• Data reference period
• Place of residence (Portugal)
• Sex
• Age group

• AGE GROUP:  The age interval in years to which a person belongs at the time of reference.
• RESIDENT POPULATION:  Set of persons who, regardless of being present or absent in a given housing unit at the moment of observation, have lived in the place of their usual residence for a continuous period of 12 months prior to the moment of observation, or have arrived to the place of their usual residence during the period of 12 months prior to the moment of observation, with the purpose of living there for a year, at least.
• SEX:  Biological and physiological characteristics that define men and women.
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).

(Resident population aged 15 and and more years old who smokes/ Resident population aged 15 and over)*100