Table 2.

Effect of age on murine body composition as determined by NMR

Age group	% Fat mass	% Lean mass	% Free fluid	Body Wt (g)
8–9 months	13.5 ± 2.8	83.7 ± 2.3	2.8 ± 0.6	30.7 ± 1.9
28–29 months	12.0 ± 2.0	84.2 ± 2.4	3.8 ± 0.7	31.4 ± 3.8
p value	0.329	0.752	0.037	0.730

Total body NMR was conducted on n = 5 or 6 animals per age cohort at the completion of the activity/behavioral aspects of the study immediately prior to euthanasia. Values reflect the mean ± SD as either percentile of total body weight or body weight in grams. p values were determined by two-tailed Student’s t test