marginally significantp =0.06
However, the ANOVA for sleep interval duration revealed a marginally significant main effect of age (F(1, 27)=3.86, p =0.06) and a significant main effect of vDNMP (F(2, 27)=2.32, p =0.03), in which the MMP dogs had the longest sleep interval, whereas the oldest dogs (11–16 yrs) had the shortest sleep interval.