Table 2 Pre-BD lung monitor (FEV1/FEV6 < LLN) against post-BD confirmatory spirometry (FEV1/FVC < LLN).
From: Accuracy of Vitalograph lung monitor as a screening test for COPD in primary care
Spirometry +ve | Spirometry −ve | ||
|---|---|---|---|
Lung monitor +ve | 170 (50.5%) | 2 (1.0%) | 172 |
Lung monitor −ve | 167 (49.6%) | 205 (99.0%) | 372 |
337 | 207 | 544 |
