Variables Number %
Mode of transmission    
Sexual intercourse 394 100
Blood transmission 394 100
Mother to child 306 77.6
Contaminated injection 226 57.3
From asymptomatic person 274 69.5
Mode of prevention    
Abstinence 344 87.3
With one faithful partner 285 72.3
Condom use 394 100
Alcohol conception    
Never Drunk 332 84.3
Drunk 62 15.7
Khat chewing:    
Never chewed 372 94.4
Chewed 22 5.6
Cigarette Smoking:    
Never Smoke 346 87.8
Smoked 48 12.2
Shisha/Cannabis use    
Never used 394 100
Table 3: knowledge on HIV/AIDS transmission and prevention and magnitude of substance use Mettu Town, May 2013.