Research and Funding

Aged Rodent Colonies Handbook

Strain Survival Information

The chart below provides the age at which 90%, 75%, 50%, 25% and 10% of the population has survived. These ages are averages derived from large populations (from Turturro et al., 1999), so survival data in small groups of animals will vary. Please Note: the NIA typically will not ship animals past the 25% survival age, as very old rats and mice are frail and more sensitive to the stresses of shipping. Very old rats and mice are also more prone to underlying age-associated diseases and are not a good research model for most purposes.

% Survival 90% 75% 50% 25% 10%
F344-cdf Males
14 mo.
19 mo.
22 mo.
25 mo.
27 mo.
F344-cdf Females
16 mo.
21 mo.
25 mo.
29 mo.
31 mo.
F344BN Males
25 mo.
29 mo.
34 mo.
37 mo.
38 mo.
F344BN Females
23 mo.
26 mo.
30 mo.
34 mo.
36 mo.
BN Males
22 mo.
27 mo.
32 mo.
34 mo.
36 mo.
BN Females
22 mo.
27 mo.
32 mo.
35 mo.
38 mo.
C57BL/6 Males
19 mo.
24 mo.
27 mo.
30 mo.
32 mo.
C57BL/6 Females
18 mo.
22 mo.
25 mo.
28 mo.
30 mo.
DBA/2 Males
16 mo.
22 mo.
25 mo.
28 mo.
29 mo.
DBA/2 Females
8 mo.
16 mo.
23 mo.
26 mo.
29 mo.