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Table 7 Results of linear mixed regression for average changes in body composition determined by DEXA scans performed annually up to 13 years of age

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

DEXA variable Longevity category
Expected (≥9 to ≤12.9 years) Long (≥13 to ≤15.5 years) Exceptional (≥15.6 years)
N Meana SEMb N Meana SEMb N Meana SEMb
Total fat mass (g) 13 1000* 165 15 320* 152 11 625 170
Total lean mass (g) 13 −593 127 15 −461 80 11 −269 165
Body fat (%) 13 2.69*# 0.35 15 1.25* 0.31 11 1.55# 0.36
Body lean (%) 13 −2.69*# 0.33 15 −1.31* 0.29 11 −1.58# 0.34
Fat:Leanb 13 0.06*# 0.01 15 0.03* 0.01 11 0.04# 0.01
Total BMC (g) 13 10 3.2 15 18 3.1 11 16.6 3.2
Total BMD (g) 13 0.0061*# 0.0022 15 0.0123* 0.0019 11 0.0131# 0.0024
  1. Means within a row that share an asterisk (*) or a hash (#) are significantly different (P < 0.05); means within a row with no asterisk or hash are not significantly different (P > 0.05)
  2. DEXA Dual-energy x-ray absorptiometer scans obtained using DXA Model Delphi-A, Serial No. 70852; Bedford, MA, USA
  3. N number
  4. a Means and standard errors of the mean (SEM) for changes in body composition (slope) as g/dog/year or %/dog/year up to 13 years
  5. b The fat to lean ratio was determined as total fat mass (g)/total lean mass (g)
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