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Table 1 Description of the under 21 year-old cohorts that initiated daily, 2001–2005 and 2006-2010

From: The effect of policies regulating tobacco consumption on smoking initiation and cessation in Spain: is it equal across socioeconomic groups?

Dependent Variables ENS06
period 2001–2005
N = 1991
ENS11
period 2006–2010
N = 1421
Initiation as a daily smoker Proportion (IC 95%) Observations Proportion (IC 95%) Observations
Yes 0.25 (0.23;0.27) 499 0.19 (0.17;0.21) 268
No 0.75 (0.73;0.77) 1492 0.81 (0.79;0.83) 1153
Pearson chi2(1) = 18.31 Pr = 0.000
Independent variables at the time of the survey Average proportion Observations Average proportion Observations
Average age 20.38 1991 20.50 1421
Women 0.52 1991 0.51 1421
Social Class:
 Class I-II 0.19 377 0.18 238
 Class III 0.23 449 0.17 234
 Class IV-V 0.43 844 0.47 631
 Class VI 0.14 275 0.18 238
 Resident in the Canary Islands, Ceuta or Melilla 0.06 1991 0.07 1421
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