Table 3.

Mean ages and body weights for the three longevity groups of dogs in July 2004

Longevity category	N	Mean body weight (kg)	SD	Min–max	Mean age (years)	SD	Min–max
Expected (≥9 to ≤12.9 years)	13	29.4	4.6	20.2–37.40	6.5*	0.6	5.3–7.6
Long (≥13 to ≤15.5 years)	15	29.4	4.3	21.1–41.4	6.4#	0.9	5.4–7.9
Exceptional (≥15.6 years)	11	26.8	3.7	19.2–33.1	7.4*#	0.8	6.0–8.5

Means among longevity groups were compared using analysis of variance with post hoc pairwise comparisons; mean body weights were not significantly different (P = 0.36) whilst means within the age column that share an asterisk (*) or a hash (#) were significantly different (P = 0.01)

N number of dogs, SD standard deviation, Min–max range from minimum to maximum values