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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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Acta Veterinaria Scandinavica

ISSN: 1751-0147