Current prevalence of waterpipe and cigarette smoking, and frequency of use among users in India, Russia, Egypt and Vietnam.

Note: % = prevalence of current (daily or weekly) smoking, No/W = mean number waterpipe sessions/cigarettes per week among current users; Russia education: 1) Completed secondary or less; 2) Completed higher than secondary; Russia occupation: omitted due to very low/no respondents in other categories.