡ级作为临界值时,发现1/2或 以上为窄Ⅲ房角的敏感度为96.67％,特异度为74.53％,正确指数为0.712。2.手电筒侧照法分 级标准可靠性评价:两个观察者间分级的观察一致率(Po)为0.8,K=0.74,Z=22.48;同一观察 者不同时间进行分级的一致率(Po)为0.909,K=0.875,Z=16.08,说明其一致率有统计学高度 显著性意义。 结论:研究显示手电筒侧照法的分级标准及分级照片有满意的真实性和可靠性,可作为判断浅 前房和窄房角方法在临床中试用。眼科学报 1996;12:98—102。

Purpose:We try to study, the, validity and reliability of grading standard of oblique flashlight test in this paper. Methods: The validity of the grading standard of the oblique flashlight test was evaluated in 251 eyes. Based on anterior chamber angle as the gold standard, different grades of oblique flashlight test can find capable of closure angle sensitivity and specificity. The reliabilities ( interobserver agreement and intraobserver agreement)also were evaluated in 250 and 88 eyes. Results: 1. Validity of grading standard of oblique flashlight test: the results showed that it can find capable of closure angle sensitivity is 96. 67%,specificity is 74. 53% and Youden's index is 0. 712,when the grades cutoff point on grade II . 2. Reliability of grading standard of oblique flashilght test;the results showed that the intraobserver agreement was obseved agreement(Po) = 0. 8,Kappa value (K)=0.74 , Z = 22. 48 and the intraobserver agreement was Po = 0. 909 , K = 0. 875,Z=16. 08. Conclusions:The results of this research showed there are satisfactory validity and reliability for grading standard of oblique flashlight test. The test may be applied widely to estimate shallow anterior chamber and narrow angle. Eye Science 1996; 12:98-102.