Table 2 Comparison of concomitant medication use in the two groups
Treatmentβ blockers(N = 142)No β blockers(N = 683)p Value
Systemic steroid130 (92)634 (93)0.73
Inhaled steroid7 (5)51 (7)0.37
Antibiotic128 (90)585 (86)0.20
Short-acting β agonist133 (94)657 (96)0.26
Long-acting β agonist8 (6)37 (5)0.92
Short-acting anticholinergic132 (93)647 (95)0.53
Long-acting anticholinergic2 (1)6 (1)0.63
Methylxanthine11 (8)111 (16)0.01
  • Values shown as n (%).