Table 5. Inter- and intra-observer reliability in the use of each of the three classification systems .
| Methods | Miller | Mahajan | Cairo | ||||||||||
| Differences | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | ||
| Observers | B&A |
80 (66.7%) |
32 (26.7%) |
8 (6.7%) |
0 |
76 (63.3%) |
34 (28.3%) |
10 (8.3%) |
0 |
80 (66.7%) |
37 (30.8%) |
3 (2.5%) |
|
| C&A |
67 (55.8%) |
46 (38.3%) |
7 (5.8%) |
0 |
64 (53.3%) |
48 (40%) |
8 (6.7%) |
0 |
84 (70%) |
32 (26.7%) |
4 (3.3%) |
||
| C&B |
86 (71.7%) |
29 (24.2%) |
5 (4.2% 0) |
0 |
71 (59.7%) |
48 (40%) |
1 (0.8%) |
0 |
83 (69.2%) |
35 (29.2%) |
2 (1.7%) |
||
| Total |
233 (64.7%) |
107 (29.7% 0) |
20 (5.6%) |
0 |
211 (58.6%) |
130 (36.1%) |
19 (5.3%) |
0 |
247 (68.6%) |
104 (28.9%) |
9 (2.5%) |
||