Table 1 Participant characteristics

Male

11

Age range (mean)

18 – 53 (33)

Currently sleeping

 In a hostel or winter shelter

6

 Rough (on streets)

5

 Sofa surfing*

4

Concurrent (multiple) substance use

 Alcohol

8

 Heroin

4

 Crack

4

 Cannabis

6

 Amphetamine

3

 Methadone

6

 Currently receiving treatment for drug or alcohol misuse

9

Age started smoking

 <16

15

 Median age started smoking

13

 Average number of cigarettes smoked daily (range)

20 (6–50)