I am confused with the R02_AExx, R02_AOxx, R02R_xxx_ECIG, and R02R_xxxx_EPRODS variables at Wave 2.
In the codebook, it seems like R02_AExx (regular) and R02R_xxx_ECIG (derived) are e-cigarette related variables and I assumed that R02_AOxx and R02R_xxxx_EPRODS are about electronic nicotine products OTHER THAN e-cigarettes.
But I am not sure whether R02_AOxx and R02R_xxxx_EPRODS refer to the same products: electronic nicotine products OTHER THAN e-cigarettes.
The source of confusion was from the inconsistency of the numbers.
For example, the codebook states that R02_AOxx variables are about electronic nicotine product (other than e-cigarettes) and the number of people who used electronic nicotine product (other than e-cigarettes) fairly regularly (R02_AO1100) is 325.
However, the number of people who (Wave 2 Adult respondents) have ever used any electronic nicotine
products fairly regularly, AND currently use every day or some days' (R02R_A_CUR_ESTD_EPRODS) is 1906 which is way greater than 325.
I do not think this makes sense and am afraid that maybe R02R_xxxx_EPRODS (derived) variables are not about electronic nicotine product (other than e-cigarettes) but about both e-cigarettes AND other electronic nicotine products. Please let me know if I am thinking something incorrectly.