Herd-level risk factors associated with cow mortality in Swedish dairy herds.

However, neither the increased herd size nor increased use of SH cows can be the only reasons for the increasing mortality, although both factors are identified as risk factors in our analyses, because also the MR ratios from the multivariable analyses ( Table 4 ) show an increasing trend over the years.

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The goodness-of-fit tests for both models were highly significant, indicating lack of fit, but the tests were nonsignificant ( P > 0.24) when running the models excluding the observations with the highest MR.

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