Table 3

Logistic regression model of risk factors for Hendra virus serostatus in LRFF: coefficients, chi-square p-values and odds ratios with 95% CIs for variables included in the model.

variablecategorycoefficient estimatechi-square p-valueodds ratio95% CI
sex and reproductive statusnon-pregnant femalereference
pregnant female2.74<0.00115.484.41–54.35
lactating female1.380.0103.961.4–11.24
male0.020.9321.020.61–1.71
ageage 019.330.9722×1080–inf
3 months (weaning)2.190.0608.910.91–87.17
6 monthsreference
pre-breeding1.650.1205.190.65–41.38
mature2.650.01114.141.86–107.75
seasonspring 2004reference
autumn 2005−0.700.0750.490.23–1.07
winter 2005−0.970.0070.380.19–0.76
spring 2005−1.85<0.0010.160.07–0.33
autumn 20061.90<0.0016.672.43–18.31