Table 4

Prognostic indicators in OA

Better prognosis
IndividualYounger age.
Normal BMI.
Higher level of education.
No childhood asthma.
Short duration of work-related symptoms.
No dependents.
MedicalNormal spirometry.
NSBHR recovery <2 years.
No sputum production.
WorkplaceSkilled work role.
Cessation of exposure.
  • BMI, body mass index; NSBHR, non-specific bronchial hyper-responsiveness; OA, occupational asthma.