Comparison of the incidence and time of onset of type 1 diabetes in wild-type NOD/ShiLtJ and NOD/ShiLtJ G6pc2−/− mice: the effect of sex. The incidence and time of onset of type 1 diabetes in male and female wild-type NOD/ShiLtJ, NOD/ShiLtJ G6pc2−/+, and NOD/ShiLtJ G6pc2−/− mice was compared starting at the age of 10 weeks. Clear differences were observed between male and female wild-type NOD/ShiLtJ mice (A), between male and female NOD/ShiLtJ G6pc2−/− mice (B), and between male and female NOD/ShiLtJ G6pc2−/+ mice (C). The number of animals studied is indicated in parentheses. Statistical significance between curves was determined by the log-rank (Mantel-Cox) test. Het, heterozygous; KO, knockout; WT, wild-type.