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PLoS One 7(6):e39189 Al Shemmari N, Shaikh RB, Sreedharan J (2015) Prevalence of dokha use among secondary school students in Ajman, United Arab Emirates

Some use and age signs

Conclusion Misreporting prevalence and underreporting smoking intensity in surveys have been documented in the literature, but the level of discrepancy is generally smaller than the discrepancy observed in the Swiss surveys on smoking, where reported consumption from AMIS and SHS survey results explain only about 55% of actual consumption of cigarettes

the Global Adult Tobacco Survey (GATS), which was added in 2007, is a household survey that monitors use among adults