From: Supratubal recess and sinus tympani: CT analysis of middle ear hidden areas
ST type | Type A | Type B | Type C | Total | P value |
---|---|---|---|---|---|
STR grade | |||||
Grade 1 | 4 (33%) | 8 (67%) | 0 (0%) | 12 (6%) | 0.3 NS X2 = 4.874 |
Grade 2 | 41 (25.6%) | 118 (73.8%) | 1 (0.6%) | 160 (80%) | |
Grade 3 | 11 (39%) | 16 (57%) | 1 (4%) | 28 (14%) | |
Total | 56 (28%) | 142 (71%) | 2 (1%) | 200 (100%) |