Table 7—

Comparison of general respiratory symptoms in swimming pool employees and general respiratory symptoms in the general Dutch population, ELON(n = 2711), adjusted for age, smoking and sex

General respiratory symptomsAdjusted
Problems with breathing2.2 (1.8–2.8)*
 Yes, constantly3.4 (1.9–5.9)*
 Frequently, but it always improves1.3 (1.0–1.7)
 Very rarely2.2 (1.7–2.7)*
Cough during last 12 months1.3 (1.0–1.7)
Phlegm during last 12 months1.8 (1.3–2.4)*
Tightness of chest during last 12 months1.4 (>1.0–1.8)*
Dyspnoea when walking on a flat surface with people of the same age7.2 (5.2–9.9)*
Wheeze during last 12 months0.8 (0.6–0.97)
Wheeze and shortness of breath during last 12 months0.9 (0.7–1.2)
Have you ever had asthma?2.4 (1.8–3.3)*
Was it doctor diagnosed?2.1 (1.5–3.0)*
Asthma attack during last 12 months2.6 (1.5–4.6)*
Woken up by shortness of breath during last 12 months1.5 (1.1–2.1)*
Shortness of breath after exercise during last 12 months1.0 (0.7–1.3)
Asthma medication during last 12 months3.6 (2.4–5.3)*
  • Data are presented as odds ratio (95% confidence interval). *: p<0.05.