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Table 6 Body weight change (slope) for three age categories of Labrador retrievers up to death/censor date 31 July 2014

From: Exceptional longevity and potential determinants of successful ageing in a cohort of 39 Labrador retrievers: results of a prospective longitudinal study

Longevity category Up to 9 years 9–13 years After 13 years
N Mean (in kg/dog/year) SEM N Mean (in kg/dog/year) SEM N Mean (in kg/dog/year) SEM
Expected (≥9 to ≤12.9 years) 13 0.59 0.3 13 −0.15 0.31   N/A  
Long (≥13 to ≤15.5 years) 15 0.52 0.28 15 −0.91* 0.28 15 −1.41 0.68
Exceptional (>15.6 years) 11 0.4 0.36 11 0.53* 0.32 11 −1.31 0.74
  1. Means within the 9–13 years column which share an asterisk (*) are significantly different (P = 0.007); none of the means within the other two columns (up to 9 years, after 13 years) show any significant differences among them (P > 0.05)
  2. N number of dogs, SEM standard error of the mean