Performance parameters† | Age (weeks) | A | B | C | D | P value | A–C (NV) | B–D (V) | P* value |

n=180 | n=180 | n=180 | n=180 | n=360 | n=360 | ||||

Average bodyweight (kg) | 3 | 5.03±1.12 | 5.46±1.09 | 5.12±1.08 | 5.50±1.16 | 0.673 | 5.09±1.10^{A} | 5.48±1.13^{B} | 0.000 |

10 | 23.91±4.24 | 25.81±4.42 | 24.18±4.45 | 24.71±4.84 | 0.051 | 24.07±4.36 | 25.15±4.70 | 0.643 | |

Weight gain (kg) | 3–10 | 18.89±3.79 | 20.32±3.84 | 19.06±3.98 | 19.21±4.25 | 0.055 | 18.99±3.90 | 19.66±4.12 | 0.628 |

ADG (g/pig/day) | 3–10 | 356±72 | 376±71 | 353±74 | 356±79 | 0.321 | 354±73 | 364±76 | 0.131 |

Data from batches A and C were summarised together, taking into account both nursery units (N1 and N2). Data from batches B and D were also summarised together (for N2).

Vaccination status: NV (pigs originating from non-vaccinated sow farrowing batches) and V (pigs originating from vaccinated sow farrowing batches). Values with different superscripts within a row are significantly different (P<0.05 and P*<0.05). The P value refers to the comparisons between the individual farrowing batches and the P* value to the comparisons between the summaries of the NV (A–C) and V (B–D) batches.

†Average daily gain (ADG).