| Value |
Category |
| -9 |
Don't know (spontaneous) |
| -7 |
Does not apply |
| 0 |
No obstacle |
| 1 |
Minor obstacle |
| 2 |
Moderate obstacle |
| 3 |
Major obstacle |
| 4 |
Very severe obstacle |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
