Table 2

Prevalence (%) of self reported asthma, use of asthma medication, coughing and smoking status in responders (n=65 717) and in non-responders (n=326). Nord-Trøndelag, Norway 1997

Self reported symptoms and smoking habitsResponders (%)Non-responders (%)p Value
Ever asthma8.69.10.79
Asthma medication8.09.50.52
Coughing with phlegm8.36.20.08
Chronic bronchitis3.53.00.74
Never smoker44.339.70.10
Current smoker30.235.50.04
  • Prevalence in non-responders age adjusted by direct method standardisation (total study population as reference).