The 10 Host: Biobehavioral measures recommended and approved for inclusion in the PhenX Toolkit
| Measure name (PhenX id) | Description of measurement protocol |
| Amount, Type, and Frequency of Recent Cigarette Use (720101) | Self-based, interviewer-based or computer-based protocol to assess the use of single or multiple tobacco products over 7 days to 2 years prior to the interview |
| Biomarkers–Cotinine in Serum (91703) | Laboratory-based protocol to measure serum cotinine |
| Biomarkers–Expired Carbon Monoxide (720301) | Interviewer-administered protocol to collect CO samples |
| Biomarkers–NNAL in Urine (720401) | Laboratory-based protocol for the detection of tobacco-specific alkaloids in urine |
| Cue Reaction to Tobacco Stimuli (720501) | Interviewer-based protocol to assess a participant’s reactions to tobacco-related stimuli |
| Flavor preference–e-Cigarette Adult & Youth (720601 & 720602) | Adult—Self-administered questionnaire to determine flavour preference when using e-cigarette products Youth—Self-administered questionnaire to determine flavour preference when using e-cigarettes |
| Pregnancy Status and Tobacco Use (720801) | Self-based or interviewer-based protocol to assess pregnancy history and the use of tobacco and other substances during pregnancy |
| Pregnancy Status–Mother and Baby Health (720901) | Self-administered protocol to assess problems during pregnancy and after childbirth |
| Withdrawal from Tobacco Use (721001) | Self-based and observation-based protocol to assess symptoms of withdrawal from tobacco use |
CO, carbon monoxide; NNAL, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol.