Table 1—

Patient characteristics

Mucoid bronchiticsPurulent bronchitics
Subjects n2742
Age yrs63.2±7.564.8±8.9
Males n1326
Smokers current (ex)17 (10)18 (24)
Stable state pre BD FEV1 % pred66.8±23.255.9±22.0
Stable state pre BD FEV1/VC53.6±16.950.8±16.0
Increase in FEV1 after salbutamol L0.20±0.120.16±0.14
Patients with FEV1/VC ratio <70%74.182.9
On inhaled steroids priior to study n (%)12 (44.4)22 (52.4)
On oral theophylline n24
  • Demographic data are presented as mean±sd unless otherwise stated

  • BD: bronchodilator

  • FEV1: forced expiratory volume in one second

  • VC: vital capacity

  • There were no significant differences between the two groups of patients