Table 2.

Total body weight (BW) and heart weight (HW) in female F344xBN rats at 6, 26, and 30 months of age (means ± SEM)

Groups	6 months	26 months	30 months
n	4	22	10
Heart weight (g)	0.72 ± 0.02	0.95 ± 0.02*	1.0 ± 0.04*†
Body weight (g)	235.3 ± 1.7	296.4 ± 6.5*	315.6 ± 8.6*
HW/BW ratio (%)	0.317 ± 0.02	0.32 ± 0.01	0.33 ± 0.01

Six-month-old animals; 26-month-old animals; 30-month-old animals

*p < 0.05, significantly different from 6-month-old animals

^† p < 0.05, significantly different from 26-month-old animals