| Author |
Hyun Gyu Yoo, MD, Jae Hong Ahn, MD, PhD, Mar Vin Lee, MD |
| Place of duty |
Department of Ophthalmology, Ajou University School of Medicine, Suwon, Korea |
| Title |
The Ability of Disc-to-Fovea Distance to Disc-Diameter Ratio to
Estimate Optic Disc Size |
| Publicationinfo |
J Korean Ophthalmol Soc 2013 Jun 054(06): 913-918. |
| Key_word |
Disc diameter, Disc-to-fovea distance, Optic disc size, Stereoscopic disc photography |
| Full-Text |
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| Abstract |
Purpose: To investigate the usefulness of the measurement of disc-to-fovea distance to disc-diameter ratio (DF/DD ratio)
in detecting large and small discs.
Methods: A total of 300 randomly selected subjects were included in the present study. All patients underwent stereoscopic
disc photography and DF/DD ratio, which is the shortest distance between disc margin and fovea divided by mean
disc diameter was determined by planimetry. The diagnostic accuracy of DF/DD ratio was evaluated using areas under the
receiver operating characteristics curves (AUCs), sensitivity, and specificity.
Results: No significant differences in disc-to-fovea distance were observed among small and large disc groups. The
DF/DD ratio was significantly lower in subjects with large discs (1.74 ± 0.27) compared with subjects with small discs (2.70
± 0.15). AUCs of the DF/DD ratio were 0.942 and 0.947 in detecting large and small discs, respectively. In detecting disc
size by a fixed DF/DD ratio of 2.0, sensitivity was 100% for both large and small discs, and specificity was 70.1% and
40.9% for the large and small discs, respectively.
Conclusions: The DF/DD ratio may be a simple and useful clinical aid in detecting large and small discs. The 2.0 fixed
DF/DD ratio, showed 100% sensitivity in detecting both large and small discs, although medium discs may be misdiagnosed
as small discs more often than as large discs. |
| 저 자 |
유현규⋅안재홍⋅이마빈 |
| 소 속 |
아주대학교 의과대학 안과학교실 |
| 제 목 |
시신경유두직경에 대한 유두연-황반오목거리의 비를
이용한 시신경유두 크기 평가의 예측력 |
| 출판정보 |
대한안과학회 2013 Jun 054(06): 913-918. |
| 키워드 |
Disc diameter, Disc-to-fovea distance, Optic disc size, Stereoscopic disc photography |
| 초 록 |
목적: 시신경유두직경에 대한 유두연-황반오목거리의 비(disc-to-fovea distance to disc-diameter ratio; DF/DD ratio)의 큰 시신경
유두와 작은 시신경유두 구별에 대한 유용성을 알아보았다.
대상과 방법: 정상 및 녹내장 300안을 대상으로 입체 시신경유두 사진을 이용하여 DF/DD ratio를 구하고, 시신경유두 크기에 대한 추정
능력 판정을 위해 Area under the receiver operating characteristics curves (AUCs)와 민감도 및 특이도를 분석했다.
결과: DF/DD ratio를 이용하여 예측한 AUCs는 큰 시신경유두의 경우 0.942, 작은 시신경유두의 경우 0.947이었다. DF/DD ratio 2.0을
기준으로 하였을 때 각각의 진단에 있어 100%의 민감도를 가지나 큰 시신경유두는 70.2%, 작은 시신경유두는 40.9%의 특이도를 보였다.
결론: DF/DD ratio는 큰 시신경유두와 작은 시신경유두의 구별에 유용하며 DF/DD ratio 2.0을 기준으로 설정하면 100%의 민감도를
보였으나 중간 크기의 시신경유두가 작은 시신경유두로 분류될 확률이 높았다. |
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