Fig. 2

Forest plot showing odds ratios (with 95% confidence intervals) for the final logistic regression model for explanatory variable potentially influencing the odds to be positive in the Anoplocephala serum ELISA. For the bivariate variables pasture cleaning (daily removal of faeces), pasture change (regular change between different pastures) and foals present (at least one foal on farm) the reference level is “no”. For multilevel variables, the reference level is given in the figure. Metric variables included are the pasture area (in ha/horse), number of horses on the farm, faecal egg counts (FEC) of strongyle nematodes, and age of the horse (in years). The variable pasture access was divided in the levels: always pasture, i.e. permanent access to pasture during the grazing season (reference category); sometimes pasture access (hourly access to the pasture during grazing season); and no pasture access (no pasture access at all). For the variable last anthelmintic treatment, the only level including the highly cestocidal drug praziquantel, which was always given in combination with ivermectin (IVM), was chosen as reference. *P < 0.05, **P < 0.01, ***P < 0.001