Table 1

The amount and duration of smoking in acne and control patients

Smoking habit

Acne patients (12)

Control patients (27)


Amount

1 cigarette per week

2

5

1–6 cigarettes per week

2

9

> 6 cigarettes per week

8

12

Not mentioned

0

1


Duration

< 3 months

1

2

3 months – 3 years

6

7

> 3 years

5

16

Not mentioned

0

2


Firooz et al. BMC Dermatology 2005 5:2   doi:10.1186/1471-5945-5-2

Open Data