TABLE 1:

Prevalence of ketosis

GroupsApparent prevalence95% CITrue prevalence95% CI
Production <9000 kg0.340.28 to 0.400.440.35 to 0.52
Production >9000 kg0.380.33 to 0.430.490.41 to 0.57
Herd size <500 cows0.340.28 to 0.410.440.35 to 0.53
Herd size 500–1000 cows0.320.26 to 0.390.410.33 to 0.50
Herd size >1000 cows0.460.38 to 0.550.610.49 to 0.74