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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