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Table 2 Final negative binomial regression model to identify variables with influence on faecal egg counts with cattle in five different study areas in South Darfur State, Sudan, during the rainy season

From: Susceptible trichostrongyloid species mask presence of benzimidazole-resistant Haemonchus contortus in cattle

Term Estimate Standard error Statistic P value Risk ratio 95% Confidence interval
Intercept 3.346 0.255 13.142 < 0.0001 28.388 17.591–49.192
Study area: < Ref. Kass       
Beleil 0.522 0.320 1.631 0.1030 1.686 0.886–3.127
Nyala 0.621 0.304 2.043 0.0411 1.860 1.011–3.296
Rehed Al-Birdi 1.430 0.376 3.799 0.0002 4.177 1.999–8.756
 Tulus 0.786 0.322 2.440 0.0147 2.195 1.110–4.275
Age: Ref.: adult       
 Young 1.743 0.232 7.524 < 0.0001 5.716 3.640–9.097
Sex: Ref. female       
 Male 1.634 0.522 3.133 0.0017 5.127 1.997–17.360
Age × sex: Ref: adult; female       
 Young: male − 1.623 0.577 − 2.810 0.0050 0.197 0.055–0.564
  1. Nagelkerke R2 = 0.233