TRR Core: Tier 1 measures in the PhenX Toolkit
| Measure name (PhenX ID#) | Domain/Collection |
| Current Age (10100) | Demographics |
| Ethnicity (10500) | Demographics |
| Race (10600) | Demographics |
| Gender (10700) | Demographics |
| Current Marital Status (10900) | Demographics |
| Current Educational Attainment (11000) | Demographics |
| Current Employment Status (11300) | Demographics |
| Use of Tobacco Products (741400) | TRR: Vector |
| Cigarette Nicotine Dependence (31000) | Alcohol, Tobacco and Other Substances |
| Electronic Nicotine Product Device Type (760100) | TRR Core: Tier 1 |
PhenX, consensus measures for Phenotypes and eXposures; TRR, Tobacco Regulatory Research.