When presenting the information to your girlfriend, please be completely honest and make sure to also show the Important Note that the researchers put at the front.

Important note: smoking may offer a limited degree of protection in some individuals against the development of a small number of diseases, outlined below. However, this information is of little relevance to public health, given that the amount of disease that tobacco may be said to prevent is insignificant in comparison with the far greater incidence of disease caused by smoking. Tobacco products kill one in two of their long-term users.

Half of long-term smokers die to smoking. Even if you think you can quit, the point of this study is to show that even having looked for benefits, they could only find a negligible amount of benefits compared to the harms of smoking.