Table 2 Distribution of daily cigarette smokers, according to selected characteristics of the smoking habit

Total No. of daily cigarette smokers

Age of smoking initiation:

   ≤ 10

   11–13

   14–17

   18–20

   21–25

   > 25

   Missing data

No. of cigarettes smoked daily:

   1–5

   6–10

   11–15

   16–20

   21–40

   > 40

   Missing data

No. of pack/years:

   ≤ 10

   11–20

   21–30

   31–40

   41–50

   51–70

   > 70

   Missing data

Smoking the first cigarette:

   Within 30 min. after awakening

   Later

   Missing data

Smoking a greater No. of cigarettes:

   In the morning

   In the afternoon

   Missing data

Changes in smoking habit in prison:

   Smoking less cig/d. than at liberty

   Smoking more cig/d.

   Smoking the same No. of cig/d.

   Missing data

Awareness of smoking negative impact on health:

   Aware smokers*

   Smokers not contemplating whether smoking is harmful

   Smokers denying health impacts of smoking**

   Missing data