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National Cancer Data Base - Data Dictionary PUF 2015
DD_category: 
PUF Data Item Name: 
MED_INC_QUAR_00
length: 
1
Allowable values: 
1 – 4, 9
Description: 
Median household income for each patient's area of residence is estimated by matching the zip code of the patient recorded at the time of diagnosis against files derived from year 2000 US Census data. Household income is categorized as quartiles based on equally proportioned income ranges among all US zip codes.
Registry Coding Instructions: 

None.

Code Definition
1 Less than $30,000
2 $30,000 - $34,999
3 $35,000 - $45,999
4 $46,000 +
Blank Not Available