Baseline: All children born 1989 and 1992 in Uppsala county who were assessed by a dental hygienist or clinician during 2003 - 4 as high risk (N = 382).
Age: 12 - 15 yrs.
Gender: 49.5% F (control), 48.4% F (lecture), 56.3% F (Interview)
Ethnicity: Not stated (except 10% immigrant background).
Baseline smoking data: “Smoke”: Lecture 4%; Interview 4%, control 8%; “Use snuff ”: Lecture 6%; Interview 4%, control 5%