Yes, though that's mostly rolled up in the gender statistics. Men are far more likely smokers than women in China.

Mentioned in TFA.

I don't know of any studies looking specifically at smoking vs non-smoking, but its been highly speculated to be a strong risk factor. Apparently, there is a big gap in prevalence of smoking between men and women in China (close 50% for men, closer to 5% for women), which is thought to be at least partially an explanation for the differences in deaths (2/3rds of deaths were male, 1/3 were female).

There's this paper: https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.14238

"Low prevalence of smokers, and no allergic diseases despite of drug hypersensitivity and urticaria was self-reported by any patients, indicating that allergic diseases and smoking history may not be the susceptible factors for COVID-19."

And this one: https://www.medrxiv.org/content/10.1101/2020.02.05.20020107v...

"Together, this study indicates that smokers especially former smokers may be more susceptible to 2019-nCov and have infection paths different with non-smokers."

They reach opposite conclusions.