Proposed response scale consistent with the ICF qualifiers
| Response options | Descriptor | Scaling |
| 0 | No problem | 0%–4% of the time |
| 1 | Mild problem | 5%–24% of the time |
| 2 | Moderate problem | 25%–49% of the time |
| 3 | Severe problem | 50%–95% of the time |
| 4 | Complete problem | 96%–100% of the time |
Adapted from ICF, by WHO (2001).
ICF, International Classification of Functioning, Disability and Health.