. 2016 May 11;58:29. doi: 10.1186/s13028-016-0206-7

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

DEXA variable	Longevity category
	Expected (≥9 to ≤12.9 years)			Long (≥13 to ≤15.5 years)			Exceptional (≥15.6 years)
	N	Mean^a	SEM^b	N	Mean^a	SEM^b	N	Mean^a	SEM^b
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:Lean^b	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

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)

DEXA Dual-energy x-ray absorptiometer scans obtained using DXA Model Delphi-A, Serial No. 70852; Bedford, MA, USA

N number

^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

^b The fat to lean ratio was determined as total fat mass (g)/total lean mass (g)