From: Homogeneity score test of AC1 statistics and estimation of common AC1 in multiple or stratified inter-rater agreement studies
PVR grade
C3
D1
D2
D3
Both (x1)
1
6
5
3
One (x2)
9
8
11
Neither (x3)
65
46
54
33
Total (n)
75
60
70
45
π
0.073
0.167
0.150
pa
0.880
0.867
0.843
0.800
κ (MLE)
0.117
0.520
0.384
0.280
AC1 (MLE)
0.861
0.815
0.789
0.723