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Table 2 Risk factors associated with BRSV in 1243 animals from 26 dairy cattle herds in São Paulo State, Brazil

From: Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil

Factor

BRSV

Relative risk (RR)

Confidence interval (CI) (95%)

p value

Positive

Negative

Limit inferior

Limit superior

Age group

> 12 months (adult)

775

116

1.44

1.32

1.57

< 0.0001

≤12 months (calf)

213

139

BoHV-1

Seropositive

565

85

1.22

1.15

1.29

< 0.0001

Seronegative

423

170

BVDV-1

Seropositive

298

33

1.19

1.13

1.25

< 0.0001

Seronegative

690

222