Age : m = 52.3 ( 7.8 ) years , follicle stimulating hormone : m = 42.6 ( 25.7 ) , body mass index ( BMI ) : m = 27.4 ( 6.2 ) , daily smoking rate : m = 20.3 ( 11.5 ) , for m = 29.4 ( 10.7 ) years , Fagerstrm Test for Nicotine Dependence ( FTND ) : m = 6.4 ( 2.1 ) , and carbon monoxide : m = 23.8 ( 13.0 ) ppm .