Description Usage Format Details Source References
Includes 45 demographics variables for participants in NHANES 2003-2006.
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A data frame with 20470 observations on the following 45 variables.
seqn
Respondent sequence number (i.e. participant ID).
sddsrvyr
Data release number (3 if participant is from NHANES 2003-2004, 4 if participant is from NHANES 2005-2006).
ridstatr
Interview/examination status (1 if participant was interviewed only, 2 if participant was both interviewed and Mobile Examination Center examined).
ridexmon
Six month time period when examination was performed (1 for Nov. 1-April 30, 2 for May 1-Oct. 31).
riagendr
Gender (1 = Male, 2 = Female).
ridageyr
Age in years at time of household screening. Values are whole numbers from 0 to 85, with 85 indicating that the participant was 85 years of age or older.
ridagemn
Age in months at time of household screening for participants younger than 85 years.
ridageex
Age in months at time of examination for participants younger than 85 years.
ridreth1
Race/ethnicity (1 = Mexican American, 2 = Other Hispanic, 3 = Non-Hispanic White, 4 = Non-Hispanic Black, 5 = Other Race - Including Multi-Racial).
dmqmilit
Veteran/military status. Did you ever serve in the Armed Forces of the United States? (1 = Yes, 2 = No, 7 = Refused, 9 = Don't know)
dmdborn
Country of birth (1 = Born in 50 US States or Washington, DC, 2 = Born in Mexico, 3 = Born Elsewhere, 7 = Refused, 9 = Don't know).
dmdcitzn
Citizenship status (1 = Citizen by birth or naturalization, 2 = Not a citizen of the US, 7 = Refused, 9 = Don't know).
dmdyrsus
Length of time in US (1 = Less than 1 yr., 2 = 1 yr., less than 5 yrs., 3 = 5 yrs., less than 10 yrs., 4 = 10 yrs., less than 15 yrs., 5 = 15 yrs., less than 20 yrs., 6 = 20 yrs., less than 30 yrs., 7 = 30 yrs., less than 40 yrs., 8 = 40 yrs., less than 50 yrs., 9 = 50 yrs. or more, 77 = Refused, 88 = Could not determine, 99 = Don't know).
dmdeduc3
Education level for children/youth age 6-19 years. What is the highest grade or level of school you completed or the highest degree you have received? (0 = Never attended/kindergarten only, 1 = 1st grade, 2 = 2nd grade, 3 = 3rd grade, 4 = 4th grade, 5 = 5th grade, 6 = 6th grade, 7 = 7th grade, 8 = 8th grade, 9 = 9th grade, 10 = 10th grade, 11 = 11th grade, 12 = 12th grade, no diploma, 13 = High school graduate, 14 = GED or equivalent, 15 = More than high school, 55 = Less than 5th grade, 66 = Less than 9th grade, 77 = Refused, 99 = Don't know)
dmdeduc2
Education level for adults age 20 years or older. What is the highest grade or level of school you have completed or the highest degree you have received? (1 = Less than 9th Grade, 2 = 9-11th grade (Includes 12th grade with no diploma), 3 = High school grad/GED or equivalent, 4 = Some college or AA degree, 5 = College graduate or above, 7 = Refused, 9 = Don't know)
dmdschol
Now attending school? (1 = In school, 2 = On vacation from school (between grades), 3 = Neither in school or on vacation from school (between grades), 7 = Refused, 9 = Don't know)
dmdmartl
Marital status (1 = Married, 2 = Widowed, 3 = Divorced, 4 = Separated, 5 = Never married, 6 = Living with partner, 77 = Refused, 99 = Don't know).
dmdhhsiz
Total number of people in the household (7 indicates 7 or more people).
indhhinc
Annual household income (1 = $0 to $4,999, 2 = $5,000 to $9,999, 3 = $10,000 to $14,999, 4 = $15,000 to $19,999, 5 = $20,000 to $24,999, 6 = $25,000 to $34,999, 7 = $35,000 to $44,999, 8 = $45,000 to $54,999, 9 = $55,000 to $64,999, 10 = $65,000 to $74,999, 11 = $75,000 and Over, 12 = Over $20,000, 13 = $Under 20,000, 77 = Refused, 99 = Don't know).
indfminc
Annual family income (1 = $0 to $4,999, 2 = $5,000 to $9,999, 3 = $10,000 to $14,999, 4 = $15,000 to $19,999, 5 = $20,000 to $24,999, 6 = $25,000 to $34,999, 7 = $35,000 to $44,999, 8 = $45,000 to $54,999, 9 = $55,000 to $64,999, 10 = $65,000 to $74,999, 11 = $75,000 and Over, 12 = Over $20,000, 13 = $Under 20,000, 77 = Refused, 99 = Don't know).
indfmpir
Family poverty income ratio (PIR) (5 indicates PIR of 5 or greater).
ridexprg
Pregnancy status at the time of MEC exam (1 = Yes, positive lab pregnancy test or self-reported pregnant at exam, 2 = Not pregnant at exam, 3 = Cannot ascertain if pregnant at exam).
dmdhrgnd
Gender of the household reference person (1 = Male, 2 = Female).
dmdhrage
Age in years of the household reference person at the time of screening. Values are whole numbers from 16 to 85, with 85 indicating that the household reference person was 85 years of age or older.
dmdhrbrn
Household reference person country of birth (1 = Born in 50 US States or Washington, DC, 2 = Born in Mexico, 3 = Born Elsewhere, 7 = Refused, 9 = Don't know).
dmdhredu
Education level for household reference person. What is the highest grade or level of school you have received? (1 = Less than 9th grade, 2 = 9-11th grade (Includes 12th grade with no diploma), 3 = High school grad/GED or equivalent, 4 = Some college or AA degree, 5 = College graduate or above, 7 = Refused, 9 = Don't know)
dmdhrmar
Marital status of household reference person (1 = Married, 2 = Widowed, 3 = Divorced, 4 = Separated, 5 = Never married, 6 = Living with partner, 77 = Refused, 99 = Don't know).
dmdhsedu
Education level for spouse of household reference person. What is the highest grade level you have completed or the highest degree you have received? (1 = Less than 9th grade, 2 = 9-11th grade (Includes 12th grade with no diploma), 3 = High school grad/GED or equivalent, 4 = Some college or AA degree, 5 = College graduate or above, 7 = Refused, 9 = Don't know)
sialang
Language used for interview (1 = English, 2 = Spanish).
siaproxy
Whether a proxy respondent was used in conducting the interview (1 = Yes, 2 = No).
siaintrp
Whether an interpreter was used in conducting the interview (1 = Yes, 2 = No).
fialang
Language used for the Family Interview Instrument (1 = English, 2 = Spanish).
fiaproxy
Whether a proxy respondent was used in conducting the Family Interview (1 = Yes, 2 = No).
fiaintrp
Whether an interpreter was used in conducting the Family Interview (1 = Yes, 2 = No).
mialang
Language used for the MEC Interview (1 = English, 2 = Spanish).
miaproxy
Whether a proxy respondent was used in conducting the MEC Interview (1 = Yes, 2 = No).
miaintrp
Whether an interpreter was used in conducting the MEC Interview (1 = Yes, 2 = No).
aialang
Language used for the MEC Audio-Computer-Assisted Self-Interviewing interview (1 = English, 2 = Spanish).
wtint2yr
Full sample 2-year interview weight.
wtmec2yr
Full sample 2-year MEC exam weight.
sdmvpsu
Masked variance unit pseudo-primary sampling unit variable for variance estimation.
sdmvstra
Masked variance unit pseudo-stratum variable for variance estimation.
ridreth2
Linked NHANES III race/ethnicity (1 = Non-Hispanic White, 2 = Non-Hispanic Black, 3 = Mexican American, 4 = Other Race - Including Multi-Racial, 5 = Other Hispanic).
dmdeduc
Education level for participants age 6 years or older. What is the highest grade or level of school you have completed or the highest degree you have received? (1 = Less than high school, 2 = High school diploma (including GED), 3 = More than high school, 7 = Refused, 9 = Don't Know)
dmdfmsiz
Total number of people in the family (7 indicates 7 or more people).
The variable descriptions above are taken directly from the NHANES website [1].
National Health and Nutrition Examination Survey 2003-2006 [1].
1. Centers for Disease Control and Prevention (CDC). National Center for Health Statistics (NCHS). National Health and Nutrition Examination Survey Data. Hyattsville, MD: US Department of Health and Human Services, Centers for Disease Control and Prevention, 2003-6 http://wwwn.cdc.gov/nchs/nhanes/search/datapage.aspx?Component=Demographics&CycleBeginYear=2003. Accessed July 31, 2014.
Acknowledgment: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903.
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