The PATIENT's history of tobacco chewing as part of their TOBACCO USAGE.
National Codes:
| 1 | Current |
| 2 | Ex |
| 4 | Never |
| 9 | Unknown |
References:
National Cancer Data Set Version 1.1_ISB October 2001
This attribute is also known by these names:
| Context | Alias |
|---|---|
| plural | TOBACCO CHEWING HISTORY'S |