| Value | Category | 
|---|---|
| -9 | Don't Know | 
| -8 | Refused | 
| -5 | Not Applicable | 
| -3 | Missing | 
| 1 | Rarely or none of the time - (less than 1 day) | 
| 2 | Some or little of the time - (1-2 days) | 
| 3 | Occasionally or a moderate amount of time - (3-4 days) | 
| 4 | All the time - (5-7 days) | 
| Sysmiss |