| DMDBORN | In what country {were you/was SP} born? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDCITZN | {Are you/Is SP} a citizen of the United States? [Information about citizenship is being collected by the U.S. Public Health Service to perform health related research. Providing this information is voluntary and is collected under the authority of the Public Health Service Act. There will be no effect on pending immigration or citizenship petitions.] | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDEDUC | (SP Interview Version) What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDEDUC2 | (SP Interview Version) What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDEDUC3 | (SP Interview Version) What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHHSIZ | Total number of people in the Household | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHRAGE | Age in years of the household reference person at the time of HH screening. Individuals 85 and over are topcoded at 85 years of age. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHRBRN | In what country {were you/was NON-SP Head} born? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHREDU | What is the highest grade or level of school {you have/NON_SP HEAD has} received? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHRGND | Gender of the household reference person | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHRMAR | Marital Status of household reference person | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDHSEDU | What is the highest grade or level of school {you have/NON-SP SPOUSE has completed or the highest degree {you have/he/she has} received | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDMARTL | Marital Status | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDSCHOL | {Are you/Is SP} now . . . | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMDYRSUS | Length of time SP has been in the US. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| DMQMILIT | Did {you/SP} ever serve in the Armed Forces of the United States? | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| INDFMINC | Total family income (reported as a range value in dollars) | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| INDFMPIR | Poverty income ratio (PIR) - a ratio of family income to poverty threshold | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| INDHHINC | Total household income (reported as a range value in dollars) | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIAGENDR | Gender of the sample person | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDAGEEX | Best age in months at date of examination for individuals under 85 years of age at screening. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDAGEMN | Best age in months at date of screening for individuals under 85 years of age. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDAGEYR | Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDEXMON | Six month time period when the examination was performed - two categories: November 1 through April 30, May 1 through October 31. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDEXPRG | Pregnancy status at the time of MEC exam. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDPREG | Pregnancy status variable based on all source data. NOTE: This is the previous pregnancy status recode variable. RIDPREG is a more conservative pregnancy status variable. Please review the file documentation. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDRETH1 | Recode of reported race and ethnicity information. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDRETH2 | Linked NH3 Race and Ethnicity Recode. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| RIDSTATR | Interview and Examination Status of the Sample Person. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| SDDSRVYR | Data Release Number. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| SDMVPSU | Masked Variance Unit Pseudo-PSU variable for variance estimation | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| SDMVSTRA | Masked Variance Unit Pseudo-Stratum variable for variance estimation | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| SEQN | Respondent sequence number. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| WTINT2YR | Interviewed Sample Persons. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| WTINT4YR | Interviewed Sample Persons. Used for 1999-2002 data collection years only. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| WTMEC2YR | Both Interviewed and MEC Examined Sample Persons. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |
| WTMEC4YR | Both Interviewed and MEC Examined Sample Persons. Used for 1999-2002 data collection years only. | DEMO_B | Demographic Variables & Sample Weights | 2001 | 2002 | Demographics | None |