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Table 3 Parameter estimates from the regression model with a seasonal component corresponding to a 12 month cycle, for proportion of impaction colics per month between January 2000 and March 2005.

From: Epidemiology of impaction colic in donkeys in the UK

  Parameter estimate Lower 95% CI Upper 95% CI P-value
Intercept -5.92 -6.02 -5.83  
Sin 12 -0.08 -0.22 0.05 0.2
Cos 12 0.19 0.05 0.32 0.006