Gambling starts Young.

TORONTO (Reuters) - Children rated as impulsive by their kindergarten teachers appear more likely to begin gambling behaviors like playing cards or placing bets before they hit middle school, Canadian researchers said on Monday.

"The question has always been, 'What comes before adolescent gambling?'" Pagani said in a telephone interview. Turns out, its pre-school gambling.

After controlling for factors like family composition, parents' education and household income, the researchers found an increase of one unit on the impulsivity scale in kindergarten corresponded to a 25 percent increase in gambling involvement by the sixth grade.