The fluid volume and analyte concentrations obtained by the four sampling techniques employed
| NL | NSB | FPM | PFST | |
| Volume mL | 6.9±1.3 | 1.4±0.3 | 0.32±0.29 | 0.53±0.44 |
| TP µg·mL−1 | 247±230 | 760±730 | 11150±9600 | 14100±13160 |
| LTF µg·mL−1 | 5.8±5.5 | 12.6±12.8 | 106±65 | 113±79 |
| IL-1β pg·mL−1 | 15±13 | 36±29 | 93±89 | 128±110 |
| IL-8 pg·mL−1 | 540±600 | 1560±1730 | 4860±4740 | 6570±5100 |
| TNF pg·mL−1 | 2.4±1.8 | 5.6±5.8 | 22.1±27.9 | 18.9±19.6 |
| ECP pg·mL−1 | 12±17 | 81±118 | 175±240 | 55.4±44.5 |
Data are presented as mean±sd
Only samples with analyte concentrations above the lower detection limit of the assays are presented
NL: nasal lavage
NSB: nasal spray blow technique
FPM: filter paper method
PFST: polyurethane foam sampler technique
TP: total protein
LTF: lactoferrin
IL: interleukin
ECP: eosinophil cationic protein