highly significantp<0.001
The effect of study year on CPXV seroprevalence (by χ2/d.f.) was highly significant (χ 2 2 31.2; p<0.001); seroprevalence was 2.7 times higher among bank voles sampled in 2010 (36.1% [95% CI 31.7%–40.7%]) than in 2002 (13.1% [7.4%–21.0%]).