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)