Most of the information on this subject appears to come from the work of Pourmand G, Alidaee MR, Rasuli S, Maleki A, Mehrsai A. at the Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
The severity of ED correlated significantly with the level of exposure to smoking
Source: Do cigarette smokers with erectile dysfunction benefit from stopping?: a prospective study.
There is a strong association between the intensity of cigarette smoking and degree of ED. Stopping cigarette smoking can improve ED in a considerable proportion of smokers. Age and the severity of ED before stopping are inversely related to the chance of improvement.
The Authors of the study make no reference to the type of cigarette smoked, they used the pack-years measure to estimate the level of exposure to smoking.
We assessed whether there was a significant correlation between pack-years and the severity of ED