| Epochs | No. of subjects (%) | ||
| NE | Class A–B | Class C–D | |
| Baseline | Endoscopy 2 (n = 3669) | ||
| NE (n = 3066) | 2693 (87.8) | 350 (11.4) | 23 (0.8) |
| Class A–B (n = 586) | 249 (42.5) | 304 (51.9) | 33 (5.6) |
| Class C–D (n = 17) | 0 (0) | 0 (0) | 17 (100) |
| Endoscopy 2 | Endoscopy 3 (n = 1140) | ||
| NE (n = 930) | 791 (85.1) | 136 (14.6) | 3 (0.3) |
| Class A–B (n = 198) | 74 (37.3) | 109 (55.1) | 15 (7.6) |
| Class C–D (n = 12) | 0 (0) | 0 (0) | 12 (100) |
| Endoscopy 3 | Endoscopy 4 (n = 336) | ||
| NE (n = 252) | 207 (82.1) | 45 (17.9) | 0 (0) |
| Class A–B (n = 78) | 27 (34.6) | 39 (50) | 12 (15.4) |
| Class C–D (n = 6) | 0 (0) | 0 (0) | 6 (100) |
NE, non-erosive state.