User state | Pattern | Definition |
Current/former users | Persistent use | Use across all time points |
Discontinued use | Use to no use | |
Relapse/reuptake of use | Use, to no use, to use | |
Transition to PTU | Exclusive use to PTU | |
Transition to exclusive use | PTU to exclusive use | |
Switching | Exclusive use to different product use | |
Inconsistent PTU | PTU, to no PTU, to PTU | |
Never users | Persistent never use | Never use across all time points |
Initiate use | Never use to new use |
Definitions may include multiple patterns across time points, for example, discontinued use includes the use, to no use, to no use pattern, as well as the use, to use, to no use pattern; user states and patterns of use can refer to various frequencies of use, for example, current use can refer to past 30-day use or daily use, new use can refer to experimental use or regular use.
PTU, polytobacco use.