Variable IM21AY : Year of Hepatitis B1 immunization
Overview
|
Type:
Continuous
Format: numeric Width: 4 Decimal(s): 0 Range: 2001-9999 |
Valid case(s): 7206
Invalid: 27504 Minimum: 2001 Maximum: 2006 |
File: ch
Categories
| Value | Category |
|---|---|
| 9999 | Missing |
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.