Table 4. Combined screening methods.a .
| Patient status | (N = 246) |
|---|---|
| Normal chest X-ray and normal spirometry | 108 (42.2) |
| Abnormal chest X-ray and normal spirometry | 64 (27.2) |
| Normal chest X-ray and abnormal spirometry | 28 (11.4) |
| Abnormal chest X-ray and abnormal spirometry | 46 (18.7) |
| Hyperinflation on chest X-ray | 61 (24.8) |
| Normal spirometry findingsb | 38 (62.3) |
| Obstructive pattern on spirometryb | 16 (26.2) |
| Restrictive pattern on spirometryb | 2 (3.3) |
| Interstitial pattern on chest X-ray | 36 (14.6) |
| Normal spirometry findingsc | 18 (50.0) |
| Restrictive pattern on spirometryc | 11 (30.6) |
| Obstructive pattern on spirometryc | 2 (5.6) |
| Any abnormalityd | 145 (58.9) |
a
Values expressed as n (%). bn = 61. cn = 36. dOn any one of the three diagnostic tests applied (chest X-ray, spirometry, or pulse oximetry).