[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4883191/
[1] https://www.nhs.uk/news/medication/widely-used-class-drugs-l...
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4883191/
[1] https://www.nhs.uk/news/medication/widely-used-class-drugs-l...
Your reference only studied people who took Z-drugs, benzodiazepines, or no medications, and says nothing about OTC sleep medications. There are no OTC Z-drugs or benzos on the market.
The paper also notes that only chronic use of Z-drugs and benzos were associated with increases in mortality, and not intermittent use of Z-drugs. Even then, they issue a disclaimer about drawing such conclusions:
> In short, while no relation with mortality for intermittent users of Z-drugs was found, the current study showed that use of benzodiazepines and chronic usage of Z-drugs both were associated with increased risk of all-cause mortality. Most of the effect estimates were reduced, but remained significant, after adjusting for confounding factors (except for Z-drugs). However, the low numbers of individuals reporting chronic usage indicate that the data should be interpreted cautiously.