Validation of a digital audio recording method for the objective assessment of cough in the horse.
OBJECTIVE
To validate the use of digital audio recording and analysis for quantification of coughing in horses.


METHODS
Part A: Nine simultaneous digital audio and video recordings were collected individually from seven stabled horses over a 1 h period using a digital audio recorder attached to the halter. Audio files were analysed using audio analysis software. Video and audio recordings were analysed for cough count and timing by two blinded operators on two occasions using a randomised study design for determination of intra-operator and inter-operator agreement. Part B: Seventy-eight hours of audio recordings obtained from nine horses were analysed once by two blinded operators to assess inter-operator repeatability on a larger sample.


CONCLUSIONS
Part A: There was complete agreement between audio and video analyses and inter- and intra-operator analyses. Part B: There was >97% agreement between operators on number and timing of 727 coughs recorded over 78 h. The results of this study suggest that the cough monitor methodology used has excellent sensitivity and specificity for the objective assessment of cough in horses and intra- and inter-operator variability of recorded coughs is minimal.
Duz
M
M
Weipers Centre for Equine Welfare, Institute of Comparative Medicine, Faculty of Veterinary Medicine, University of Glasgow, 464 Bearsden Road, Glasgow G61 1QH, United Kingdom. M.Duz@vet.gla.ac.uk
Whittaker
A G
AG
Love
S
S
Parkin
T D H
TD
Hughes
K J
KJ
D000818:Animals; D003371:Cough / Q000175:diagnosis / Q000662:veterinary*; D003936:Diagnosis, Computer-Assisted / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000175:diagnosis*; D006736:Horses; D008171:Lung Diseases / Q000175:diagnosis / Q000662:veterinary; D008297:Male; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*