Vertical and horizontal disc diameter measurements (VDD and HDD)
Study A | Study B | |||||
---|---|---|---|---|---|---|
Pupil size | Undilated | Dilated | Undilated | Dilated | ||
Subjects | N=52 | N=34 | N=45 | N=42 | ||
VDD differences (observer 1 − observer 2) | Mean (mm) | 0.0557 | 0.0544 | 0 | 0.0071 | |
Range (mm) | −0.3 to 0.4 | −0.15 to 0.2 | −0.2 to 0.3 | −0.4 to 0.35 | ||
95% limit of agreement | 0.2404 | 0.1607 | 0.2481 | 0.2297 | ||
F test | p=0.0125 | p=0.609 | ||||
HDD differences (observer 1 − observer 2) | Mean (mm) | 0.0096 | 0.0147 | 0.0078 | 0.0417 | |
Range (mm) | −0.3 to 0.4 | −0.1 to 0.2 | −0.35 to 0.25 | −0.2 to 0.3 | ||
95% limit of agreement | 0.2696 | 0.1732 | 0.2463 | 0.2659 | ||
F test | p=0.0063 | p=0.62 |