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Table 2 Comparison of mean C2 measured by KoKo DigiDoser and Mefar dosimeter.

From: Validation of the ERS standard citric acid cough challenge in healthy adult volunteers

Time point KoKo DigiDoser (n = 39) Mefar Dosimeter (n = 39) P value
  Mean C2 log mM ± SD
(95%CI)
Mean C2 log mM ± SD
(95%CI)
 
Baseline 2.42 ± 0.35 (2.30-2.53) 2.32 ± 0.43 (2.18-2.46) 0.205
1 hr 2.45 ± 0.38 (2.32-2.57) 2.50 ± 0.39 (2.37-2.63) 0.455
2 hr 2.48 ± 0.37 (2.36-2.60) 2.51 ± 0.42 (2.38-2.66) 0.556
4 hr 2.45 ± 0.33 (2.34-2.55) 2.53 ± 0.41 (2.40-2.66) 0.174
2 wk 2.37 ± 0.39 (2.24-2.50) 2.45 ± 0.39 (2.32,2.58) 0.179
  1. P value based on paired ttest