Table 2 Immunohistochemistry results of IDO and PD-L1
Staining intensity | n (%) | Distribution | n (%) | Total score | n (%) |
|---|---|---|---|---|---|
< IDO expression> | |||||
0, no staining | 52 (58%) | 0, 0% | 52 (58%) | 0 | 52 (58%) |
1+, weak staining | 2 (2%) | 1+, 1–9% | 8 (9%) | 1 | 0 |
2+, moderate staining | 15 (17%) | 2+, 10–50% | 21 (23%) | 2 | 0 |
3+, string staining | 21 (23%) | 3+, 51–80% | 8 (9%) | 3 | 8 (9%) |
|  | 4+, 81–100% | 1 (1%) | 4 | 3 (33%) | |
| Â | Â | Â | 5 | 25 (28%) | |
| Â | Â | Â | 6 | 1 (1%) | |
| Â | Â | Â | 7 | 1 (1%) | |
< PD-L1 expression> | |||||
0, no staining | 18 (20%) | 0, 0–5% | 18 (20%) | 0 | 18 (20%) |
1+, weak staining | 23 (26%) | 1+, 6–25% | 16 (18%) | 1 | 0 |
2+, moderate staining | 38 (42%) | 2+, 26–50% | 38 (42%) | 2 | 6 (7%) |
3+, string staining | 11 (12%) | 3+, 51–75% | 11 (12%) | 3 | 20 (22%) |
|  | 4+, 76–100% | 7 (8%) | 4 | 25 (28%) | |
| Â | Â | Â | 5 | 14 (16%) | |
| Â | Â | Â | 6 | 5 (5%) | |
| Â | Â | Â | 7 | 2 (2%) | |