“…Intermittent smoking has been defi ned as not smoking on a daily basis ( DiFranza et al, 2007 ;Lindstrom, Isacsson, & the Malmo Shoulder-Neck Study Group, 2002 ) or as smoking on 1 -15 days in the previous month ( McCarthy, Zhou, & Hser, 2001 ). Nondaily smoker has been defi ned as smoking at least weekly (but not daily) or less often than weekly; smoking at least 100 cigarettes in the lifetime and currently smoking some days; smoking more than 100 cigarettes in the lifetime, currently smoking some days, and smoking on fewer than 30 of the past 30 days; smoking more than 100 cigarettes in the lifetime and smoking some days or 1 -2 days in the previous 30 days; or smoking fewer than 100 cigarettes in the lifetime and smoking in the previous 30 days ( Gilpin, White, & Pierce, 2005 ;Hassmiller et al, 2003 ;Husten, McCarty, Giovino, Chrismon, & Zhu, 1998 ;Leatherdale, Ahmed, Lovato, Manske, & Jolin, 2007 ;McDermott et al, 2007 ;Tong, Ong, Vittinghoff, & Perez-Stable, 2006 ;Wortley, Husten, Trosclair, Chrismon, & Pederson, 2003 ).…”