. Author manuscript; available in PMC: 2010 Aug 20.

Published in final edited form as: J Gerontol A Biol Sci Med Sci. 2004 Dec;59(12):1244–1250. doi: 10.1093/gerona/59.12.1244

Table 2.

Life Table Statistics

Genotype	Treatment^*	Life Span^†		Deaths	Alive	Total N
Genotype	Treatment^*	Median	Mean ± SD	Deaths	Alive	Total N
Normal	Saline	850	794 ± 224	38	1	39
Normal	Rx	818	791 ± 190	38	0	38
Normal	Rx + T4	761	714 ± 216	29	3	32
Dwarf	Saline	1146	1095 ± 332	27	8	35
Dwarf	Rx	1203	1121 ± 278	33	14	47
Dwarf	Rx + T4	993	928 ± 273	17	11	28

Notes:

Rx: 11 weeks of injection with growth hormone and thyroid hormone; Rx + T4: Rx followed by administration of T4 in food.

^†

Median life span, in days, is given for all mice in the population. Mean life span, ±SD (standard deviation), is given for those that had died at the time of analysis (April 2004). Mice still alive at this point are included as censored observations in the calculation of log-rank statistics testing differences between groups.