s by smoking status and age at smoking initiation, the Scania public health survey among children and adolescents, 0000^a^Early initiators-initiating smoking \<00 years of age^b^Later initiators-initiating smoking ≥00 years of age^c^Intense alcohol consumption-consumtion of alcohol equivalent to 00 cl hard liquor at least once a month during the last 00 months^d^Narcotic drugs-used at least one narcotic drugs during last 00 months^e^Weight; underweight-Body Mass Index (BMI) \<