Table 1.

Comparison of weights of Atm homozygous and control (wild type and Atm heterozygous) mice

Age	Sex	Genotype	Weight ± SE	n	Change
19–21 days	M	Control	11.66  ±  0.18	54
	M	Atm−/−	9.17  ±  0.42	12	−21%
	F	Control	11.84  ±  0.24	45
	F	Atm −/−	9.68  ±  0.46	12	−18%
38–42 days	M	Control	25.03  ±  0.34	32
	M	Atm −/−	21.40  ±  0.88	6	−15%
	F	Control	19.83  ±  0.49	17
	F	Atm −/−	17.44  ±  0.75	8	−12%

Data are presented at weaning (19–21 days of age) and as adults (38–42 days of age). All values are statistically significant (P < 0.012) by Student’s t test.