'Smoke-free Class Competition': far-reaching conclusions based on weak data.

摘要

The "Smoke-free Class Competition (SFC)" is a European low-level school-based smoking prevention campaign. Classes commit themselves to stay smoke-free for a duration of 6 months (from fall to spring). Those classes that refrain from smoking take part in a prize draw, where they can win a number of attractive prizes, the main prize being a trip to another European country (Hanewinkel et al., 1998).