Display of IBR Data:
|LB||Pound||NP||Number of Plants|
If more than three drugs are involved, the quantities and measurement type of the two most important, as determined by quantity, value, and deadliness, should be entered in the first two entries. The third entry, corresponding to the Over 3 Drug Types entry, should be left blank.
When the XX 'Not Reported' entry is used due to a lack of measurable data from a lab, this must be updated when the information is received.
Data Quality Issues
The type of measurement used should make sense based on the type of drug being measured. For example, it is unlikely that marijuana would be measured in fluid ounces. As the table below shows, a small percentage of property entries listing drugs as property measure marijuana in fluid measurements.
|Number of Property Entries||Percentage|
This data quality check is also useful to verify that no measurements are entered when the 'X' Over 3 Drug Types code is used. In the 2000 NIBRS data, no measurements were associated with this code.
The crosstabulation tables used in this example are too large to be displayed here. If you would like to recreate this table using your data in SPSS, download the syntax file. Combine the figures created in the three tables to get totals. If you need assistance using this file, please contact JRSA.