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Table 3 Prevalence rates reported according to classes of eggs per gram (EPG) for the 435 horses shedding Parascaris spp. eggs (P-value <  0.0001)

From: Parascaris spp. eggs in horses of Italy: a large-scale epidemiological analysis of the egg excretion and conditioning factors

EPG classes Positives horses Prevalence % Odds ratio (95% CI)
≤ 50 EPG 135 31.0 1.00 (0.79–1.25)
> 50 ≤ 200 EPG 124 28.5 0.89 (0.71–1.12)
> 200 ≤ 500 EPG 77 17.7 0.48 (0.37–0.62)
> 500 ≤ 1000 EPG 39 9.0 0.22 (0.16–0.31)
> 1000 ≤ 2000 EPG 32 7.4 0.18 (0.12–0.26)
> 2000 EPG 28 6.4 0.15 (0.10–0.22)
  1. EPG: eggs per gram; 95% CI: 95% confidence interval