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Agreement between bovine respiratory disease scoring systems for pre-weaned dairy calves

  • Sharif S. Aly (a1) (a2), William J. Love (a1), Deniece R. Williams (a1), Terry W. Lehenbauer (a1) (a2), Alison Van Eenennaam (a3), Christiana Drake (a4), Philip H. Kass (a2) and Thomas B. Farver (a2)...

Abstract

Clinical scoring systems have been proposed for respiratory disease diagnosis in calves, including the Wisconsin (WI) system (McGuirk in 2008) which uses five clinical signs, each partitioned into four levels of severity. Recently, we developed the California (CA) bovine respiratory disease (BRD) scoring system requiring less calf handling and consisting of six clinical signs, each classified as normal or abnormal. The objective of this study was to estimate the on-farm agreement between the WI and the CA scoring systems. A total of 100 calves were enrolled on a CA dairy and assessed for BRD case status using the two scoring systems simultaneously. The Kappa coefficient of agreement between these two systems was estimated to be 0.85, which indicated excellent agreement beyond chance. The simpler design and reduced calf handling required by the CA BRD scoring system may make it advantageous for on-farm use.

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Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

*Corresponding author: E-mail: saly@ucdavis.edu

References

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Donovan, GA, Dohoo, IR, Montgomery, DM and Bennett, FL (1998). Calf and disease factors affecting growth in female Holstein calves in Florida, USA. Preventive Veterinary Medicine 33: 110.
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Fleiss, JL, Levin, B and Paik, MC (2003). The measurement of interrater agreement. In: Statistical Methods for Rates and Proportions, (eds) Balding, David J., Cressie, Noel A. C., Fisher, Nicholas I., Johnstone, Iain M., Kadane, J. B., Ryan, Louise M., Scott, David W., Smith, Adrian F. M., Teugels, Jozef L.. 3rd edn.New York, NY: Wiley, p. 604.
Love, WJ, Lehenbauer, TW, Kass, PH, Van Eenennaam, AL and Aly, SS (2014). Development of a novel clinical scoring system for on-farm diagnosis of bovine respiratory disease in pre-weaned dairy calves. Peer Journal 2: e238.
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Warnick, LD, Erb, HN and White, ME (1997). The relationship of calfhood morbidity with survival after calving in 25 New York Holstein herds. Preventive Veterinary Medicine 31: 263273.

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