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Table 4 Comparison of cough rates counted from positive algorithm files with original full files and comparison of cough rates counted from positive plus negative files with original full files; all data are median (inter-quartile range)

From: Data reduction for cough studies using distribution of audio frequency content

  Overall Healthy volunteers Chronic cough COPD Asthma
(n = 20) (n = 5) (n = 5) (n = 5) (n = 5)
Algorithm Difference (B-A) 0.0c/h (-1.2 to 0.4) 0.0c/h (0.0 to 0.2) 0.0c/h (-0.2 to 2.8) 0.0c/h (-2.5 to 1.4) -3.2c/h (-6.2 to -0.2)
Manual Counters Difference (D-A) 0.0c/h (-0.4 to 0.4) 0.0c/h (0.0 to 0.2) 0.3c/h (-0.2 to 2.8) 0.0c/h (-2.5 to 1.6) -0.4c/h (-3.2 to 0.4)
Algorithm Absolute deviation (B-A) 0.6c/h (0.0 to 2.9) 0.0c/h (0.0 to 0.2) 0.4c/h (0.0 to 2.8) 1.3c/h (0.4 to 2.8) 3.2c/h (0.6 to 6.2)
Manual Counters Absolute deviation Abs(D-A) 0.4c/h (0.0 to 2.0) 0.0c/h (0.0 to 0.2) 0.36c/h (0.2 to 2.8) 1.3c/h (0.6 to 2.8) 0.4c/h (0.4 to 3.2)