Table 3. Grade distribution (%) based on the last available audiogram according to different CTCAEv4.03, Muenster, SIOP, Brock and Chang classification systems.
| Scale | Grade 0, n (%) |
Grade 1a, n (%) |
Grade 1b, n (%) |
Grade 2a, n (%) |
Grade 2b, n (%) |
Grade 2c, n (%) |
Grade 3a, n (%) |
Grade 3b, n (%) |
Grade 3c, n (%) |
Grade 4, n (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| CTCAEv4.03 | 171 (32.8) | 50 (9.6) | 133 (25.5) | 153 (29.3) | 14 (2.7) | |||||
| Muenster | 129 (19.7) | 186 (13.3) | 52 (7.8) | 89 (13.6) | 97 (14.8) | 55 (8.4) | 69 (10.7) | 33 (5) | 45 (6.9) | |
| SIOP | 215 (32.9) | 123 (18.8) | 103 (15.8) | 109 (16.7) | 103 (15.8) | |||||
| Brock | 255 (39.1) | 132 (20.2) | 153 (23.5) | 77 (11.8) | 35 (5.4) | |||||
| Chang | 249 (38.2) | 96 (14.7) | 44 (6.7) | 59 (9) | 38 (5.8) | 130 (19.9) | 36 (5.5) |
Abbreviations: CTCAE = U.S. National Cancer Institute Common Technology Criteria for Adverse Events, SIOP = International Society of Pediatric Oncology Boston