Table 2. Aging rates of mice subjected to caloric restriction and/or genetic disruption of growth hormone signaling according to the classical method.

Caloric restriction	−	+	−	+
Disruption of growth hormone signaling	−	−	+	+
Population A	6.1 (4.6 to 7.5)	4.9 (3.6 to 6.2)	7.6 (5.6 to 9.6)	6.4 (4.9 to 8.0)
Population B	4.5 (3.8 to 5.3)	3.9 (3.2 to 4.6)	5.7 (4.8 to 6.6)	4.5 (3.8 to 5.2)

Aging rates estimated by the classical method are given with 95% confidence intervals and are shown × 1000 for legibility. These aging rates are expressed in units per day. These aging rates were estimated using the Gompertz model, equal the Gompertz model's parameter γ, and describe the linear increases in the mortality rates on a logarithmic scale.