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Table 1 Characteristics of 1057 study population, Tehran, 2013–2015

From: Lifetime prevalence and correlates of smoking behavior in Iranian adults’ population; a cross-sectional study

Variables N (%) a
Female gender 544 (51.50)
Age at the time of participant (years); mean (SD) 31.3 (9.33)
Age at the time of participant (Categories)
  < 20 349 (33.05)
 20 to less than 30 362 (34.28)
 30 to less than 40 209 (19.79)
 40–50 136 (12.88)
Marital status
 Single 462 (43.90)
 Married 591 (56.10)
Highest level of education
 Illiterate or primary school (age 7–11 yrs) 26 (2.47)
 Guidance school (age 12–14 yrs) 60 (5.6)
 High school (age 15–18 yrs) 437 (41.34)
 Associate’s or Bachelor’s degree 441 (41.72)
 Master’s degree and higher 93 (8.80)
 Years of education (year); mean (SD) 13.43 (3.26)
  1. a No. (%), except where otherwise indicated. In the case of missing data, the sum of categories is less than 1057