Prognostic indicators in OA
| Better prognosis | |
| Individual | Younger age. Normal BMI. Higher level of education. No childhood asthma. Short duration of work-related symptoms. No dependents. |
| Medical | Normal spirometry. Mild NSBHR. NSBHR recovery <2 years. No sputum production. |
| Workplace | Skilled work role. Cessation of exposure. |
BMI, body mass index; NSBHR, non-specific bronchial hyper-responsiveness; OA, occupational asthma.