Table 3.

Correlation of the baseline clinical grading by four graders

The correlation coefficient, P	Baseline clinical grading	Grader A	Grader B	Grader C	Grader D
Baseline clinical grading	-	0.878, P<0.001	0.862, P<0.001	0.83, P<0.001	0.805, P<0.001
Grader A	0.878, P<0.001	-	0.806, P<0.001	0.749, P<0.001	0.732, P<0.001
Grader B	0.862, P<0.001	0.806, P<0.001	-	0.903, P<0.001	0.778, P<0.001
Grader C	0.83, P<0.001	0.749, P<0.001	0.903, P<0.001	-	0.749, P<0.001
Grader D	0.805, P<0.001	0.732, P<0.001	0.778, P<0.001	0.749, P<0.001	-