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Table 2 The impact of omitting outliers from mean post-treatment faecal egg counts on the efficacy of drug treatment

From: Control of Nematodirus spp. infection by sheep flock owners in Northern Ireland

Flock code AnthelminticGroup Unadjusted Corrected
   Mean ± S.E.M. Efficacy (%) (C.I.) Mean ± S.E.M. Efficacy (%) (C.I.)
1 AVM 5.3 ± 5.3 94 (48, 99) 0 ± 0 100 (100,100)
3 BZ 6.7 ± 4.9 98 (90, 99) 0 ± 0 100 (100,100)
10 BZ 30.3 ± 30.3 90 (11, 99) 0 ± 0 100 (100,100)
  1. AVM avermectin, BZ benzimidazole, C.I. Confidence Intervals, Corrected outliers omitted from calculations, S.E.M. Standard Error about the Mean, Unadjusted with outliers included in calculations