TABLE 1

Descriptive statistics for age at death of the four groups of dogs and results of survival analysis

GroupDescriptive statisticsSurvival analysis
NMedian age*(Min-Max)NMST†(95% CI)
Longevity study3914.01a(9.68–17.90)3914.01a(13.18 to 14.77)
KC survey57412.25b(0.17–19.00)54212.58b(12.17 to 12.92)
‘Restricted’2412.95b(4.30–14.56)2412.90b(12.38 to 13.40)
‘Control’2411.16b(3.50–13.29)2411.14c(10.80 to 11.99)
  • *Kruskal-Wallis analysis of variance (P< 0.0001) with post hoc Dunn’s pairwise comparisons: median ages with different superscripts are significantly different from one another.

  • †MST; Kaplan-Meier log rank P<0.0001; MSTs with different superscripts are significantly different from one another (P≤0.004).

  • CI, confidence interval; KC, Kennel Club; MST, median survival time.