Table 2—

Prevalence of chest symptoms by smoking habit

NonsmokerExsmokerCurrent smokerTotal
<10 pack-yrs10–19 pack-yrs20–29 pack-yrs>30 pack-yrs
Subjects n15734281230019041216112622561
Wheeze2.0 (1.9–2.1)22.1 (20.0–24.1)1.5 (1.3–1.7)2.2 (1.9–2.5)4.5 (4.0–5.0)7.5 (6.9–8.2)2.6 (2.5–2.7)
Chest tightness1.5 (1.4–1.6)13.9 (12.1–15.6)0.8 (0.7–1.0)1.5 (1.3–1.8)2.6 (2.2–3.0)3.2 (2.7–3.6)1.7 (1.7–1.8)
Nocturnal SOB1.0 (1.0–1.1)14.2 (12.4–16.0)0.9 (0.7–1.0)1.0 (0.8–1.2)1.6 (1.3–2.0)3.9 (3.4–4.4)1.4 (1.3–1.4)
Nocturnal cough2.0 (1.9–2.0)18.5 (16.6–20.4)1.8 (1.6–2.0)2.5 (2.2–2.8)4.4 (3.9–4.8)7.4 (6.8–8.0)2.6 (2.5–2.7)
Asthma attack1.5 (1.4–1.6)18.5 (16.6–20.4)1.0 (0.9–1.2)1.1 (0.9–1.3)2.7 (2.3–3.1)5.1 (4.5–5.6)1.9 (1.8–1.9)
Asthma medication1.1 (1.0–1.1)14.9 (13.1–16.7)0.9 (0.7–1.0)0.7 (0.6–0.9)2.1 (1.7–2.4)3.7 (3.3–4.2)1.4 (1.3–1.4)
Chronic cough1.0 (1.0–1.1)16.7 (14.8–18.5)1.6 (1.4–1.8)1.8 (1.6–2.1)4.3 (3.8–4.7)8.4 (7.8–9.1)1.9 (1.8–2.0)
Chronic phlegm1.0 (1.0–1.1)15.7 (13.8–17.4)1.5 (1.3–1.7)1.9 (1.6–2.1)4.4 (3.9–4.8)8.4 (7.8–9.1)1.9 (1.8–1.9)
  • Data are presented as percentages (95% confidence interval)

  • SOB: shortness of breath