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Table 2 PNIF values (in L/min) for challenges with grass pollen, birch pollen and house dust mite (HDM)

From: Peak nasal inspiratory flow as outcome for provocation studies in allergen exposure chambers: a GA2LEN study

Pollen Concentration PNIF baseline (±SD) PNIF 30 min (±SD) PNIF 60 min (±SD) PNIF 90 min (±SD) PNIF 120 min (±SD)
Grass Placebo 123.4 (±55.4) 106.8 (±40.4) 109.3 (±44.9) 114.3 (±51.1) 115.2 (±56.3)
4000 grains/m3 130.7 (±54.8) 102.7 (±50.9) 99.3 (±52.7) 95.7 (±52.5) 95.6 (±50.7)
8000 grains/m3 135.5 (±52.7) 98.0 (±50.9) 84.1 (±46.3) 82.5 (±47.6) 96.1 (±48.3)
Birch Placebo 132.5 (±63.1) 118.6 (±58.8) 116.4 (±56.9) 112.7 (±51.2) 117.5 (±56.9)
4000 grains/m3 143.6 (±37.5) 126.1 (±42.4) 118.9 (±41.7) 117.9 (±37.2) 120.2 (±44.2)
8000 grains/m3 140.8 (±43.3) 122.7 (±44.7) 115.6 (±45.6) 119.9 (±40.5) 118.9 (±39.5)
16,000 grains/m3 143.6 (±47.2) 118.6 (±47.8) 110.0 (±43.6) 108.6 (±53.5) 114.6 (±50.3)
HDM Placebo 136.9 (±46.4) 121.9 (±50.1) 106.1 (±52.0) 104.4 (±51.3) X
250 µg/m3 139.4 (±55.1) 95.2 (±38.6) 80.0 (±38.0) 81.5 (±40.2) X
  1. PNIF peak nasal inspiratory flow, SD standard deviation