s *n* = 0000Early initiators^a^Later initiators^b^Never smokersFormer smokersCurrent smokersFormer smokersCurrent smokers*n* = 0000 (00 %)*n* = 000 (0 %)*n* = 000 (00 %)*n* = 000 (0 %)*n* = 000 (00 %)Sociodemographic factors (%)Parental country of birth  Both parents born in Sweden0000000000  One parent born in Sweden0000000000  Both parents born abroad0000000000Parental employment  Both parents working0000000000  One parent working0000000000  No parent working00000Health related lifestyle factors (%)  Intense alcohol consumption^c^0000000000  Narcotic drugs last 00 months^d^000000000Psychosocial factors (%) Not easy to talk to parents if problems0000000000 Not easy to talk to friends if problems0000000000Health related symptoms (%) Weight^e^  Underweight00000  Normal weight0000000000  Overweight0000000000  Obesity00000 Functional disability^f^0000000000 Poor self-rated hea