A subset of the Income data set from the US American National Health and Nutrition Examination Survey (NHANES)
collected by the Centers for Disease Control and Prevention (CDC) and
the National Center for Health Statistics (NCHS) for 2015-2016. Four variables were dropped:
seqn, the respondent sequence number, as the information was included into the rownames;
indfmmpi and indfmmpc, the Family monthly poverty level index/category as these
variables are too overcomplex for the illustrative purpose of the data and inq300,
the response to the question whether the family has more than 20000 dollars of savings -
this information was merged into the variable ind310, the total savings of the family.
This gave several new categories for ind310: individuals reporting savings below 20,000 USD
(inq300 == 2), but reporting "refused" or "don't know" to the detailed question of the total savings
ind310, get the new category 6 "0 - 20,000 USD". The individuals reported to have more than 20,000 USD savings
(inq300 == 1), get the new category 7 "20,001 USD and over". Individuals reporting "refused" or
"don't know" to inq300 (more than 20000 USD savings?) get the new category 8 "0 USD and over".
In ind235, the monthly family income, missing values are made a new category "0 USD and over".
The variable inq320 was transformed into a factor.
"Refused" and "Don't know" responses where changed to NA.
The Website (https://wwwn.cdc.gov/Nchs/Nhanes/2015-2016/INQ_I.htm) gives the following Analytic notes:
"The income questions were asked as part of household interview,
the interview sample weights may be used in the analysis for data in this section.
However, if the data is joined with other data from the Mobile Examination Center (MEC),
the MEC exam weights should be used. Please refer to the NHANES Analytic Guidelines
and the on-line NHANES Tutorial for further details on the use of sample weights
and other analytic issues. Both of these are available on the NHANES website."
nhanes_subA data frame with 9971 rows and 12 variables:
Income from wages/salaries? 1 = Yes, 2 = No
Income from self employment? 1 = Yes, 2 = No
Income from Social Security or Railroad Retirement? 1 = Yes, 2 = No
Income from other disability pension? 1 = Yes, 2 = No
Income from retirement/survivor pension? 1 = Yes, 2 = No
Income from Supplemental Security Income? 1 = Yes, 2 = No
Income from state/county cash assistance? 1 = Yes, 2 = No
Income from interest/dividends or rental? 1 = Yes, 2 = No
Income from other sources? 1 = Yes, 2 = No
Monthly family income? 1 = 0 - 399 USD, 2 = 400 - 799 USD, 3 = 800 - 1,249 USD, 4 = 1,250 - 1,649 USD, 5 = 1,650 - 2,099 USD, 6 = 2,100 - 2,899 USD, 7 = 2,900 - 3,749USD, 8 = 3,750 - 4,599USD, 9 = 4,600 - 5,399 USD, 10 = 5,400 - 6,249 USD, 11 = 6,250 - 8,399 USD, 12 = 8,400 USD and over, 13 = 0 USD and over
Total savings/cash assets for the family? 1 = 0 - 3,000 USD, 2 = 3,001 - 5,000 USD, 3 = 5,001 - 10,000, 4 = 10,001 - 15,000 USD, 5 = 15,001 - 20,000, 6 = 0 - 20,000 USD, 7 = 20,001 USD and over, 8 = 0 USD and over
How do you get to the grocery store?, 1 = In my car, 2 = In a car that belongs to someone I live with, 3 = In a car that belongs to someone who lives elsewhere, 4 = Walk, 5 = Ride bicycle, 6 = Bus, subway or other public transit, 7 = Taxi or other paid driver, 8 = Someone else delivers groceries, 9 = Other, 66 = No usual mode of traveling to store, 77 = Refused, 99 = Don't know
Centers for Disease Control and Prevention (CDC). National Center for Health Statistics (NCHS). National Health and Nutrition Examination Survey Data. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. Variables descriptions at https://wwwn.cdc.gov/Nchs/Nhanes/2015-2016/INQ_I.htm