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Table 1 Bodyweight (BW) and average daily weight gain (ADWG) at different observation periods. Least square mean ± standard error

From: Production results from piglets vaccinated in a field study in Spain with a Type 1 Porcine Respiratory and Reproductive virus modified live vaccine

Parameter Week Group 1 + 2 + 3 Week Group 1 Week Group 2 Week Group 3
Unvaccinated pigs Vaccinated pigs Unvaccinated pigs Vaccinated pigs Unvaccinated pigs Vaccinated pigs Unvaccinated pigs Vaccinated pigs
Number of animals 674 690 214 224 226 230 234 236
BW (kg) at         
 Vaccination 5.8 ± 0.05 5.8 ± 0.05 5.8 ± 0.09 5.7 ± 0.09 5.7 ± 0.09 5.7 ± 0.09 6.1 ± 0.09 6.1 ± 0.09
 4 weeks post-vaccination 14.6 ± 0.10 14.7 ± 0.10 14.4 ± 0.17 14.1 ± 0.17 15.1a ± 0.17 15.6b ± 0.17 14.2 ± 0.17 14.3 ± 0.16
 10 weeks post-vaccination 40.9a ± 0.23 41.5b ± 0.23 40.0 ± 0.41 39.4 ± 0.40 43.3a ± 0.42 44.9b ± 0.41 39.3 ± 0.40 40.4 ± 0.40
 16–17 weeks post-vaccination† 76.6 ± 0.37 76.9 ± 0.37 77.1 ± 0.65 76.4 ± 0.64 81.3 ± 0.66 80.9 ± 0.64 71.3a ± 0.64 73.4b ± 0.63
ADWG (g/d) from vaccination to         
 4 weeks post-vaccination 310 ± 3.5 314 ± 3.4 306 ± 6.1 295 ± 6.0 328a ± 6.1 347b ± 6.0 296 ± 5.9 300 ± 5.9
 10 weeks post-vaccination 486a ± 3.3 495b ± 3.2 474 ± 5.7 465 ± 5.6 519a ± 5.8 542b ± 5.7 465 ± 5.5 479 ± 5.5
 16–17 weeks post-vaccination† 602 ± 3.2 605 ± 3.1 597 ± 5.6 591 ± 5.5 638 ± 5.6 635 ± 5.5 573a ± 5.4 590b ± 5.4
BW homogeneity‡ (%) at         
 16–17 weeks post-vaccination† 85a 86b 86 86 87 87 82a 85b
  1. BW Bodyweight, ADWG Average Daily Weight Gain
  2. † The end of the study was at 17 weeks post-vaccination in week groups 1 and 2, and at 16 weeks post-vaccination in week group 3
  3. ‡ BW homogeneity was calculated from coefficient of variation (1-CV). It was tested comparing variances of BW using an F test
  4. a, b Within week group, different letter in the same row indicates statistically significant difference (p < 0.05). Differences between treatment groups were tested using analysis of variance and subsequent t-tests