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Table 2 Descriptive statistics of the 497 calves over the complete study period (average 154.5 days)

From: Field trial to evaluate the effect of an intranasal respiratory vaccine protocol on bovine respiratory disease incidence and growth in a commercial calf rearing unit

 Total ± SD (min.-max.)Vaccinated ± SD (min.-max.)Unvaccinated ± SD (min.-max.)
n497247250
Average weight at weaning (kg)83.4 ± 12.0 (40.5–126)83.9 ± 12.6 (40.5–122)82.8 ± 11.3 (52.5–126)
Average weight at the end of the study (kg)233.7 ± 25.6 (126–310)233.4 ± 26.2 (146–310)233.9 ± 25.1 (126–302)
Daily gain, milk-feeding period (g/day)630.7 ± 176.6 ((− 40)-1160)641.7 ± 184.6 ((− 40)-1070)619.6 ± 168.1 (150–1160)
Daily gain, complete study period (g/day)1145.7 ± 136.9 (500–1520)1151.9 ± 137.9 (670–1520)1139.5 ± 135.9 (500–1460)
n (enrolled < 17 days of age)261139122
Daily gain, (g/day)1119.7 ± 131.0 (670–1460)1109.3 ± 134.7 (670–1410)1131.5 ± 126.2 (780–1460)
n (enrolled ≥17 days of age)224102122
Daily gain, (g/day)1176.0 ± 137.6 (500–1520) a1209.9 ± 120.3 (880–1520)1147.6 ± 145.0 (500–1460)
Clinical condition (2nd clin. exam) b2.7 ± 1.9 (0–9)2.7 ± 2 (0–8)2.8 ± 1.8 (0–9)
BRD-diagnosis (2nd clin. exam) b206 a91115
Antimicrobial treatments for443233210
BRD226120106
interdigital phlegmon1005545
other inflammation412120
unknown fever763739
Oxytetracycline courses304157147
Benzylpenicillin courses1397663
Time to first medication (days)20.7 ± 18.6 (0–93)21.7 ± 19.2 (0–81)19.6 ± 17.9 (0–93)
Premature death1266
  1. SD standard deviation, BRD Bovine respiratory disease,
  2. a = Variable significantly different between vaccination groups (p < 0.05), b = See the text for detailed description
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