Effects of active tobacco smoking on the prevalence of asthma-like symptoms in adolescents

Figures & data

Table 1 Prevalence (%) and odds ratios (95% CI) of asthma-like symptoms by video questionnaire; reports according to tobacco consumption groups

	Persistent smokers % OR (95% CI)	Ex-smokers % OR (95% CI)	Nonsmokers % OR (95% CI)
Wheezing ever	33.9 1.4 (1.2–1.7)*	28.1 1.1 (0.9–1.3)	26.3 1
Wheezing in the last 12 m	22.7 1.5 (1.3–1.9)*	17.0 1.1 (0.9–1.3)	16 1
Wheezing with exercise, ever	36.7 1.4 (1.1–1.6)*	28.2 0.9 (0.8–1.1)	29.9 1
Wheezing with exercise in the last 12 m	28.9 1.5 (1.3–1.9)*	20.8 1.0 (0.9–1.3)	20.9 1
Wheezing during night, ever	11.1 1.4 (1.1–1.8)†	9.7 1.2 (0.9–1.5)	8.3 1
Wheezing during night in the last 12 m	6.7 1.2 (0.9–1.7)	5.6 1.0 (0.8–1.3)	5.6 1
Cough ever	46.2 1.9 (1.6–2.3)*	32.8 1.1 (0.9–1.3)	30.8 1
Cough, in last 12 m	34.2 1.9 (1.6–2.3)*	23.3 1.1 (0.9–1.3)	21.3 1
Severe asthma crisis, ever	12.0 1.3 (0.9–1.7)	10.3 1.1 (0.8–1.3)	9.6 1
Severe asthma crisis, in the last 12 m	7.6 1.5 (1.1–2.1)‡	6.5 1.3 (0.9–1.7)	5.2 1

Notes: *p < 0.001;

^† p ≤ 0.01;

^‡ p < 0.05; Persistent smokers (n = 768), ex-smokers (n = 1841), and nonsmokers (n = 2129).

Abbreviations: CI, confidence interval; OR, odds ratio.