People who are stressed out have hypertension and will look for ways to take stress away specifically using marijuana for that purpose. I wonder if that was fac

People who are stressed out have hypertension and will look for ways to take stress away specifically using marijuana for that purpose. I wonder if that was factored in as you might have a pre-existing condition to make you more susceptible to hypertension. This type of study is questionable to me as it would be better to have a controlled double-blind study rather than manipulating data alone via questionaire.