Mean2-1 maximum fall in FEV1, FEF25-75, and PEF in four subjects following challenge with wine of varying sulfite concentrations (study 1)
| Sulfite free (∼20 ppm) | Low sulfite (75 ppm) |
Moderate sulfite (150 ppm) | High sulphite (300 ppm) | |
| FEV1 (%) | –4.4 (–13.2 to 4.4) | –6.5 (–17.9 to 4.9) | –1.4 (–14.2 to 11.3) | –28.7 (–49.7 to –7.7)2-150 |
| FEF25–75 (%) | –10.5 (–34.8 to 13.8) | –11.4 (–38.1 to 15.3) | –1.1 (–34.3 to 32.2) | –48,4 (–81.9 to –14.9)2-160 |
| PEF (%) | –7.2 (–17.2 to 2.8) | –9.4 (–18.5 to –0.2) | –3.2 (–21.9 to 15.6) | –28.3 (–46.7 to –10.0)2-150 |