Table 3.
Patterns of diagnostic tool use
| Baseline n (%) |
Follow-up n (%) |
|
|---|---|---|
| High resolution computed tomography | 4473 (39.9) | 5468 (48.8) |
| Pulmonary function test | 4901 (43.7) | 5430 (48.5) |
| Lung biopsy | 1423 (12.7) | 1100 (9.8) |
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