Table 3.

Inter grader agreement in e-ROP Study

Inter-Grader Variability for the Samples of Contemporaneous Variability. All Samples Combined (n=80)
Variable	Percent Agreement	Weighted Kappa
Pupil Quality	94%	0.73 (0.56, 0.91)
Disc Center Quality	66%	0.47 (0.30, 0.65)
Disc Up Quality	74%	0.56 (0.43, 0.69)
Disc Down Quality	78%	0.40 (0.25, 0.56)
Disc Temporal Quality	81%	0.66 (0.51, 0.81)
Disc Nasal Quality	74%	0.49 (0.34, 0.64)
Posterior Pole Vessels	80%	0.60 (0.39, 0.82)
Preplus/plus in each quadrant
ST Quadrant	79%	0.69 (0.52, 0.86)
IT Quadrant	71%	0.59 (0.42, 0.76)
IN Quadrant	71%	0.49 (0.32, 0.67)
SN Quadrant	78%	0.59 (0.42, 0.76)
Total Quadrants of Plus/Preplus	65%	0.68 (0.51, 0.84)
Total Quadrants of Plus	88%	0.50 (0.32, 0.68)
Dominant Feature	71%	0.58 (0.42, 0.75)
Any ROP	95%	0.89 (0.68, 1.00)
Demarcation Line	99%	0.74 (0.56, 0.92)
Ridge	83%	0.65 (0.45, 0.86)
Extra Retinal Fibrovascular Proliferation	83%	0.67 (0.47, 0.88)
Flat Pre-retinal Neovascular Proliferation	100%	1.00 (1.00, 1.00)
Retinal Detachment	100%	1.00 (1.00, 1.00)
Highest Stage	81%	0.85 (0.67, 1.00)
Lowest Zone	80%	0.81 (0.63, 0.99)
Plus Disease	90%	0.57 (0.37, 0.77)
Zone 1 ROP	83%	0.43 (0.24, 0.63)
Stage 3 or Worse	83%	0.67 (0.47, 0.88)
Referral-Warranted ROP	85%	0.72 (0.52, 0.93)