Age : m = @ ( @ ) years , follicle stimulating hormone : m = @ ( @ ) , body mass index ( BMI ) : m = @ ( @ ) , daily smoking rate : m = @ ( @ ) , for m = @ ( @ ) years , Fagerstrm Test for Nicotine Dependence ( FTND ) : m = @ ( @ ) , and carbon monoxide : m = @ ( @ ) ppm .