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. 2019 Aug 20;9(8):582. doi: 10.3390/ani9080582

Table 2.

Differences in tail biting outbreaks between the two trials.

Comparisons Trial 1 Trial 2 Test p-Value
Pens with outbreaks 22 12 X2 (1, N = 96) = 4.55 0.03
Pens with recurring outbreaks 4 (18.2%) 2 (16.7%) - -
Pens with slow outbreaks (>72 h) 5 (19.2%) 3 (21.4%) X2 (1, N = 40) = 0.03 0.87
Mean duration of outbreaks (d) 19.6 13.3 t (34) = 2.28 0.03
Successful interventions (%) 76.92 85.71 X2 (1, N = 40) = 0.44 0.51
Interventions used (median) 2 1 U (N1 = 26, N2 = 14) = 267 0.58