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. 2020 Jan 23;6:4. doi: 10.1186/s40813-019-0141-x

Table 2.

Categorisation of farms prior to vaccination and respective means of return to oestrus rate after vaccination

category (range of return to oestrus rate) n decrease of the return to oestrus rate on n farms (%) mean decrease of the return to oestrus rate by X% (SD)
1 (<  10%) 43 25 (58.1%) 1.56 (1.43)a
2 (≥ 10% - < 20%) 66 52 (78.8%) 4.49 (2.87)b
3 (≥ 20%) 22 21 (95.5%) 10.97 (5.4)c

n = number of farms X = average decrease in the return to oestrus rate in the respective category after immunisation abc groups with different superscripts had significantly different results(p < 0.05)