Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 0 |
0%
|
1 | One hour or less | 1 |
0.7%
|
2 | 1 |
0.7%
|
|
6 | 2 |
1.3%
|
|
10 | 1 |
0.7%
|
|
12 | 1 |
0.7%
|
|
18 | 1 |
0.7%
|
|
NA | 144 |
95.4%
|