Suggested scoring system
| Score for proportion staining | Score for staining intensity |
|---|---|
| Adding the two scores together gives a maximum score of 8. | |
| 0 = No nuclear staining | 0 = No staining |
| 1 = <1% nuclei staining | 1 = Weak staining |
| 2 = 1–10% nuclei staining | 2 = Moderate staining |
| 3 = 11–33% nuclei staining | 3 = Strong staining |
| 4 = 34–66% nuclei staining | |
| 5 = 67–100% nuclei staining | |