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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Aging Cell. 2013 Jun 5;12(4):645–651. doi: 10.1111/acel.12088

Table 1.

Characteristics of the study subjects

HUMANS RATS

WD-Y (n=5) WD-M (n=10) CR (n=15) P value AL (n=27) CR (n=27) P value
Age (years) 31.2±2.0 58.0±7.4 58.7±7.4 0.810 1.3 1.3 -
Sex (M/F) 5/0 8/2 11/4 - 27/0 27/0
BODY COMPOSITION
Height (m) 1.73±8.8 1.76±0.0 1.73±0.0 0.409 - - -
Body weight (kg) 78.4±16.3 78.1±9.7 57.5±6.4 <0.0001 0.40±0.7 0.24±0.2 0.001
Body mass index (kg/m2) 25.0±5.0 25.3±2.3 19.2±1.1 <0.0001 - - -
DEXA - NMR
Fat mass (%) - 24.0±7.4 13.1±4.8 <0.0001 30.1±0.2 27.2±0.2 0.01
Trunk fat (%) - 25.6±6.8 11.0±3.5 <0.0001 - - -
Lean mass (%) - 73.1±6.0 81.1±4.8 0.001 60.1±0.2 63.1±0.1 0.03

Values are mean ± SD. WD-Y=younger individuals eating Western diets (WD); WD-M=middle-aged individuals on WD; AL=ad libitum laboratory diet. For humans, p-value comparison CR – WD-M.