Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5543594 | Preventive Veterinary Medicine | 2017 | 8 Pages |
Abstract
The estimated CM causal hazard ratios were 1.96 [1.57-2.44] and 1.47 [1.28-1.69] for heifers and cows, respectively, and as long as causal assumptions hold. Our findings confirm that CM was a risk factor for culling, but with a reduced effect compared to previous studies, which did not properly control for the presence of time-dependent confounders such as milk yield and somatic cell count. Cows experienced a lower risk for CM, with milk production having more influence on culling risk in cows than heifers.
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Authors
Denis Haine, Hector Delgado, Roger Cue, Asheber Sewalem, Kevin Wade, René Lacroix, Daniel Lefebvre, Julie Arsenault, Ãmile Bouchard, Jocelyn Dubuc,