| No numbness | 0 |
| Occasionally once in a day for few minutes | 1 |
| Daily once in a day for few minutes | 2 |
| Daily for 2 or more times/30-60 minutes | 3 |
| Daily more than 1 hour/many times a day | 4 |
| No numbness | 0 |
| Occasionally once in a day for few minutes | 1 |
| Daily once in a day for few minutes | 2 |
| Daily for 2 or more times/30-60 minutes | 3 |
| Daily more than 1 hour/many times a day | 4 |