Table 1. Variable description and prevalence of factors examined.

Variable name	Variable description	Zambia n=2257 weighted %	Uganda n=3215 weighted %
Early alcohol use initiation	Students who were 13 years or younger when they had their first drink of alcohol other than a few sips.	36.4%	21.6%
Problem drinking	Students who ever had a hang-over, felt sick, got into trouble with family or friends, missed school, or got into fights, as a result of drinking alcohol.	45.1%	21.5%
Current alcohol use	Students who had at least one drink containing alcohol on one or more days during the past 30 days.	42.6%	24.1%
Bullying victimization	Students who were bullied on one or more days in the past 30 days.	63.1%	44.3%
Sadness	Students who felt so sad or hopeless almost every day for two weeks or more in a row that they stopped doing their usual activities during the past 12 months.	53.3%	51.4%
No friends	Students who have no close friends.	15.7%	14.7%
Missed school	Students who missed classes or school without permission on one or more days during the past 30 days.	58.5%	46.4%
No parental monitoring	Students whose parents or guardians really knew what they were doing with their free time in the past 30 days.	35.2%	29.8%
Illicit drug use	Students who used drugs during their life.*	36.7%	31.0%

^*The types of drugs included in the questions differed in the two countries. In Uganda the question was asked as follows “During your life, how many times have you used drugs, such as marijuana (njaga or bangi) or opium (njaye) or sniffed aviation fuel? In Zambia the question was asked as follows: During your life, how many times have you used marijuana or hashish (also called daga, ibange, mbanje, or chamba)?