Table 2 Relation between poor asthma control and independent variables (univariate logistic regression); reference group was patients with ACT ≥ 20

Age (10 year groups)

1.144 - 1.294

<0.0001

Asthma severity (mild/moderate/severe)

2.815 - 4.139

<0.0001

Asthma duration (5 years groups)

1.036 - 1.153

0.0013

Smoke (smokers vs no/ex)

1.124 - 1.932

0.0049

Country (Italy vs Spain)

1.187 - 1.818

0.0004

Gender (male vs female)

0.891 - 1.234

n.s.