This is what I first thought of as well, but other sources indicate that Asian Americans are actually the demographic with the least overall cigarette use[1]. G

This is what I first thought of as well, but other sources indicate that Asian Americans are actually the demographic with the least overall cigarette use[1]. Given that White and Black Americans use cigarettes at almost twice the rate Asian Americans do, we'd expect strong second-hand correlations for those groups as well. (This source doesn't quantify "use," so there are confounding factors: prevalence of smoking at home, chain smoking vs. social smoking, etc.) [1]: https://smokingcessationleadership.ucsf.edu/racialethnic-minorities https://smokingcessationleadership.ucsf.edu/racialethnic-min...