Table 1—

Techniques to be considered for investigation of asthma-related comorbidities

Allergy skin testing
Sinus radiography/computed tomography
Sputum bacteriological testing
Therapeutic trial of GERD with proton pump inhibitor or pH probe
Sleep studies
Precipitins for Aspergillus
Pulmonary function tests (including lung volume and DL,CO)
Chest radiography/computed tomography
Bronchoscopy with or without bronchoalveolar lavage
Psychological evaluation
Induced sputum cell counts
  • Additional tests may be required. GERD: gastro-oesophageal reflux disease; DL,CO: diffusion capacity of the lung for carbon monoxide.